Class 9 – Page 18 – Maharashtra Board Solutions

Std 9 Geography Chapter 12 Question Answer Maharashtra Board

February 4, 2025January 3, 2025 by Prasanna

Balbharti Maharashtra State Board Class 9 Geography Solutions Chapter 12 Tourism Notes, Textbook Exercise Important Questions and Answers.

Tourism Class 9 Questions And Answers Maharashtra Board

Class 9 Geography Chapter 12 Tourism Questions And Answers Maharashtra Board

Geography Class 9 Chapter 12 Question Answer Maharashtra Board

1. Identify the type of tourism from the statement.

(A) Hemant Kumar went to Mexico to learn about the architectural skills of the Mayan culture
Answer:
Cultural Tourism

(B) Portuguese tourists had come to Goa to participate in the Goa Carnival.
Answer:
Cultural Tourism

(D) Pundalikrao accomplished the Char Dham Yatra with his family
Answer:
Religious Tourism.

(E) Rameshwari from Pune went to enjoy Hurda ( Roasted Grain) party and learn about modern and traditional methods of agriculture
Answer:
Agro-tourism.

(F) Sayyed family went to Ajmer Durgah.
Answer:
Religious tourism.

2. Match the columns identifying the correlation. Make a chain.

	Group ‘A’	Group ‘B’	Group ‘C’
(1)	Tadoba	Madhya Pradesh	Lake
(2)	Bird Sanctuary	Agra	Butterflies
(3)	Sanjay Gandhi National Park	Manipur	Kailash caves
(4)	Taj Mahal	Nannaj	Film city
(5)	Ramoji Film City	Ellora	World-famous wonder
(6)	Radhanagari	Mumbai	Ancient cave- paintings
(7)	Bimbetka	Hyderabad	Great Indian Bustard (Maaldhok)
(8)	Ancient Caves	Kolhapur	Kanheri Caves
(9)	Eaglenest Wildlife Sanctuary	Chandrapur	Bison
(10)	Loktak	Arunachal Pradesh	Tiger

Answer:

	Group ‘A’	Group ‘B’	Group ‘C’
(1)	Tadoba	Chandrapur	Tiger
(2)	Bird Sanctuary	Nannaj	Great Indian Bustard (Maaldhok)
(3)	Sanjay Gandhi National Park	Mumbai	Kanheri Caves
(4)	Taj Mahal	Agra	World-famous wonder
(5)	Ramoji Film City	Hyderabad	Film city
(6)	Radhanagari	Kolhapur	Bison
(7)	Bimbetka	Madhya Pradesh	Ancient cave- paintings
(8)	Ancient Caves	Ellora	Kailash caves
(9)	Eaglenest Wildlife Sanctuary	Arunachal Pradesh	Butterflies
(10)	Loktak	Manipur	Lake

3. Answer in brief.

Question 1.
Differentiate between religious and cultural tourism.
Answer:

Religious tourism	Cultural tourism
(i) religious tourism is a type of tourism in which tourists travel for pilgrimage.	Cultural tourism refers to a type of tourism in which tourists travel to cultural attractions away from residence to gather new information and experience.
(ii) In religious tourism various religious places, temples, churches, etc. are visited for performing religious activities and gaining spiritual peace.	In cultural tourism art, architecture, religion, customs, traditions, lifestyle, etc. of a particular region are experienced and studied.
(iii) For example, a visit to Shirdi, Haji Ali, Mount Mary Church, etc.	For example, Portuguese tourists participating in Goa carnival.

Question 2.
What are the objectives of tourism?
Answer:
Following are the objectives of tourism:

Getting joy
Getting entertained
Trading
Staying
Availing health facilities
Getting a glimpse of agricultural life
Performing religious activities, etc.

Question 3.
Explain the environmental effects of tourism.
Answer:
Following are the environmental effects of tourism:

Sometimes, tourists damage tourist place and degrade the environment. Some tourists throw litter and pollute the tourist place.
Therefore, all tourists must follow the concept of eco-tourism. Eco-tourism includes taking precautions of not degrading and polluting the environment as well as not damaging tourist places.
Tourism is good for environmental development as the government makes economic investment in developing sanctuaries and national parks for the sake of the tourism industry.
In eco-friendly tourism, factors like designing houses, resorts, traffic routes are designed in an eco-friendly manner in which electricity and water are used judiciously.
The concept of recycling and reuse is also applied in eco-friendly tourism.

Question 4.
What opportunities develop with the development of tourism?
Answer:

Tourism and Economic Development: The development of infrastructural facilities generates employment on an large scale. Eg. transportation, banking, restaurants, shops, resorts, medical services etc.
Tourism and Environmental development: Due to the Eco-friendly tourism concept, tourist places are developed while caring for the environment. Eg. Eco-tourism.
Tourism and’ Health: Opportunities to avail health facilities develop with tourism. Eg. Indian Ayurveda, Yoga, Pranayam.
Tourism and Social Developments: Tourism creates social consciousness among tourists which helps in the development of neglected components of the society. For eg. Visit to Anandwan village.

Question 5.
Suggest measures after explaining the problems arising at the tourist places.
Answer:
(i) The problems that may arise at the tourist places:

Lack of basic facilities.
Lack of frequency of means of transportation.
Lack of medical facilities.
Lack of communication facilities.
Petty crimes and security issues.

(ii) Measures to minimize the problems arising at the tourist places:

Government can provide lodges, eateries, clean drinking water and good sanitation facilities.
All tourist places can be connected by speedy means of transportation.
Government can open dispensaries and arrange ambulance facilities.
Communication facilities can be developed at every tourist place.
Installation of CCTVs in public places and prompt action by the law and order forces can help tourist immensely.

Question 6.
Explain with the reason the places of interest that can be developed as tourist centers in your district.
Answer:

In the district of Mumbai, there are many tourists destinations which fascinate the tourists.
But there are few places which can be developed as tourist centres, which are currently neglected.
To name a few, there are some small forts on the beaches of Mumbai and some caves in the suburbs of Mumbai.
The Sion fort and the fort of Mahim are currently in a bad state and need urgent restoration.
The Mahakali caves situated in western suburbs of Mumbai need to be developed in order to preserve cultural heritage which can attract many tourists.

(Disclaimer: The students can write answer of this above question in their own words as per the district they belong to.)

Question 7.
Local people get employment due to tourism. Give reasons.
Answer:

Tourism is an important tertiary occupation through which many tourists visit places of interest.
Many job opportunities are created to serve the tourists.
When basic infrastructure improves, it leads to generation of employment.
Many local people get job opportunities from various restaurants, transportation systems and recreational places.

5. Make a notice board containing instructions for the tourists at a tourist place.
Answer:

Maharashtra Board Class 9 Geography Solutions Chapter 12 Tourism 1

6. Explain how relevant is the concept of “Atithi Devo Bha va” (Guest is our God) with respect to tourism.
Answer:

In Sanskrit “Atithi Devo Bhava” means “Guest is our God”. This is a tag line of India’s, Ministry of Tourism’s campaign to improve the treatment of tourists in India.
India attracts millions of tourists every year but it still lags far behind compared to other destinations.
With an attempt to improve the number of tourists travelling to India, the Tourism Department of India started this social awareness campaign which provides training and orientation to taxi drivers, guides, immigration officers, police and other personnel who interact directly with the tourists.
This campaign educates the citizens of our country about the importance of our cultural heritage, benefits of cleanliness, importance of foreign tourists and maintaining our historical monuments.
All these efforts will lead to the economic development of our country.

7. The tourism map of Maharashtra is given. Answer the following questions based on the map.
Maharashtra Board Class 9 Geography Solutions Chapter 12 Tourism 2

Question 1.
Make a list of places having hot springs. What are the reasons for these being located here?
Answer:
Say, Vajreshwari, Kapeshwar, Unakeshwar, linhavare, Unapdev are the places that have hot springs.
Reason of hot water springs because geothermally heated ground water rises from the Earth’s crust.

Question 2.
At what places do you find the correlation between transportation routes and the development of tourism?
Answer:

Aurangabad: The national highway and the airport is located in Aurangabad which facilitates the tourists to visit Ajanta and Ellora caves.
Shirdi: Since Shirdi has got a railway station, more devotees will visit the temple every year.

Class 9 Geography Chapter 12 Tourism Intext Questions and Answers

Can you tell?

(I) Dear Students, imagine that you have to go on a vacation with your family. Make a list of 15 favourite places in Maharashtra.
After the list is prepared, put your places in the relevant classification.

Places near the sea
Historical places
National parks and sanctuaries
Hill stations
Religious places

Select one place from each group which you would like to visit.

Discuss the reasons of your choice in the class.
Answer:
(A) A list of 15 favourite places in Maharashtra

Mumbai
Pune
Nashik
Alibaug
Guhagar
Malvan
Shirdi
Shegaon
Chandoli
Pench
Kamala
Matheran
Mahabaleshwar
Jawhar
Parli Vaijanath.

(B) A relevant classification of 15 favourite places is as follows:
(1) Places near the sea :

Alibaug
Guhagar
Malvan.

(2) Historical places :

Pune
Mumbai
Nashik.

(3) National parks and sanctuaries :

Chandoli
Pench
Kamala.

(4) Hill stations:

Matheran
Mahabaleshwar
Jawhar.

(5) Religious places :

Parli Vaijanath
Shirdi
Shegaon.

(C) Name of a place from each group which we would like to visit with reason :
(1) Name of a place near the sea which we would like to visit: Guhagar.
Reason: Guhagar is famous for its clean white sand beach. ‘Shri Vyadeshwar’ an ancient shiv temple is also located at Guhagar.

(2) Name of a historical place which we would like to visit: Pune.
Reason : Many historical forts are located in Pune.

(3) Name of a national park and sanctuary which we would like to visit: Karnala.
Reason : Karnala bird sactuary houses many species of resident birds.

(4) Name of a hill station which we would like.to visit: Matheran.
Reason : One can reach Matheran by a Toy Train. Horse riding is another tourist attraction of Matheran. There are gardens, waterfalls, temples, markets and many scenic points at Matheran.

(5) Name of a religious place which we would like to visit: Shegaon.
Reason : A famous ‘Gajanan Maharaj Temple’ is located at Shegaon. Anand Sagar’, a spiritual and entertainment park centre is also located at Shegaon.

(II) (i) Which new forms of tourism have developed recently? (Textbook Page no. 92)
(ii) Tell the reasons why new forms of tourism emerge. (Textbook Page no. 92)
Answer:
(i) In recent years, following are the new forms of tourism that have developed:

Eco-Tourism
Agro-Tourism
Film Tourism
Medical Tourism
Cultural tourism

(ii) Nowadays people are more aware of new tourist destinations and attractions, have the ability to spend and need break from their routine stressful life. They take breaks to refresh and relax or may travel for some psychological and social needs.

Think about it.

We saw the various types of tourism. Just think, can we go into the space for tourism? What will we have to do for that? Where can we go? Present your ideas in the form of picture or paragraphs, etc.
Answer:
Yes, we can go into the space for tourism. We will require a the most powerful rocket built with a spaceship designed to carry atleast 100 people. We can go to the Red Planet-Mars.

Use your brain power!

Some issues related to tourism development are given below. Rewrite the inappropriate ones after correcting them.
Answer:

The income of a country should be substantially high for development of tourism. Inappropriate: The income of a country is high due to development of tourism.
Domestic tourism should be given a boost. Inappropriate: Domestic tourism should be given a boost.
Tourists from other countries should be banned. Inappropriate: Tourists from other countries should be welcomed for economic development of our country.
Appropriate: Tourists should be assured of a safe journey.
Appropriate: The cultural heritage of a country should be preserved.
Appropriate: We should respect other country’s culture.
Appropriate: Government subsidies1 and incentives should be given for tourism businesses.
Appropriate: Participation in international sports should be increased.
Appropriate: Tourism should be encouraged through advertisements.
Appropriate: It is necessary to preserve the tourist places.
Appropriate: We should preserve buildings of famous people who have contributed in various sectors for memorials.
Appropriate: Services and amenities3 should be developed for tourism.
Tourist agencies should be banned. Inappropriate: Tourists agencies should be encourage for their businesses.
There is no ample scope in this field. Inappropriate: There is ample scope in the field of tourism.
Appropriate: Tourism is a type of invisible trade.
Appropriate: All types of facilities should be developed for tourists.
The country’s economy does not benefit at all from tourism. Inappropriate: The country’s economy benefits a lot from tourism.
Appropriate: The hidden potential of other sites should also be developed.
Appropriate: The forts and castles should be developed.

Class 9 Geography Chapter 12 Tourism Additional Important Questions and Answers

Complete the following statements by choosing the appropriate alternatives from those given in the brackets:

Question 1.
Visiting various places away from our homes for getting joy, entertainment, trading, staying, etc. is called
(a) boarding
(b) lodging
(c) visiting
(d) tourism1
Answer:
(d) tourism

Question 2.
On the basis of political boundaries, tourism can be of two types and
(a) domestic tourism and local tourism
(b) international tourism and foreign tourism
(c) local tourism and holidays
(d) domestic tourism and international tourism
Answer:
(a) domestic tourism and international tourism

Question 3.
Tourism within the limits of a country is called …………………. .
(a) domestic tourism
(b) international tourism
(c) foreign tourism
(d) abroad tourism
Answer:
(a) domestic tourism

Question 4.
A person from Maharashtra going to Kanyakumari in Tamil Nadu for tourism, a person from Nagpur visiting Ellora Caves in Aurangabad are examples of
(a) international tourism
(b) abroad tourism
(c) domestic tourism
(d) foreign tourism
Answer:
(c) domestic tourism

Question 5.
Crossing country’s boundaries and visiting some other country for tourism is called
(a) local tourism
(b) international/ foreign tourism
(c) city tourism
(d) state tourism
Answer:
(b) international foreign tourism

Question 6.
Indian going to Switzerland for tourism, an American coming to India for tourism are examples of
(a) city tourism
(b) state tourism
(c) local tourism
(d) intemational/foreign tourism
Answer:
(d) international/ foreign tourism

Question 7.
………………….. tourism should be promoted as it is necessary to preserve the cultural heritage1 of a country.
(a) Mumbai
(b) Local
(c) Andheri
(d) Domestic
Answer:
(d) Domestic tourism

Question 8.
To go to a foreign country, one needs a ………………, ………………, travel insurance and other documents.
(a) passport, train tickets
(b) visa, bus tickets
(c) movie tickets, bus tickets
(d) passport, visa
Answer:
(d) passport and visa

Question 9.
The ……………… system in our smartphones or the GPS instrument is largely used for tourism. For that we need special applications like the
(a) GPRS and atlas
(b) GPS and radio
(c) GPS and google map
(d) google play store and GPRS
Answer:
(c) GPS and google map

Question 10.
Tourism is an important occupation.
(a) primary
(b) secondary
(c) tertiary
(d) quaternary
Answer:
(c) tertiary

Question 11.
Besides domestic tourists2, foreign tourists also visit various places of interest and therefore, ……………… currency increases in our economy.
(a) domestic
(b) foreign
(c) FOREX
(d) shares
Answer:
(b) foreign

Question 12.
Tourism should be promoted through in various media which will help in its growth.
(a) slogans
(b) word of mouth
(c) references
(d) advertisements
Answer:
(d) advertisements

Question 13.
……………… has implemented many programmes by providing guest houses, water sports, tourist houses near coastal areas, etc.
(a) Maharashtra Tourism Development Corporation (MTDC)
(b) Maharashtra Transportation Development Corporation (MTDC)
(c) Maharashtra Traffic Development Corporation (MTDC)
(d) Maharashtra Training Development Corporation (MTDC)
Answer:
(a) Maharashtra Tourism Development Corporation (MTDC)

Question 14.
……………… is a train started especially for tourism which is operated in coordination with MTDC, Indian Railways and Ministry of Tourism.
(a) Deccan Chronicle
(b) Deccan Express
(c) Mumbai Local
(d) Deccan Odyssey
Answer:
(d) Deccan Odyssey

Question 15.
………………….. train takes the Delhi-Jaipur-Udaipur-Bharatpur-Agra- Delhi route.
(a) Palace of Tiles
(b) Palace on Train
(c) Palace on Wheels
(d) Palace in Rajasthan
Answer:
(c) Palace on Wheels

Question 16.
The Indian railways have started a new train with coaches having transparent ceiling as a special attraction for tourism.
(a) superdome
(b) astrodome
(c) imax dome
(d) vistadome
Answer:
(d) vistadome

Question 17.
………………….. is an eco-friendly type of tourism.
(a) Medical tourism
(b) Eco-tourism
(c) Social tourism
(d) Religious tourism
Answer:
(b) Eco-tourism

Question 18.
A pollution-free location away from the city holding an agricultural activity where the tourist is shown a glimpse of agricultural life is called
(a) agro-tourism
(b) social tourism
(c) cultural tourism
(d) medical tourism
Answer:
(a) agro-tourism

Question 19.
In and districts of Maharashtra number of agro-tourism centres have been developed.
(a) Pune, Mumbai
(b) Mumbai, Nagpur
(c) Pune, Kolhapur
(d) Kolhapur, Amravati
Answer:
(c) Pune, Kolhapur

Question 20.
Places, where film shooting takes place, are and
(a) Mumbai film city, Ramoji city
(b) Pune city and Mahableshwar
(c) Ramoji city and Pune city
(d) Lonavala and Khandala
Answer:
(a) Mumbai film city, Ramoji City

Question 21.
………………….. in Konkan is famous for its seabed and the biodiversity found there.
(a) Juhu Beach
(b) Tarkali
(c) Alibaugh
(d) Sindhudurg
Answer:
(b) Tarkali

Question 22.
The tribal life in of Maharashtra and visit to model villages like project of the social activist Baba Amte, Ralegan Siddhi, Hiwre Bazaar, etc. creates social consciousness.
(a) Phonda Ghat, Vrindavan
(b) Melghat, Sunderbans
(c) Melghat, Anandwan
(d) Bor Ghat, Anandwan
Answer:
(b) Melghat, Anandwan

Answer in one sentence

Question 1.
What is meant by tourism?
Answer:
Visiting various places away from our homes for getting joy, entertainment, trading, staying etc. is called tourism.

Question 2.
By which name is the tourism within one’s own country’s boundaries is known?
Answer:
The tourism within one’s own country’s boundaries is known as ‘domestic tourism’.

Question 3.
What do mean by International tourism?
Answer:
Crossing country’s boundaries and visiting some other country for tourism is called international tourism.

Question 4.
A visit to which places in Maharashtra creates social consciousness?
Answer:
Visit to Melghat to see the tribal life and visit to model villages like Anandwan, Ralegansiddhi, Hiwre Bazaaro of Maharashtra creates social consciousness.

Question 5.
Anandwan’ is a project of which social activist?
Answer:
Anandwan’ is a project of the social activistt Baba Amte.

Question 6.
What is Cultural Tourism?
Answer:
Cultural tourism is a type of tourism in which tourists travel to collect information and to experience traditions, customs, art, lifestyle of people, etc. of a particular region.

Question 7.
What is Health Tourism?
Answer:
Health tourism is a type of tourism in which tourists travel for availing health facilities, achieving mental peace and physical strength.

Question 8.
What do we require when travelling abroad?
Answer:
To go abroad one requires a passport, visa, travel insurance, other documents and currency of the country where we are going.

Question 9.
Name the agro-tourism centres in Maharashtra.
Answer:
Pune and Kolhapur districts of Maharashtra have agro-tourism centres.

Observe fig. 12.1 and answer the following questions: Use an atlas for reference:
Maharashtra Board Class 9 Geography Solutions Chapter 12 Tourism 3

Question 1.
Out of these, which tourist places1 do you know? Make a list.
Answer:
A list of known tourist places :

Leh
Shimla
Mussoorie
Nainital
Jaisalmer
Ajanta
Ellora
Tirupati
Udagamandalam
Rameshwar
Jagannath puri
Konark
Khajuraho
Panaji.

Question 2.
For what are the selected places famous?
Answer:
The selected places are famous for the following:

Leh, Shimla, Mussoorie, Naini Tal, etc. – famous for their natural beauty.
Rameshwaram, Tirupati, Jagannathpuri – religious places.
Ajanta, Ellora, Konark, Khajuraho – cultural sites.
Mumbai, Pune, Delhi, Kolkata – historical sites

Question 3.
Make a list of religious and historical sites from the map.
Answer:

Religious sites	Historical sites
Tirupati	Dwarka
Mathura	Agra
Varanasi	Jhansi
Konark	Jaipur

Question 4.
Make a list of hill stations, places having sanctuaries and places along the coasts.
Answer:
(A) Hill stations –

Shimla
Massoorie
Nainital
Darjiling

(B) Sanctuaries –

Maharashtra – Koyna, Wild life Sanctuary
Goa – Bird sanctuary
Gujarat – Indina wild Ass. sanctuary
Karnataka – Bhadra wild life sanctuary

Mumbai
Panaji
Mangalore
Chennai

Question 5.
Correlate the physiography and tourist places in India.
Answer:

There is a close relationship between physiography and tourist places in India.
Many tourist places are developed at various locations having different physiography.
The hill stations like Jammu, Srinagar, Nainital, Darjiling, Udagamandalam are developed in mountainous region of India.
The tourist places like Ujjain, Pune, Jabalpur, etc. are located at plateau region of India.
The tourist places Jodhpur, etc. are developed in desert area of India.
The tourist places like Mumbai, Panaji, Mangalore, Kanniyakumari, Chennai, etc. are located in the coastal area of India.

The tourism map of Maharashtra is given below. Answer the following questions based on the map:
Maharashtra Board Class 9 Geography Solutions Chapter 12 Tourism 4

Question 3.
Name the ports of Konkan coast and is there any connectivity of ports with tourism?
Answer:
Mumbai, Vijaydurg, Sindhudurg, Ratnagiri, Jaygad, Harne, Shrivardhan.
Yes, there is a close connectivity between ports and tourism as tourists can reach such places by sea without wasting much time in travelling.

Question 4.
Name some of the caves in Maharashtra.
Answer:
Karle, Bhaje, Mhasrul, Ajanta, Verul, Kharosa, Pullar are some of the caves in Maharashtra.

Give reason

Question 1.
Social development be accomplished through tourism.
Answer:

When facets1 like rural lifestyle, tribal life and culture are included in tourism then tourism gets a social dimension1 and the neglected components can be included in development.
The tribal life of Mel ghat of Maharashtra and visit to model villages like ‘Anandwan’, a project of the social activist Baba Amte, Ralegansidhhi, Hiwre Bazaar, etc. creates social consciousness and gives a fillip to development there.
There is a great potential2 for development of such a type of tourism in India through which social development can be accomplished.

Question 3.
Tourism is an invisible Trade’.
Answer:

Invisible Trade is a trade in which exchange of services occurs. Example of invisible trade. Tourism is a type of invisible trade.
Various restaurants, shops, transportation systems and recreational places are developed because of tourism and contribute directly to the economy.
Also, basic infrastructure improves and employment is generated which is an advantage to the economy indirectly.
Thus, tourism plays an important role in economic development and hence it is said that tourism is an invisible trade.

Question 4.
Tourism is good for environmental development.
Answer:

Tourism is good for environmental development.
Because of eco-friendly tourism concept, tourist places can be developed while caring for the environment.
Factors like housing, resorts, traffic routes, etc. are also designed in an eco-friendly manner.
In this type of development process, electricity, water are used very judiciously. The concept of recycle and reuse is also applied.
Natural environment is maintained and tourism is developed too.

Answer in 2-3 Sentences.

Question 1.
What is the speciality of Deccan Odyssey?
Answer:

Deccan Odyssey is a luxury train operated in co-ordination with MIDC, Indian Railways and Ministry of Tourism.
Deccan Odyssey is like a moving palace.
It originates at Mumbai and takes tourists to Nasik, Ellora, Ajanta, Koihapur, Goa and Ratnagiri.

Question 2.
Write about the luxury train for tourists visiting Northern india.
Answer:

Palace on wheels” is the luxury train that covers the Northern India.
This train takes the Deihi-Jaipur, Udaypur, Bharatpur, Agra Delhi route.
Domestic arid foreign tourists enjoy travelling in this train.

Question 3.
Why is Vistadome a special attraction for tourists?
Answer:

The coaches of Vistadome have a transparent ceiling which is a special attraction for tourists.
It runs on the Vishakapatnam Kirandul route.
As the train has a glass roof, the tourists can enjoy the panaromic view of the beautiful Arakuvalley, Anantgiri Ghat and Borra Coves.

Question 4.
What is Tarkarli in Konkan renowned for?
Answer:

Tarkarli in Konkan is renowned for its seabed and biodiversity.
Tourists can do snorkelling and scuba diving here.
MTDC has set up a ‘scuba diving’ training centre of International standards at Tarkarli.

Question 5.
How is the GPS useful for tourists?
Answer:

The GPS instrument found in applications like Google App location.
Information regarding all possible routes of travel, distances, time require according to the type of vehicle, amenities on the way like petrol pump, restaurants etc. becomes available through GPS.

Write short note on:

Question 1.
GPS for tourism
Answer:

The GPS system in our smartphones or the GPS instrument is largely used for tourism.
For that we need special applications like the Google Map.
We can know our exact location with the help of the map.
Once it is decided where we want to head, then information regarding all the possible routes of travel, distances, time required according to type of vehicle, amenities on the way like petrol pump, restaurants, lodges, etc. becomes available in the app.
We can use this for tourism.

Question 2.
MTDC
Answer:

Maharashtra Tourism Development Corporation (MTDC) has implemented many programmes.
It has provided guest houses, water sports, tourist houses near coastal areas, etc.
“Deccan Odyssey” is a train started especially for tourism which is operated in coordination with MTDC, Indian Railways and Ministry of Tourism.
The train originates at Mumbai and takes tourists to places like Nashik, Ellora, Ajanta, Kolhapur, Goa and Ratnagiri and back to Mumbai.

Question 3.
Domestic Tourism.
Answer:

Tourism within the limits of the country is called Domestic Tourism.
For example, a person from Maharashtra going to Kanyakumari in Tamil Nadu for a vacation, a person from Nagpur visiting Ellora Caves in Aurangabad and so on.

Question 4.
International Tourism.
Answer:

Crossing the country’s boundaries and visiting some other country for tourism is called International Tourism.
Glossary
For example, an Indian going to Switzerland 1 for tourism, an American coming to India for tourism and so on.

Question 5.
Things required to travel to a foreign country.
Answer:
Following are the things required to travel to a foreign country:

A Passport, visa, travel insurance and other documents.
Currency of the country you are going to visit.

Question 6.
Eco-friendly tourism (Eco tourism).
Answer:

The concept of eco-friendly tourism came into light when it was realised that due to increasing population, pollution and urbanization, environment is degrading.
The nature of ecotourism is eco-friendly.
In ecotourism, the tourists the place are visited by taking precautions of not damaging or degrading the environment.
Ecotourism includes avoiding sound pollution, and air pollution, not hurting trees, birds, animals, etc. in the forests, etc.

Question 7.
Agro tourism.
Answer:

Recently the concept of ‘agro-tourism’ has arisen which is visiting a pollution-free location away from the city holding an agricultural activity.
In agro-tourism, the tourists are shown a glimpse of agricultural life.
For a change from the urban life, tourists live on the farm and accept the hospitality of the farmers on payment in agro-tourism.
In Pune and Kolhapur districts of Maharashtra number of agro-tourism centres have been developed.

Question 8.
Film tourism.
Answer:

In film tourism, the locations where films are shot are shown to the tourists.
A number of amenities and facilities are provided at such places to attract tourists.
Mumbai film city, Ramoji film city are the famous film tourist places in India.

Question 9.
Coastal (sea) tourism
Answer:

Coastal (sea) tourism is a new type of tourism.
Tarkarli in Konkan is famous for snorkelling and scuba diving. It is also famous for its seabed and the biodiversity.
MTDC has started a ‘scuba diving training centre’ of international standards at Tarkarli of Malwan taluka in Sindhudurg district.

Answer in brief:

Question 1.
Which new forms of tourism have developed recently?
Answer:
In recent years, the following are the new forms of tourism that have developed:

Eco-tourism: While touring a place the environment should not be degraded or damaged by tourists, then it is called Ecotourism.
Agro-tourism: Concept of ‘agro-tourism’ has arisen where pollution-free location away from the city holding an agricultural activity is visited. There the tourists are shown a glimpse of agricultural life.
Film Tourism: Film tourism is a new type of tourism. The locations where films are shot are shown to tourists.
Medical Tourism: The medicinal and surgical treatment in Indian hospitals are cost-effective and therefore, many patients from various developing countries come here for treatment.
Medical Tourism develops from such facilities required by these tourists.

Question 2.
Explain the importance of tourist development in India.
Answer:

India is diverse in terms of culture and nature, due to which India has a lot of potential for tourism.
The richness of natural beauty in India, attractive landscapes and high mountains like Flimalayas exquisite coastal areas attract tourists.
Also, the diversity of Indian culture, festivals, traditions and customs have resulted in opportunities for tourism in India.

Question 8.
What are the reasons of following medical tourists in India?
Answer:

Many tourists visit India to avail health facilities, to achieve mental peace and physical strength through Indian Ayurveda, Yoga and Pranayam.
The medicinal and surgical treatment in Indian hospitals are cost-effective and therefore many patients from various developing countries come here for treatment.
Hence, medical Tourism develops from the facilities required by these tourists.

9th Std Geography Questions And Answers:

Std 9 Geography Chapter 7 Question Answer Maharashtra Board

February 4, 2025January 3, 2025 by Prasanna

Balbharti Maharashtra State Board Class 9 Geography Solutions Chapter 7 International Date Line Notes, Textbook Exercise Important Questions and Answers.

International Date Line Class 9 Questions And Answers Maharashtra Board

Class 9 Geography Chapter 7 International Date Line Questions And Answers Maharashtra Board

Geography Class 9 Chapter 7 Question Answer Maharashtra Board

1. Two boxes in different hemispheres are given in the following diagram. The IDL passes through both the boxes. In one box, the meridian, day and date is given. Find the day and date for the other box.
Maharashtra Board Class 9 Geography Solutions Chapter 7 International Date Line 1
Answer:

2. Select the correct option :

Class 9 Geography Chapter 7 International Date Line Question 1.
While crossing the IDL, a person will have to add one day when traveling from
(a) East to West
(b) West to East
(c) South to North
(d) North to South
Answer:
(a) East to West

International Date Line Class 9 Question 2.
If it is Wednesday 10 a.m. at 150 E meridian, then what will be the time at IDL?
(a) Wednesday at 6 a.m.
(b) Wednesday 9 p.m.
(c) Thursday 2 p.m.
(d) Thursday at 6 p.m.
Answer:
(b) Wednesday 9 p.m.

International Date Line Questions And Answers Question 3.
According to the international convention, at which meridian does the day and date change occurs?
(a) 0°
(b) 90° E
(c) 90° W
(d) 180°
Answer:
(d) 180°

International Date Line 9th Std Geography Question 4.
At which direction of the IDL does a new day start immediately?
(a) East
(b) West
(c) North
(d) South
Answer:
(b) West

9 Std Geography International Date Line Question 5.
IDL brings coordination in which of the following?
(a) GPS system
(b) Defence departments
(c) Transportation schedules
(d) Determining the hemisphere
Answer:
(c) Transportation schedules

3. Give geographical reasons

Std 9 Geography Chapter 7 International Date Line Question 1.
IDL is proving to be very useful in today’s times
Answer:
IDL is proving to be very useful in today’s times because:

The IDL brings coordination between international airlines, transportation services, economic and trade activities.
The IDL has been carved out of the necessity of coordinating time and date.
It is also important in today’s modern era and rapidly happening global developments.
We can keep a track of all the calculations of a day and time accurately with the help of IDL in case of global transportation especially, with respect to airways.
It is only because of the IDL that the schedules of the traffic worldwide are organised properly.

Class 9th Geography Chapter 7 Question Answer Question 2.
The day starts in the Pacific Ocean on the earth
Answer:

The IDL passes through the Pacific Ocean.
With reference to the IDL, the day on Earth starts in the West and ends in the East.
It is one and the same day only at 12 o’clock midnight at the 180° meridian.
For the countries lying to the east of it i.e. the USA, Chile, etc., it is the end of the day while for the countries lying to the west of it i.e. Japan, Australia, etc. it is the start of a new day.

Thus, a new day starts in the Pacific Ocean on Earth.

4. Write in brief:

International Date Line Std 9 Question 1.
What considerations have been made while deciding the IDL?
Answer:
The following points were taken into consideration while drawing the International Date Line. (IDL):

1. The direction of travel
2. The current day and date

- Accordingly, while traveling from East to West of IDL, a day is added. For example, while travelling from America to Japan, if it is Thursday 25th December, then it will be Friday 26th December in Japan.
- While from West to East of IDL, the day remains the same. For example, while travelling from Japan to America, if it is Thursday 25th December, then Thursday 25th December, only should be considered.

Question 2.
While crossing the IDL, what changes will you make?
Answer:

When you cross the 180° meridian, some precautions need to be taken.
There is a difference of 12 hours from Prime Meridian, if you go from East or West.
According to the convention, the start (and end) of a date is considered to be at 180° Meridian.
Accordingly, an adjustment or change in day and time is made. Thus, while travelling from east to west of IDL , a day is added whereas while travelling from west to east of IDL, the day remains the same.

Question 3.
Why is the IDL not a straight line like the 1800 meridian?
Answer:

Attempt has been made to make the IDL pass through the Pacific Ocean completely.
Had it passed through a land or some islands, the people there would have had to follow different dates and timings because dates would have been different on their Eastern and Western parts.
Also, it would have been difficult to know when one crosses the IDL on land, and when the date changes on the calendar.
Therefore, the IDL is not a straight line like the 1 180° Meridian. At places, it turns East while at other places, it turns West.

Question 4.
Why doesn’t the IDL pass through land?
Answer:

If the IDL had passed through a land or some islands, the people there would have had to follow different dates and timings because dates would have been different on their Eastern and Western parts.
Also, it would have been difficult to know when one crosses the IDL on land and when the date changes on the calendar.
Hence, the IDL does not pass through land

Question 5.
Why is the IDL considered with respect to the 1800 meridian only?
Answer:

Our 24-hour day starts at 12 midnight. Because of the earth’s rotation, the midnight occurs at different times, at different places.
As the Earth is spherical in shape, every place has a place to its East.
So, it was necessary to determine at what location to the East does the day start on Earth.
Hence, representatives of many nations got together, under the leadership of an American Professor, Davidson, in the year 1884 and decided the International Date Line.
The line was drawn opposite to the Greenwich Prime Meridian i.e. with reference to the 180° Meridian.

5. Using an atlas, tell in which of the following routes the IDL will be crossed and show them on the map.

(1) Mumbai- London- New York- Los Angeles- Tokyo
(2) Delhi- Kolkata- Singapore- Melbourne
(3) Kolkata- Hong Kong- Tokyo- San Francisco
(4) Chennai-Singapore- Tokyo- Sydney-Santiago
(5) Delhi-London-New York
Maharashtra Board Class 9 Geography Solutions Chapter 7 International Date Line 3
Answer:
(1) Mumbai – London – New York – Los Angeles – Tokyo – IDL will be crossed.
(2) Delhi – Kolkata – Singapore – Melbourne – IDL will not be crossed
(3) Kolkata – Hong Kong – Tokyo – San Fransico – IDL will be crossed.
(4) Chennai – Singapore – Tokyo – Sydney – Santiago – IDL will be crossed
(5) Delhi – London – New York – IDL will not be crossed.

Class 9 Geography Chapter 7 International Date Line Intext Questions and Answers

Use your Brain Power:

Question 1.
You are traveling from the Kamchatka Peninsula (in the northern hemisphere) to New Zealand (in the southern hemisphere) along the IDL. It is Monday, 22nd June in the northern hemisphere. What will the day and date in the southern hemisphere?
Answer:
The day will be Monday, 22nd June as we are not crossing the IDL.

Examine a ticket of UA 876 Boeing 787-9 Dreamliner closely and find the answers to the following questions:
Maharashtra Board Class 9 Geography Solutions Chapter 7 International Date Line 4

Question 1.
From which country will the plane take off and where will it go?
Answer:
The plane will take off from Tokyo (Japan) and will go to San Francisco, California (USA)

Question 2.
What is the duration of the flight?
Answer:
The duration of the flight is 9hrs and 15 min.

Question 3.
What is the day, date and time given at the starting point and destination of the flight?
Answer:
At the starting point of Tokyo (Japan) it is Friday, 1st April 12.30 am and at the destination of San Francisco California (USA) it will arrive on Thursday March 31st at 5.45 pm.

Question 4.
What special note is given on the air ticket?
Answer:
A special note on the ticket states that the flight involves a date change.

Question 5.
What could be the reason behind giving such a note?
Answer:
The reason behind giving such a note is to make us understand that the flight will cross the IDL

Question 6.
During this flight, will the plane cross the IDL? If yes, then from which direction to which direction?
Answer:
During this flight, the plane will cross the IDL from west to east.

Question 7.
What did you understand by reading the ticket?
Answer:
We understand that a day is deducted and the time is fixed backward by 1 day while crossing the IDL from west to east.

Try this:

Question 1.
Complete the following table to understand the time at different meridians: (In this activity we are not taking into consideration the rotation of the earth.)
Answer:

All places to east of Prime Meridian are ahead of GMT and all places to west of Prime Meridian are behind GMT.
Earth rotates on its axis and covers 1° longitude in 4 minutes.
As Sunil is moving 30° east, time will move ahead by 120 min, i.e. 2 hours (30° x 4 min.) and as Minal is moving 30° west, time will move backwards by 120 min. i.e. 2 hours.

Maharashtra Board Class 9 Geography Solutions Chapter 7 International Date Line 5

Question 1.
What is the day at 00 meridians at Greenwich after completing the table ‘A’?
Answer:
The day at 0° meridian at Greenwich after completing the table ‘A’ is Wednesday.

Question 2.
What is the day at 00 meridians at Greenwich after completing the table ‘B’?
Answer:
The day at 0° meridian at Greenwich after completing the table B is Friday.

Maharashtra Board Class 9 Geography Solutions Chapter 7 International Date Line 7

Question 3.
Though both were at the same place, why were they experiencing different days? How did this happen?
Answer:
Because Sunil was moving eastward, so time will move ahead whereas Meenal was moving westward, so time is moving backward.

Question 4.
How many days occurred while doing this activity? Name them.
Answer:
While doing this activity, 3 days came in reference as Wednesday, Thurday and Friday.

Question 5.
Which day is correct: Wednesday in Table ‘A’ or Friday in Table ‘B’? Why?
Answer:
None of the given days are correct. The correct day is Thursday after considering IDL.
Maharashtra Board Class 9 Geography Solutions Chapter 7 International Date Line 8
Explanation:
(i) When Sunil reached 180° meridian i.e. IDL, according to him it is Thursday midnight (24.00). When IDL is crossed from west to east we need to deduct a day (24 hrs.). Thus when 24 hrs are deducted from Thursday 24.00 (midnight) we get Thursday 00.00. So after crossing the IDL the day to be considered is Thursday i.e. the same day.

(ii) When Minal reached 180° meridian i.e. IDL, according to her it is Wednesday midnight (24.00). When IDL is crossed from east to west we need to add a day (24 hrs.). Thus when 24 hrs are added to Wednesday 24.00 (midnight) we get Thursday 24.00 (midnight). So after crossing the IDL the day to be considered is Thursday.

Give it a try:

Your are now aware of the changes required to be made while crossing the ¡DL. Now redo the activity given on Page 59. Tell us the changes that you will have to make while crossing the IDL i.e. 1800 meridian. Your travel will start on Sunday, 21st May 2016 at 10 a.m.
Maharashtra Board Class 9 Geography Solutions Chapter 7 International Date Line 9

Let’s Recall:

Question 1.
Which meridian is used to determine world standard Time (GMT)?
Answer:
World Standard Time (GMT) is determined using Prime Meridian at 0° longitude.

Question 2.
Which meridian determines Indian Standard Time (1ST)?
Answer:
82°30′ E is the standard meridian of India.

Question 3.
What is the time difference between the GMT and the IST?
Answer:
IST is 5hrs and 30 min ahead of GMT.

Class 9 Geography Chapter 7 International Date Line Additional Important Questions and Answers

Complete the Statements choosing correct option:

Question 1.
Man has studied the rotation speed, direction and shape of the earth and prepared the system.
(a) monometric
(b) chronometric
(c) topographic
(d) GIS
Answer:
(b) Chronometric

Question 2.
Earth rotates from
(a) north to south
(b) south to north
(c) east to west
(d) west to east
Answer:
(d) west to east

Question 3.
In terms of time the part of the earth is ahead of the part.
(a) northern, southern
(b) southern, northern
(c) eastern, western
(d) western, eastern
Answer:
(c) eastern, western

Question 4.
is reached after 12 hours from Prime Meridian
(a) 90° W
(b) 90° E
(c) 180°
(d)120°W
Answer:
(c) 180°

Question 5.
According to IDL, while traveling from east to west
(a) a day is added
(b) a day is deducted
(c) keep the same day
(d) None of these
Answer:
(a) a day is added

Question 6.
Many nations got together under the leadership of in 1884 and decided on International Date Line.
(a) Professor Davidson
(b) Professor Samuelson
(c) Professor Adam Smith
(d) Professor Richardson
Answer:
(a) Professor Davidson

Answer in one sentence:

Question 1.
If it is 12noon at the Prime Meridian then what will be the time at 60°E longitude?
Answer:
If its is 12noon at the Prime Meridian, then it will be 16.00hrs (4pm) at 60°E longitude.

Question 2.
Which part of the earth is ahead in terms of time?
Answer:
In terms of time the eastern part of the earth is ahead of the western part.

Question 3.
When was it decided to draw the International Date line?
Answer:
When representatives of many nations got together under the leadership of American professor Davidson in the year of 1884 they decided on the International Date line.

Question 4.
A new day starts on the earth in which Ocean?
Answer:
A new day starts in the Pacific Ocean on the earth.

The following table shows the days and time to welcome New Year in different countries and cities according to 1ST. Observe the table and answer the questions gives below:

Country-city	Day	Indian Time
England – London	Sunday	05.30
Japan – Tokyo	Saturday	20.30
USA-New York	Sunday	10.30
USA – Baker Island	Sunday	17.30
Australia – Sydney	Saturday	18.30
New Zealand – Auckland	Saturday	16.30
Samoa Island – Apia	Saturday	15.30
Tuvalu – Funafuti Island	Saturday	17.30

Question 1.
Which location was the first to welcome the New Year in the World? What day was it then?
Answer:
Samoa islands in Apia was the first to welcome the New Year in the world on Saturday.

Question 2.
Which location bid farewell to the year 2016, the last of all?
Answer:
Baker islands in USA was last to bid farewell to the year 2016.

Question 3.
On which day did that location welcome 2017?
Answer:
Baker islands in USA welcomed 2017 on Sunday.

Question 4.
What could be the reason behind the change in the day of Sydney and London?
Answer:
According to 1ST, India welcomed the New Year at 12 midnight on Saturday. Sydney being 5 hours and 30 minutes ahead of IST and has already welcomed the New year before India on Saturday itself. But London is 5 hours and 30 minutes behind IST will welcome the New Year the next day i.e. on Sunday.

9th Std Geography Questions And Answers:

Maharashtra Board Class 9 Geography Solutions Chapter 2 Endogenetic Movements

February 4, 2025January 3, 2025 by Prasanna

Balbharti Maharashtra State Board Class 9 Geography Solutions Chapter 2 Endogenetic Movements Notes, Textbook Exercise Important Questions and Answers.

Endogenetic Movements Class 9 Questions And Answers Maharashtra Board

Class 9 Geography Chapter 2 Endogenetic Movements Questions And Answers Maharashtra Board

Geography Class 9 Chapter 2 Question Answer Maharashtra Board

1. Tick in front of the correct option ✓

(a) On which of the following are slow movements in the earth’s interior dependent?
Landforms [ ]
Velocity [ ]
Direction [ ]
Answer:
Velocity

(b) When waves divert from each other, what do they create
Compression [ ]
Tension [ ]
Mountain [ ]
Answer:
Tension

(c) For the formation of a rift valley, which of the following processes should occur in the earth’s crust?
Compression [ ]
Tension [ ]
Weathering [ ]
Answer:
Tension

(d) Which of these is a fold mountain?
The Satpudas [ ]
The Himalayas [ ]
The Western Ghats [ ]
Answer:
The Himalayas

(e) The formation of extensive plateaus is a result of which type of movements?
Mountain-building [ ]
Continent-building [ ]
Horizontal [ ]
Answer:
Continent-building

2. Give geographical reasons.

(a) Buildings collapsed at the foothills of the Himalayas because of an earthquake. Before collapsing they were moving forward and backward.
Answer:

The seismic waves can be divided into primary, secondary and surface waves.
The primary waves are the first ones to reach the surface of the earth after the energy is emitted in the Earth’s interior.
Subjected to a ‘P’ wave, particles in the rock move in the direction of waves to and fro and therefore, these waves are also called forward-backward waves.
Thus, during an earthquake, the buildings at the foothills of the Himalayas moved forward and backward as they were first subjected to “P” waves.

(b) There is a difference in the formation of the Meghalaya Plateau and the Deccan Plateau.
Answer:

The Meghalaya plateau is formed due to slow movements (orogenic movements) whereas the Deccan Plateau is formed due to sudden movements (fissure volcano).
During the formation of the Meghalaya plateau, a part of the Earth’s crust in between two parallel faults was lifted forming a plateau whereas, the Deccan plateau was formed due to molten material coming out with the eruption spreading on both sides of the fissure.
Thus, there is a difference in the formation of the Meghalaya plateau and the Deccan plateau.

The plate boundaries are directly related to the areas of volcanoes.
Most of the volcanoes are located on the plate boundaries.
The part of the plate boundary which slides under the crust, results in the loss of material. Such boundaries are called plate consuming boundaries.
In areas where new material (magma) is coming up onto the Earth’s crust, they are called plate creating boundaries.
Both the processes result in earthquakes and volcanoes. Thus, most of the volcanoes are formed in the plate boundaries.

(d) The Barren Island is becoming conical in shape.
Answer:

Barren island which was considered a dormant volcano has become active since February 2017.
Mainly dust, smoke and mud are coming out of this eruption along with some lava.
During eruption, the lava is spread around the mouth of this vent, when it comes out.
As a result, a cone-shaped mountain starts forming.

Therefore Barren Island is becoming conical in shape.

(e) Volcanic eruptions can cause earthquakes.
Answer:

Generally, the movements in the Earth’s interior occur in the upper layer of the mantle
Tremendous energy is released by radioactive materials present here.
This leads to a sudden movement in form of volcanic eruptions where hot solid, liquid and gaseous materials are forcefully thrown out from the mantle of the Earth, onto the surface of the Earth.
This causes a lot of instability within the crust of the Earth which would also lead to the release of pressure in the form of seismic waves or tremors causing earthquakes.

3. Identify and name the internal movement.

(a) Tsunamis are generated in coastal areas.
Answer:
Sudden Movement

(b) The Himalayas are an example of fold mountains.
Answer:
Slow movement – Mountain Building Movements.

(d) Rift valley is formed because of faulting.
Answer:
The slow movement – Upward – Downward Movement.

4. Arrange the following statements in chronological order in which an earthquake occurs.

(a) The earth’s surface vibrates
Answer:
The plates suddenly move.

(b) The plates suddenly move.
Answer:
Due to the movements in the mantle compression goes on increasing.

(c) Due to the movements in the mantle, compression goes on increasing.
Answer:
Along the weak point (faultlines) rocks break apart.

(d) Along the weak points ( faultlines) rocks break apart.
Answer:
Stored energy is released in the form of seismic waves.

(e) Stored energy is released in the form of seismic waves.
Answer:
The earth’s surface vibrates.

5. Distinguish between

(a) Block Mountain and Fold Mountain
Answer:

Block Mountain	Fold Mountain
(i) When a part of the earth’s crust between two parallel faults is lifted a block mountain is formed.	(i) Because of the energy waves and pressure working towards each other, the layers of the soft rocks form folds leading to the formation of fold mountains.
(ii) Block mountains are formed due to tension.	(ii) Fold mountains are formed due to compression.
(iii) e.g. The Black forest mountains of Europe and the Meghalaya Plateau of India.	(iii) e.g. The Himalayas, the Aravalis, the Rockies, the Andes, the Alps

(b) Primary and Secondary Seismic Waves
Answer:

Primary Seismic Waves	Secondary Seismic waves
(i) Primary waves are the first one to reach the surface of the earth after the energy is emitted in the Earth’s interior.	(i) The waves which reach the Earth’s surface after the primary waves are called secondary waves.
(ii) Primary waves can travel through solid, liquid and gaseous medium.	(ii) Secondary waves can travel only through only solid medium.
(iii) While travelling through liquid medium, primary waves change their direction.	(iii) Secondary waves get absorbed as they enter the liquid medium.
(iv) The waves move to and fro in the direction of energy transfer.	(iv) These waves move up and down in the direction of energy transfer.

Earthquakes	Volcanoes
(i) Earthquake is the movement of the Earth’s crust.	A volcano is an opening in the Earth’s crust from which hot solid, liquid and gaseous materials are thrown out from the mantle of.
(ii) Nothing is ejected out during an earthquake.	During a volcanic eruption, ash, water vapor, various types of poisonous and inflammable gases, hot molten magma etc. is ejected from the earth’s interior.

6. Answer in brief
(a) Give reasons why an earthquake occurs.
Answer:

When the movements occur in the interior of the Earth, tremendous tension is created in the Earth’s crust.
When the tension goes beyond limits, the energy is released in the form of waves.
This results in the trembling of the earth’s surface, i.e. an earthquake occurs.

Following are the reasons for the occurrence of an earthquake:

Moving of the plates
Colliding of the plates
Plates sliding one below the other
Forming of fractures in rock layers, due to tension in the interior of the Earth.
Occurring of volcanic eruption

(b) Which type of movements have led to the formation of the major fold mountains in the world?
Answer:

Fold mountains are formed due to mountain-building (erogenic) movements.
Energy is transferred from the interior of the Earth. Because of these energy waves and pressure working towards each other and in horizontal direction, the layers of the soft rocks form folds.
If the pressure is very high, large scale folds are formed and their complexity increases.
As a result, the surface of the Earth gets uplifted and fold mountains are formed.
The Himalayas, the Aravalis, the Rockies, the Andes, the Alps are the major fold mountains of the world.

Through a seismogram, a graph showing movement of seismic waves (seismograph) can be generated.
After studying this graph, the magnitude of the earthquake is known.
The magnitude of the earthquake is measured with the help of a richter scale.
It is because of the primary waves that the buildings on the Earth’s surface move back and forth.
The buildings on the Earth’s surface move up and down because of the secondary waves. These are more destructive than the T’ waves leading to collapse of buildings.

(d) What are the effects of earthquakes on the earth’s surface and human life?
Answer:
Following are the effects of earthquakes:

Cracks/fractures develop on the ground.
These causes landslides which leads to sliding of rocks.
Sometimes the groundwater changes its course. For example, wells may get water, or may dry up.
Some areas get uplifted while some may subside.
Tsunamis are generated in oceans These waves can cause great loss of life and property in the coastal areas.
In snow-covered areas, avalanches may occur.
Buildings collapse and loss of life and property occurs.
Transportation routes get disrupted.
The communication system collapses.

(e) Explain the types of seismic waves.
Answer:
When the intension is released at the focus, the released energy travels in all directions. This energy comes towards the Earth’s surface in the form of waves. The seismic waves can be divided into primary, secondary and surface waves.
(i) Primary or ‘P’ waves:

These waves are first to reach the surface of the Earth, after the energy is emitted in the Earth’s interior. They travel at a very fast speed from the focus of the earthquake in radial direction.
The waves moves to and fro, therefore these waves are called forward-backward waves.
These waves can travel through all the three states – liquid, solid and gaseous.
While travelling through liquid medium, their direction gets changed. It is because of the primary waves that the buildings on the Earth’s surface move back and forth.

(ii) Secondary or ‘S’ waves :

The waves which reach the Earth’s surface after I the primary waves are called secondary waves. :
These waves also scatter in all directions from the focus of the earthquake.
Their velocity is less than ’P’ waves.
The particles lying in the way of these waves j move up and down in the direction of energy transfer.
These waves can travel only through the solid medium and they get absorbed as they enter the liquid medium.
The buildings on the Earth’s surface move up and down because of these waves. These are more destructive than ‘P waves.

(iii) Surface or ‘L’ waves :

These waves are generated after the main ’P’ and ‘S’ waves reach the epicenter.
They travel in the direction of the circumference of the Earth, along the crust and are highly destructive.

(f) Explain the types of volcanoes on the basis of the periodicity of eruption with examples.
Answer:
According to the periodicity of the volcanic eruptions, three types of volcanoes can be identified.
(i) Active Volcanoes –

If the volcanic eruptions are regular even in the present times, then such volcanoes are called active volcanoes.
E.g., Mt Fujiyama in Japan and Mt. Stromboli in the Mediterranean Sea.

(ii) Dormant Volcanoes –

When a volcano has not erupted since long, but may become active suddenly is called a dormant volcano.
E.g., Mt. Vesuvius in Italy, Mt. Katmai in Alaska and Barren Island, India.

(iii) Extinct volcanoes –

Those volcanoes which have not erupted in the past since long and are not likely to erupt in the future are called extinct volcanoes.
E.g., Mr. Kilimanjaro in Tanzania.

7. Show the epicenter, focus and the primary, secondary and surface waves of an earthquake with the help of a neat labeled diagram.
Answer:
Maharashtra Board Class 9 Geography Solutions Chapter 2 Endogenetic Movements 2

8. Show the following on a given outline map of the world.

(a) Mt. Kilimanjaro
(b) Mid-Atlantic Earthquake zone
(c) Mt. Fuji
(d) Krakatoa
(e) Mt. Vesuvius
Answer:
Maharashtra Board Class 9 Geography Solutions Chapter 2 Endogenetic Movements 1

Class 9 Geography Chapter 2 Endogenetic Movements Intext Questions and Answers

Can you tell?
Read the following news. Observe the photograph and answer the questions.
Maharashtra Board Class 9 Geography Solutions Chapter 2 Endogenetic Movements 3

Question 1.
What caused large-scale casualties?
Answer:
Calamity of earthquake led to large scale casualties.

Question 2.
What was the magnitude of the earthquake?
Answer:
The magnitude of the earthquake was 7.9 Richter scale.

Question 3.
Which country was the most affected because of this earthquake?
Answer:
Nepal was most affected because of this earthquake.

Question 4.
Where was the epicentre of the earthquake?
Answer:
Lamjung in Nepal was the epicentre of the earthquake.

Question 5.
Which are the other affected areas?
Answer:
Bihar, West Bengal and Uttar Pradesh in India as well as China, Bhutan, Pakistan and Bangladesh were affected by earthquake.

Question 6.
At what depth was the focus located?
Answer:
The focus of the earthquake was located at the depth of 11 km.

Question 7.
What kind of damage is seen because of the earthquake?
Answer:
Nearly 1500 people were killed and over 1000 people were injured in the disaster.

Question 8.
According to you, what could be the reason behind the earthquake?
Answer:
The sudden release of energy from the interior of the earth leads to earthquakes.

Question 9.
Have you ever experienced a similar earthquake? Discuss.
Answer:
Answers may vary.

Class 9 Geography Chapter 2 Endogenetic Movements Additional Important Questions and Answers

Complete the statements choosing the correct option from the bracket:

Question 1.
Richter scale is a unit of measuring the magnitude of a/an
(a) volcano
(b) creation of plate
(c) earthquake
(d) earth movement
Answer:
(c) earthquake

Question 2.
There are in all major plates on the Earth.
(a) five
(b) seven
(c) nine
(d) four
Answer:
(b) seven

Question 3.
Large scale and sudden release of energy in the interior of the Earth gives rise to Earth movements.
(a) slow
(b) sudden
(c) internal
(d) external
Answer:
(b) sudden

Question 4.
Earthquakes occur due to the movement of
(a) plates
(b) earth
(c) oceans
(d) land
Answer:
(a) plates

Question 5.
Earthquake is measured with the help of an instrument called a
(a) seismogram
(b) thermometer
(c) barometer
(d) hygrometer
Answer:
(a) seismogram

Question 6.
If lava is released through a vent, it is called a vent volcano.
(a) fissure
(b) central
(c) upper
(d) below
Answer:
(b) central

Question 7.
Kilimanjaro is a volcano.
(a) central type
(b) fissure type
(c) extinct type
(d) dormant type
Answer:
(a) central type

Question 8.
A tremendous amount of energy is given out by the radioactive elements in the
(a) crust
(b) core
(c) mantle
(d) sial
Answer:
(c) mantle

Question 9.
The movements that give rise to mountains are called movements.
(a) epiorogenic
(b) orogenic
(c) slow
(d) sudden
Answer:
(b) orogenic

Question 10.
When a portion of the crust between two parallel faults2 is raised up, it is called a mountain.
(a) block
(b) fold
(c) residual
(d) ancient
Answer:
(a) block

Question 11.
The area between two adjoining faults subsides, such area of subsidence is called
(a) rift valley
(b) block mountain
(c) fold mountain
(d) faulting
Answer:
(a) rift valley

Question 12.
Black Forest Mountain in Europe is a mountain.
(a) fold
(b) residual
(c) block
(d) ancient
Answer:
(c) block

Question 13.
The movements that give rise to continents are
(a) orogenic
(c) fold
(b) epeirogenic
(d) fault
Answer:
(b) epeirogenic

(Endogenetic Movements Class 9 Geography Chapter 2 )Tick in front of the correct option.

Question 1.
Which of these is a block mountain?
(a) Black forest mountain
(b) Alps
(c) Andes
Answer:
(a) Black forest mountain

Question 2.
Which type of volcano has eruptions regularly even during present times?
(a) Dormant
(b) Extinct
(c) Active
Answer:
(c) Active

Give one word for each of the following:

Question 1.
A volcano, where lava reaches the surface through a vent or a pipe.
Answer:
Central Vent Volcano

Question 2.
An instrument, which is used for recording earthquakes.
Answer:
Seismogram

Question 3.
The surface position immediately above the origin of an earthquake.
Answer:
Epicenter

Question 4.
An example of a volcanic plateau.
Answer:
Deccan Plateau.

Question 5.
An example of Conical volcanic mountains.
Answer:
Mt. Kilimanjaro

(Class 9 Geography Chapter 2 Endogenetic Movements Questions And Answers ) Answer in one sentence each.

Question 1.
What are Endogenetic processes?
Answer:
Endogenetic processes are processes that originate internally in the Earth’s surface. E.g. earthquakes, volcanoes, continent building, mountain building etc.

Question 2.
What is a Richter scale?
Answer:
It is a scale for expressing the magnitude of an earthquake.

Question 3.
What is a Focus or Hypocentre?
Answer:
The point below the Earth’s surface where energy is released during an earthquake is called the focus of the earthquake.

Question 4.
What are Primary Waves?
Answer:
The earthquake waves that reach the surface of the Earth first, immediately after the energy is released in the interior of the Earth, are called Primary waves.

Question 5.
What are Secondary Waves?
Answer:
The earthquake waves reporting at the surface after the primary waves are called the secondary waves.

Question 6.
What are Surface Waves?
Answer:
Primary and secondary waves affect the surface on reaching it. As a result a new set of waves gets generated at the surface. These waves are called surface waves.

Question 7.
What are Plates?
Answer:
The parts of varying sizes of the Earth’s crust floating on the upper portion of the mantle are called plates.

Question 8.
What do you mean by an Epicentre?
Answer:
The point located on the surface of the Earth nearest to the focus is called the epicenter of the earthquake.

Question 9.
Explain Orogenic Movements
Answer:
The slow movements in the interior of the Earth that give rise to mountains are called orogenic movements (mountain building movements).

Question 10.
What is Folding1?
Answer:
As energy moves through the interior of the Earth, soft rocks are subjected to pressure leading to creation of folds called folding.

Question 11.
Define Fault.
Answer:
The fracture line created in a rock due to the energy waves moving away from each other is called a fault.

Question 12.
What is a Block Mountain?
Answer:
A raised portion of the crust between two parallel faults is called a block mountain.

Question 13.
What is a Rift valley?
Answer:
The area of subsidence between two adjoining faults is called a rift valley.

Question 14.
Explain Epeirogenic Movements.
Answer:
The Earth’s slow movements that give rise to continents and extensive plateaus are called epeirogenic movements.

Question 15.
Explain the process of Volcanic Eruption.
Answer:
A process in which hot solid, liquid and gaseous materials are thrown out from the mantle of the earth onto the surface of the earth, is called volcanic eruption.

Identify and name the internal movements.

Question 1.
Dust, smoke and mud with some lava coming out of Barren Island.
Answer:
Sudden Movement

Distinguish between:

Question 1.
Seismic Focus and Epicentre
Answer:

Seismic Focus	Epicenter
(i) The point below the surface where energy is released during an earthquake is called the seismic focus of the earthquake.	(i) The place on the surface which is directly above the focus and closest to it is called the epicenter.
(ii) From the seismic focus, an energy wave radiates in all directions.	(ii) Seismic waves reach the epicenter first and foremost and so its intensity is the maximum at this point.

Question 2.
Central Type Volcano and Fissure Type Volcano
Answer:

Central Type Volcano		Fissure Type Volcano
(i)	Lava is released through a pipe-like vent, hence it is called central type volcano.	(i)	Lava is released through a number of fissures or cracks, hence it is called fissure type volcano.
(ii)	The ejected material gets settled near the mouth of the central vent, giving rise to conical hills.	(ii)	The ejected material spreads on either side of the fissures and forms volcanic plateaus.
(iii)	e.g. Mt. Fujiyama of Japan, Mt. Kilimanjaro in Tanzania.	(iii)	e.g. the Deccan plateau of India

Question 3.
Orogenic Movements and Epeirogenic Movements
Answer:

Orogenic Movements	Epeirogemic Movements
(i) The movements that give rise to mountains are called Orogenic Movements.	(i) The movements that give rise to continents are called Epeirogenic Movements.
(ii) They lead to the formation of Fold mountains, Block mountains and Rift valleys.	(ii) They lead to the formation of continents and extensive plateaus.

Question 4.
Slow Internal Movements and Sudden Internal Movements
Answer:

Slow Internal Movements	Sudden Internal Movements
(i) The movements in the interior of the earth that are caused by continuous and slow release of energy are called slow internal movements	(i) The movements in the interior of the earth that are caused by the sudden release of energy on a large scale are called sudden internal movements.
(ii) Slow internal movements give rise to mountains and continents.	(ii) Sudden internal movements lead to earthquakes and volcanic eruptions.

Make friends with Maps!
Maharashtra Board Class 9 Geography Solutions Chapter 2 Endogenetic Movements 4
Answer the following questions:

Question 1.
Examine the plate boundaries in the given map and write the names of the plates.
Answer:
North American Plate, South American Plate, Indo-Australian Plate, African Plate, Eurasian Plate, Pacific Plate, Antarctic Plate, Arabian Plate, Nazca Plate, Cocos Plate, Caribbean Plate, Scotia Plate, Arabian Plate and Somali Plate.

Question 2.
On which side of the continents of North and South America are the earthquake-prone zones located? Which mountains are located there?
Answer:
The earthquake-prone zone is located on the western side of North and South America. Rockies and Andes mountain ranges are located there.

Question 3.
In which mountainous zone in Asia does the earthquake-prone zone lie?
Answer:
The Himalayan mountainous zone of Asia is an earthquake-prone zone.

Question 4.
In which region are the volcanoes concentrated in Africa? What could be the reason?
Answer:
Volcanoes are concentrated in the eastern part of Africa along the Rift Valley region as this region is located on plate boundaries.

Question 5.
Correlate earthquake regions, distribution of volcanoes and plate boundaries.
Answer:
Plate boundaries are directly related to areas of earthquakes and volcanoes. Most of the volcanoes are located on the plate boundaries. Similarly, the earthquake zones are also seen in the border areas.

Give geographical reasons:

Question 1.
The secondary earthquake waves are very destructive.
Answer:

Due to secondary earthquake waves, the grains in the rocks move up and down, that is, perpendicular to the direction of the movement of the waves.
Therefore, secondary waves are very destructive.

Answer in brief:

Question 1.
Explain the types of volcanoes on the basis of their type of eruption, with examples.
Answer:
On the basis of the type of eruption, volcanoes can be divided into two types.
(i) Central-type or conical volcano:

During eruption, the molten magma comes out through a pipe-like vent from inside the Earth’s surface. The lava spreads around the mouth of this vent, when it comes out.
Asa result, cone-shaped mountains start forming and conical volcanic mountains are formed.
Mt. Fujiyama in Japan and Mt. Kilimanjaro in Tanzania are examples of central-type volcanoes and conical mountains.

(ii) Fissure-type volcano:

During eruption, when the magma comes out not from a single vent, but from many cracks (fissures), it is called fissure-type volcanic eruption.
The molten material coming out with the eruption spreads on both the sides of the fissure. ;
As a result, volcanic plateaus are formed.
The Deccan Plateau of India has also been formed due to such a type of volcanic eruption.

Question 2.
Describe the changes that take place on the surface of the Earth, due to the movements taking place in the interior of the Earth.
Answer:
The changes taking place on the surface of the Earth, due to the internal movements of the Earth are as follows:

The soft rocks are subjected to pressure due to the energy released in the interior of the Earth. This leads to the development of folds.
If the pressure is very high, large scale folds are formed, and their complexity increases. As a result, the surface of the Earth gets uplifted and fold mountains are formed.
When the energy waves move away from each other, tension in the rock is developed. In hard rocks, the tension leads to faulting, when a portion between two parallel faults is raised up, block mountains are created.
Sometimes, when the portion between two parallel faults subsides, a rift valley is created.
Sometimes, an extensive portion is raised to form a continent or an extensive plateau.

Question 3.
How are continents and extensive plateaus formed?
Answer:

The epeirogenic movements are responsible for the formation of continents.
Slow movements occur towards the centre or from the Earth’s centre towards the Earth’s crust.
Because of these movements, a vast part of the Earth’s crust is uplifted or gets subsided.
When the part of the Earth’s crust is uplifted above the sea mean level, continents are formed.
Therefore, these movements are called continent-building movements.
Extensive plateaus can also be formed because of such movements.

Question 4.
What are the effects of volcanoes?
Answer:
The following are the effects of volcanoes:

Loss of life and property.
Sometimes tsunamis get generated due to volcanic eruptions occurring below ocean floors.
Dust, smoke, ash, gases, water vapour, etc. remain in the atmosphere for a long time.
This may create an imbalance in the environment.
Land may become fertile due to volcanic ash.
Many minerals are found near the earth’s surface because of lava.
New land is formed due to volcanic eruption or at times, an island may even disappear.
Lakes are formed at the mouth of the craters of dead volcanoes when rainwater accumulates in them.

Question 5.
Explain the process of the formation of Block mountains.
Answer:

Because of internal movements, horizontal waves moving away from each other are formed.
This causes tension on the layers of rocks leading to the formation of fractures in the rocks called as faults.
Similarly, waves coming towards each other in hard rocks also form faults due to compression.
When a part of the earth’s crust in between two parallel faults is lifted, it looks like a block. Such a landform is called as a Block mountain.

Question 6.
Explain the process of formation of Rift valley.
Answer:

When horizontal movements on the earth’s surface act in opposite direction, it causes tension on the rocks in the earth’s crust.
When tension increases, fractures develop in the rocks leading to the formation of faults.
Consequently, rocks on both the ends slide and the continuity in the layers of rocks is not found.
Sometimes, two fractures develop side-by-side in the earth’s crust and land in between the two fractures subsides. This subsided deep part is called the rift valley.

9th Std Geography Questions And Answers:

Std 9 Geography Chapter 6 Question Answer Maharashtra Board

February 4, 2025January 3, 2025 by Prasanna

Balbharti Maharashtra State Board Class 9 Geography Solutions Chapter 6 Properties of Sea Water Notes, Textbook Exercise Important Questions and Answers.

Properties of Sea Water Class 9 Questions And Answers Maharashtra Board

Class 9 Geography Chapter 6 Properties of Sea Water Questions And Answers Maharashtra Board

Geography Class 9 Chapter 6 Question Answer Maharashtra Board

1. Tick the correct box according to the salinity of the ocean water ✓

Maharashtra Board Class 9 Geography Solutions Chapter 6 Properties of Sea Water 1
Answer:
(a) Low
(b) Low
(c) High
(d) High
(e) Low
(f) High.

2. Give reasons.

(a) Salinity is low in the land-locked Baltic Sea.
Answer:

The Baltic Sea lies in the temperate region.
In temperate regions, the sunrays are slanting and therefore, the temperatures are lower.
The supply of fresh water is also more, as numerous rivers empty their waters into the Baltic sea.
Therefore, in spite of being landlocked, due to low rate of evaporation and ample supply of fresh water, the salinity of the Baltic Sea is low.

(b) There is higher salinity in the northern Red Sea while lower in the southern.
Answer:

The Red Sea is one of the saltiest bodies of water in the world, owing to high evaporation.
The salinity is 36%o in the southern part because of the effect of the Gulf of Aden.
It reaches 41 %o in the northern part, owing mainly to the Gulf of Suez and the high evaporation as well as very little precipitation.
Hence, there is more salinity in the northern Red Sea while lesser in the south.

The salinity of the oceans depends on factors like rate of evaporation and supply of fresh water.
In Oceans where rate of evaporation is more than the supply of fresh water, the salinity is higher.
In Oceans where supply of freshwater exceeds the rate of evaporation, salinity is low.
Salinity is not affected much in areas where supply of freshwater and the evaporation of water is low.
Thus, oceans located on the same latitude do not have the same salinity.

(d) With increasing depth, the temperature of sea water decreases to a certain limit.
Answer:
With increasing depth, the temperature of sea water decreases to a certain limit because –

While most of the sunrays radiate back from the surface of the sea, some of them penetrate to certain depths in the water.
As a result, the intensity of sunrays decreases with the increasing depth.
The temperature decreases up to 2000m depth.
After 2000m, the temperature of the seawater is uniform everywhere.

(e) There are more salt-pans on the Western coast of India than its eastern coast.
Answer:

The Arabian Sea lies lying to the west and Bay of Bengal lies to the east of India.
Many large peninsular rivers drain their waters in the Bay of Bengal and on the contrary, only small seasonal coastal rivers drain in the Arabian Sea.
Hence, the salinity of the eastern coast is 34%, while it is 35% in the Arabian Sea.
Thus, there are more salt-pans on the Western coast of India than its Eastern coast.

(f) Salinity increases in the mid-latitudinal zones.
Answer:

Mid-latitudinal zones lies between 25° to 35° north and south of the equator.
In this zone, the rainfall is less and the supply of fresh water from rivers is also low.
This region experiences high-temperature conditions which are marked by the presence of hot deserts of the world. These high-temperature conditions lead to a high rate of evaporation.
Thus, the salinity of the seas is found to be higher in mid-latitudinal zones.

3. Answer the following questions.

(a) What are the factors affecting the salinity of the sea water?
Answer:

The uneven distribution of temperature on earth and uneven supply of freshwater affects the salinity of seawater.
In the tropical zone, temperature is higher. Rate of evaporation is also higher and therefore, the salinity is higher.
Around 5° N and S of the equator, in the equatorial calm belt, the sky is cloudy for a long period of time and convectional rainfall occurs every day.
Large rivers like Congo and Amazon in the equatorial regions meet the sea. Therefore, supply of freshwater is abundant, too. But because of higher temperatures, rate of evaporation is more and therefore, the seas in these areas are more saline.
In mid-latitudinal zones (25° to 35° N and S), rainfall is lesser and the supply of freshwater from rivers is also low. This zone has the hot deserts of the world. Thus, the salinity of the seas is found to be higher here.
In temperate regions, the sunrays are slanting and therefore, the temperatures are lower. Because of the melting of the snow, the supply of water is also more, and therefore, in this zone, salinity decreases with increasing latitudes.
In the polar areas, temperatures are very low. Evaporation is also very less in polar areas. So, salinity is low.
Landlocked seas have higher salinity than open seas as the rate of evaporation is more. There is a lack of supply of fresh water from large rivers. Thus, there is a difference in the salinities of open and closed seas.

(b) Explain the distribution of salinity around the Tropic of Cancer and tropic of Capricorn.
Answer:

The uneven distribution of temperature on earth, and uneven supply of freshwater affects the salinity of sea water.
Region, between the Tropic of Cancer and Tropic of Capricorn is called as the Tropical zone.
In the tropical zone, temperature is higher.
Hence, the rate of evaporation is also higher, and therefore, salinity is higher.

Temperature is a major property of the sea water.
Sea water upto the depth of 500m is called as surface water. The surface temperature of the sea water is not uniform everywhere. This is dependent on different factors. .
Latitudinally, the surface temperature of the seawater decreases from the equatorial areas towards the poles.
The average temperature in equatorial areas is around 25° C, while it is about 2° C near the poles.
Besides this, cyclones, rainfall, sea waves, ocean currents, salinity, pollution, convectional currents, and seasons also affect the surface temperature.
Regions where cold ocean currents flow, the surface temperature of ocean water is less, while the regions where the warm currents move, the temperature increase.

(d) Explain the changes occurring in the temperature of sea water according to the depth.
Answer:

While most of the sunrays radiate back from the surface of the sea, some of them penetrate to certain depths in the water.
As a result, the intensity of sunrays decreases with the increasing depth.
The temperature decreases up to 2000m depth.
After 2000m, the temperature of the seawater is uniform everywhere.
It is around 4°C everywhere from the equatorial regions to the polar areas.
Temperature reduces only up to 4° C according to depth, and therefore, the water at greater depths does not freeze.
The temperature of the seawater changes rapidly with depth at the equatorial areas. The difference in temperature is lesser in polar areas.
There is also a difference in open seas and landlocked seas. In low latitudes, because the salinity of the landlocked seas is more, the temperature of the landlocked seas is higher than the open seas.

(e) Name the factors affecting salinity.
Answer:
Due to the sun’s heat, evaporation happens at a faster rate. Evaporated water turns into water vapour and reduces in quantity. But amount of salt remains the same in the remaining water and therefore the salinity of water increases.

In seas where the rate of evaporation is high than the supply of fresh water, salinity is high.
In seas where the supply of freshwater exceeds the rate of evaporation, salinity is low.
Salinity is not affected much in seas where both the supply of freshwater and evaporation of water is low.

4. Explain how temperature affects the following.

(a) the density of sea water
Answer:

If temperature reduces, density of water increases.
Hence, cold water is denser than hot water.

(b) the salinity of sea water
Answer:

If the salinity of water is high, the density of water increases.

Activity:

Complete the table showing the salinity of open and land-locked seas.
Maharashtra Board Class 9 Geography Solutions Chapter 6 Properties of Sea Water 3
Answer:

Class 9 Geography Chapter 6 Properties of Sea Water Intext Questions and Answers

Observe the following Map and answer the questions:
Maharashtra Board Class 9 Geography Solutions Chapter 6 Properties of Sea Water 4

Question 1.
What is the salinity around the tropics?
Answer:
The salinity around the tropics is 36%o.

Question 2.
Which region has the least salinity?
Answer:
The Bay of Bengal has the least salinity of 32%o.

Question 3.
Which ocean has salinity more than 37%o?
Answer:
Atlantic ocean has salinity of more than 37%o.

Question 4.
What are the reasons of differences in salinity on a global level?
Answer:
The uneven distribution of temperature on earth, and uneven supply of freshwater, etc. are the reasons for differences in salinity on a global level.

Observe the Graph and answer the questions:
Maharashtra Board Class 9 Geography Solutions Chapter 6 Properties of Sea Water 5

Question 1.
What is the maximum temperature of seawater in equatorial areas? How much is this temperature at a depth of 500 m?
Answer:
The maximum temperature of sea water in equatorial areas is 18° C. The temperature at the depth of 500 m is 11° C.

Question 2.
What is the temperature of seawater at the sea level in the mid-latitudes?
Answer:
The temperature of seawater at the sea level in the mid-latitudes is 14° C approximately.

Question 3.
How much has this temperature changed at 1500 m depth?
Answer:
The temperature is about 5° C at the depth of 1500 m. Thus the temperature of sea water at mid-latitudes has changed from 14°C at the sea level to about 5°C at the depth of 1500 m i.e. temperature has changed (reduced) by 9°C.

Question 4.
What does the thermal graph for the high latitude say? What is its temperature at 500, 1000 and 1500 m depths?
Answer:
In high latitudes the temperature of sea water at all depths remains constant at 4° C.

Question 5.
After what depth does the seawater temperature remain stable everywhere?
Answer:
After 2000 m, the temperature of the sea water is uniform everywhere.

Maharashtra Board Class 9 Geography Solutions Chapter 6 Properties of Sea Water 6

Question 6.
With increasing depth, what decreases: temperature, salinity or density?
Answer:
Temperature and salinity decreases with increasing depth.

Question 7.
After what depth does the change in these factor become almost zero?
Answer:
After the depth of 1000 m there is no change in all these factors.

Question 8.
Till what depth is the change in these factors higher?
Answer:
The higher change can be seen up to a depth of about 500m.

Question 9.
Explain the correlation between all the three factors.
Answer:
If the temperature is less, density is more. If the salinity is less, then density is also less. However temperature affects the density more as compared to the salinity. If the temperature is less, then the density is more despite less salinity.

Let’s Recall.

Question 1.
Which is the largest water storage of the world?
Answer:
Oceans are the largest water storage of the world.

Question 2.
Why is the seawater salty?
Answer:

Salt in the ocean comes from rocks on land.
Rivers carry dissolved salts to the ocean.
Water evaporates from the oceans to fall again as rain and to feed the rivers, but the salts remain in the ocean.

Question 3.
What are the reasons for high salinity in the oceans?
Answer:
High rate of evaporation and low supply of fresh water leads to high salinity in the oceans:

Question 4.
How can we obtain the salts from the ocean water?
Answer:

Sea water contains a large amount of common salt and the salts of other metals dissolved in it.
Near the sea-shore, the sea water is collected in shallow pits (salt pans) and allowed to evaporate in the sunshine.
In a few days, the water evaporates, leaving behind salt.
The salt so obtained is collected and transported to factories, where it is purified and packed for consumption.

Question 5.
What is the use of the salts in the oceans to us?
Answer:

The salts is used in the food we eat.
It is used for making various chemicals and medicines.
Salt is also used to preserve things for longer periods. It is also used in ice factories.

Can You Tell?

Question 1.
What is the difference in the temperatures of the land and the sea?
Answer:
During the daytime land is hotter than the sea whereas, during the night time land is cooler than the sea.

Question 2.
What would be the difference in the temperature of the seawater from the equatorial region to the polar areas?
Answer:
Latitudinally, the surface temperature of the seawater decreases from the equatorial areas towards the poles. The average temperature in equatorial areas is around 25° C while it is about 2° C near the poles.

Think about it.

Question 1.
If you think about India there is the Arabian sea to the west and the Bay of Bengal to the east. The salinity of the eastern coast is 34%o while it is 35%o in the Arabian sea. What could be the reason of higher salinity in the western coastal region?
Answer:
Many large peninsular rivers drain their waters in the Bay of Bengal and on the contrary only small seasonal coastal rivers drain in the Arabian sea. Hence the salinity of Arabian sea is more than the Bay of Bengal.

Try this.

Question 1.
In which container has the water increased or decreased?
Answer:

The water has increased in the container which is in the classroom in which freshwater was added.
The water has decreased in the container which was kept in the sun outside.

Question 2.
What could be the reasons behind the decrease or increase?
Answer:

Since freshwater was added to one of the containers in the classroom the water level increased.
The water has decreased in the container which was kept outside in the sun due to evaporation.

Question 3.
What could be the reason behind the low and high salinity of the water in the container?
Answer:

In the container which as kept outside in the sun, due to high rate of evaporation, the salinity is high.
As we kept on adding fresh water to the container kept in the classroom the salinity is low.

Class 9 Geography Chapter 6 Properties of Sea Water Additional Important Questions and Answers

Select the correct option:

Question 1.
The average temperature in equatorial areas is
(a) 25° C
(b) 35° C
(c) 15° C
(d) 5° C
Answer:
(a) 25°C

Question 2.
The average temperature in mid-latitudes is
(a) 25° C
(b) 10° C
(c) 16° C
(d) 5° C
Answer:
(c) 16°C

Question 3.
The average temperature near poles is about
(a) 10° C
(b) 20° C
(c) 15° C
(d) 2° C
Answer:
(d) 2°C

Question 4.
With the increasing depth of sea, the intensity of sunrays
(a) increases
(b) decreases
(c) remains constant
(d) is uneven
Answer:
(b) decreases

Question 5.
Seawater upto the depth of 500m is called
(a) ground water
(b) surface water
(c) deep water
(d) saline water
Answer:
(b) surface water

Question 6.
ocean is the most saline ocean in the world.
(a) Pacific
(b) Arctic
(c) Indian
(d) Atlantic
Answer:
(d) Atlantic

Question 7.
The sea lying on the border of Israel and Jordan has a salinity of %o.
(a) 37
(b) 50
(c) 256
(d) 332
Answer:
(d) 332

Question 8.
The buoyancy of the sea water increases because of its
(a) evaporation
(b) salinity
(c) density
(d) high temperature
Answer:
(b) salinity

Question 9.
has an altitude of – 400m.
(a) Baltic Sea
(b) Arabian Sea
(c) Dead Sea
(d) the Mediterranean Sea
Answer:
(c) Dead sea

Question 10.
act as temperature controllers at a global level.
(a) Ocean currents
(b) Sea breeze
(c) Land breeze
(d) Trade winds
Answer:
(a) Ocean currents

Question 11.
is a major porperty of the sea water.
(a) Temperature
(b) Uniform salinity
(c) Buoyancy
(d) Equal Density
Answer:
(a) Temperature

Question 12.
have higher salinity than open seas.
(a) Equatorial seas
(b) Landlocked seas
(c) Freshwater lakes
(d) Seas in polar regions
Answer:
(b) landlocked seas

Question 13.
Temperature decreases upto depth.
(a) 500 m
(b) 1000 m
(c) 1500 m
(d) 2000 m
Answer:
(d) 2000m

Question 14.
In regions where cold currents flow, the surface temperature of ocean water is
(a) high
(b) less
(c) uniform
(d) uneven
Answer:
(b) less

Question 15.
Temperature of seawater changes rapidly with depth in areas.
(a) equatorial
(b) mid latitudinal
(c) temperate
(d) polar
Answer:
(a) equatorial

Question 16.
In seas where the rate of evaporation is than the supply of fresh water, salinity is high.
(a) less
(b) high
(c) same
(d) low
Answer:
(b) high

Question 17.
The salinity of Bay of Bengal is than that of Arabian sea.
(a) less
(b) more
(c) same
(d) equal
Answer:
(a) less

Question 18.
In areas the salinity of sea water is low.
(a) equatorial
(b) mid-latitudinal
(c) temperate
(d) polar
Answer:
(d) polar

Question 19.
The salinity of Battic sea is %.
(a) 332
(b) 32
(c) 37
(d) 7
Answer:
(d) 7

Match the Column:

Column A	Column B
(1) Equatorial areas (2) Mid-latitudinal areas (3) Temperate regions	(a) Salinity of 332%o (b) Slanting sunrays, melting of snow (c) Cloudy sky and convectional rainfall (d) Hot deserts

Answer:
(1-c),
(2- d),
(3 – b)

Answer in one sentence:

Question 1.
What is the major property of seawater?
Answer:
Temperature is a major property of seawater.

Question 2.
What is the average surface temperature of seawater in equatorial areas, mid-latitudes & poles?
Answer:
The average surface temperature of seawater is equatorial areas is around 25°C in mid-latitude it is around 16°C & 2°C near the poles.

Question 3.
After what depth is the seawater temperature uniform everywhere?
Answer:
After 2000m, the temperature of seawater is uniform everywhere

Question 4.
Name the instruments used to measure salinity?
Answer:
Hydrometer, Refractometer and salinometer are used to measure salinity.

Question 5.
Which is the most saline ocean?
Answer:
The Atlantic ocean is the most saline ocean.

Give geographical reasons:

Question 1.
The climate of the earth gets affected by ocean currents.
Answer:

The ocean currents are generated because of the difference in the properties of seawater.
They act as temperature controllers at the global level.
The distribution of temperature gets controlled due to the ocean currents.
Thus, the climate of the earth gets affected by ocean currents.

Question 2.
Dead Sea has a salinity of 332%0.
Answer:

The sea lying on the border of Israel and Jordan has a salinity of 332%0.
The average salinity of ocean is 35%o.
Jordan is the only large river meeting this sea.
Low rainfall, low supply of freshwater and high evaporation is the reason of high salinity.

Question 3.
The surface temperature of the sea is not uniform everywhere.
Answer:

The surface temperature of sea water is not uniform everywhere and it changes with latitudes.
The surface temperature of the seawater decreases from the equatorial areas towards the poles.
The average temperature in equatorial areas is around 25° C, it is 16° C in mid-latitudes while it is about 2° C near the poles.
Besides this, cyclones, rainfall, sea waves, ocean currents, salinity, pollution, convergence flow, seasons, etc. also affect the surface temperature.
Thus the surface temperature of the sea is not uniform everywhere.

Question 4.
The seas in equatorial calm belt are more saline.
Answer:

Around 5° N and S of the equator, in the equatorial calm belt, the sky is cloudy for a long period of time and convectional rainfall occurs every day.
Large rivers like Congo and Amazon in the equatorial regions meet the sea.
Therefore, supply of freshwater abundant too.
But because of higher temperatures, rate of evaporation is more and therefore, the seas in these areas are more saline.

Explain

Question 1.
Factors affecting surface water temperature
Answer:

Temperature is a major property of the seawater. The surface temperature of the seawater is not uniform everywhere. This is dependent on different factors.
Latitudinally, the surface temperature of the seawater decreases from the equatorial areas towards the poles.
Besides this, cyclones, rainfall, sea waves, ocean currents, salinity, pollution, convergence flow and seasons also affect the surface temperature.
Regions where cold ocean currents flow, the surface temperature of ocean water is less. The regions where the warm currents move, the temperature increase.

Question 2.
Density of sea water
Answer:

Temperature and salinity are the two properties of sea water that control the density of the sea water.
If temperature reduces, density of water increases.
Cold water is denser, and so is saline water.
As compared to salinity, temperature affects the density more. Hence, sometimes, more saline water has lower temperature at the surface.
Sea water having higher temperature and low salinity, can have lower density.

Question 3.
Measurement of salinity of sea water.
Answer:

The weight of all dissolved salts in water in ratio of parts per thousand of water is called the salinity of seawater.
For example, if the weight of dissolved salts in 1000g (1 kg) of seawater is 40g, then the salinity is 40%o i.e. 40 per thousand parts.
Hydrometer, refractometer and salinometer are also used to measure salinity.

Question 4.
Factors affecting salinity of sea water.
Answer:

Latitudes	Temperature / Rate of evaporation	Supply of fresh water	Salinity
Tropical Zone 5°N – 5°Sof equator	High	Abundant from (River Congo / Amazon)	High
Midlatitudes (25° – 35° N and S)	High (hot desert are found here)	low	High
Temperate regions	Temperature is lower due to slanting sunrays	The supply of water is more due to melting snow	low
Polar regions	Very low	low	low

9th Std Geography Questions And Answers:

Problem Set 7 Algebra 9th Standard Maths Part 1 Chapter 7 Statistics Solutions Maharashtra Board

December 11, 2024December 6, 2024 by Prasanna

Balbharti Maharashtra State Board Class 9 Maths Solutions covers the Problem Set 7 Algebra 9th Class Maths Part 1 Answers Solutions Chapter 7 Statistics.

9th Standard Maths 1 Problem Set 7 Chapter 7 Statistics Textbook Answers Maharashtra Board

Class 9 Maths Part 1 Problem Set 7 Chapter 7 Statistics Questions With Answers Maharashtra Board

Question 1.
Write the correct alternative answer for each of the following questions.

i. Which of the following data is not primary ?
(A) By visiting a certain class, gathering information about attendance of students.
(B) By actual visit to homes, to find number of family members.
(C) To get information regarding plantation of soyabean done by each farmer from the village Talathi.
(D) Review the cleanliness status of canals by actually visiting them.
Answer:
(C) To get information regarding plantation of soyabean done by each farmer from the village Talathi.

ii. What is the upper class limit for the class 25 – 35?
(A) 25
(B) 35
(C) 60
(D) 30
Answer:
(B) 35

iii. What is the class-mark of class 25 – 35?
(A) 25
(B) 35
(C) 60
(D) 30
Answer:
(D) 30

iv. If the classes are 0 – 10, 10 – 20, 20 – 30, …, then in which class should the observation 10 be included?
(A) 0 – 10
(B) 10 – 20
(C) 0 – 10 and 10-20 in these 2 classes
(D) 20 – 30
Answer:
(B) 10 – 20

v. If \(\overline { x }\) is the mean of x₁, x₂, ……. , x_n and \(\overline { y }\) is the mean of y₁, y₂, ….. y_n and \(\overline { z }\) is the mean of x₁,x₂, …… , x_n , y₁, y₂, …. y_n , then z = ?
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Problem Set 7 1
Answer:
x₁, x₂, x₃, ……. , x_n
∴ \(\overline{x}=\frac{\sum x}{\mathrm{n}}\)
∴ n\(\overline{x}\) = ∑x
Similarly, n\(\overline{y}\) = ∑y
Now,

\(\text { (A) } \frac{\overline{x}+\overline{y}}{2}\)

vi. The mean of five numbers is 50, out of which mean of 4 numbers is 46, find the 5th number.
(A) 4
(B) 20
(C) 434
(D) 66
Answer:
5^th number = Sum of five numbers – Sum of four numbers
= (5 x 50) – (4 x 46)
= 250 – 184
= 66
(D) 66

vii. Mean of 100 observations is 40. The 9th observation is 30. If this is replaced by 70 keeping all other observations same, find the new mean.
(A) 40.6
(B) 40.4
(C) 40.3
(D) 40.7
Answer:
New mean = \(\frac { 4000-30+70 }{ 100 }\)
= 40.4
(B) 40.4

viii. What is the mode of 19, 19, 15, 20, 25, 15, 20, 15?
(A) 15
(B) 20
(C) 19
(D) 25
Answer:
(A) 15

ix. What is the median of 7, 10, 7, 5, 9, 10 ?
(A) 7
(B) 9
(C) 8
(D) 10
Answer:
(C) 8

x. From following table, what is the cumulative frequency of less than type for the class 30 – 40?
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Problem Set 7 3
(A) 13
(B) 15
(C) 35
(D) 22
Answer:
Cumulative frequency of less than type for the class 30 – 40 = 7 + 3 + 12 + 13 = 35
(C) 35

Question 2.
The mean salary of 20 workers is ₹10,250. If the salary of office superintendent is added, the mean will increase by ₹ 750. Find the salary of the office superintendent.
Solution:
\( \text { Mean }=\frac{\text { The sum of all observations }}{\text { Total number of observations }}\)
∴ The sum of all observations = Mean x Total number of observations
The mean salary of 20 workers is ₹ 10,250.
∴ Sum of the salaries of 20 workers
= 20 x 10,250
= ₹ 2,05,000 …(i)
If the superintendent’s salary is added, then mean increases by 750
new mean = 10, 250 + 750 = 11,000
Total number of people after adding superintendent = 20 + 1 = 21
∴ Sum of the salaries including the superintendent’s salary = 21 x 11,000 = ₹ 2,31,000 …(ii)
∴ Superintendent salary = sum of the salaries including superintendent’s salary – sum of salaries of 20 workers
= 2, 31,00 – 2,05,000 …[From (i) and (ii)]
= 26,000
∴ The salary of the office superintendent is ₹ 26,000.

Question 3.
The mean of nine numbers is 77. If one more number is added to it, then the mean increases by 5. Find the number added in the data.
Solution:
∴ \( \text { Mean }=\frac{\text { The sum of all observations }}{\text { Total number of observations }}\)
∴ The sum of all observations = Mean x Total number of observations mean of nine numbers is 77
∴ sum of 9 numbers = 11 x 9 = 693 …(i)
If one more number is added, then mean increases by 5
mean of 10 numbers = 77 + 5 = 82
∴ sum of the 10 numbers = 82 x 10 = 820 …(ii)
∴ Number added = sum of the 10 numbers – sum of the 9 numbers = 820 – 693 … [From (i) and (ii)]
= 127
∴ The number added in the data is 127.

Question 4.
The monthly maximum temperature of a city is given in degree Celsius in the following data. By taking suitable classes, prepare the grouped frequency distribution table
29.2, 29.0, 28.1, 28.5, 32.9, 29.2, 34.2, 36.8, 32.0, 31.0, 30.5, 30.0, 33, 32.5, 35.5, 34.0, 32.9, 31.5, 30.3, 31.4, 30.3, 34.7, 35.0, 32.5, 33.5.29.0. 29.5.29.9.33.2.30.2
From the table, answer the following questions.
i. For how many days the maximum temperature was less than 34°C?
ii. For how many days the maximum temperature was 34°C or more than 34°C?
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Problem Set 7 4
i. Number of days for which the maximum temperature was less than 34°C
= 8 + 8 + 8 = 24
ii. Number of days for which the maximum temperature was 34°C or more than 34°C
= 5 + 1 = 6

Question 5.
If the mean of the following data is 20.2, then find the value of p.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Problem Set 7 5
Solution:

∴ 20.2 (30 + p) = 610 + 20p
∴ 606 + 20.2p = 610 + 20p
∴ 20.2p – 20p = 610 – 606
∴ 0.2p = 4
∴ p = \(\frac { 4 }{ 0.2 }\) = \(\frac { 40 }{ 2 }\) = 20
∴ p = 20

Question 6.
There are 68 students of 9th standard from Model Highschool, Nandpur. They have scored following marks out of 80, in written exam of mathematics.
70, 50, 60, 66, 45, 46, 38, 30, 40, 47, 56, 68,
80, 79, 39, 43, 57, 61, 51, 32, 42, 43, 75, 43,
36, 37, 61, 71, 32, 40, 45, 32, 36, 42, 43, 55,
56, 62, 66, 72, 73, 78, 36, 46, 47, 52, 68, 78,
80, 49, 59, 69, 65, 35, 46, 56, 57, 60, 36, 37,
45, 42, 70, 37,45, 66, 56, 47
By taking classes 30 – 40, 40 – 50, …. prepare the less than type cumulative frequency table. Using the table, answer the following questions:

i. How many students have scored marks less than 80?
ii. How many students have scored marks less than 40?
iii. How many students have scored marks less than 60?
Solution:
Class
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Problem Set 7 7
i. 66 students have scored marks less than 80.
ii. 14 students have scored marks less than 40.
iii. 45 students have scored marks less than 60.

Question 7.
By using data in example (6), and taking classes 30 – 40, 40 – 50,… prepare equal to or more than type cumulative frequency table and answer the following questions based on it.
i. How many students have scored marks 70 or more than 70?
ii. How many students have scored marks 30 or more than 30?
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Problem Set 7 8
i. 11 students have scored marks 70 or more than 70.
ii. 68 students have scored marks 30 or more than 30.

Question 8.
There are 10 observations arranged in ascending order as given below.
45, 47, 50, 52, JC, JC + 2, 60, 62, 63, 74. The median of these observations is 53.
Find the value of JC. Also find the mean and the mode of the data.
Solution:
i. Given data in ascending order:
45,47, 50, 52, x, JC+2, 60, 62, 63, 74.
∴ Number of observations (n) = 10 (i.e., even)
∴ Median is the average of middle two observations
Here, the 5th and 6th numbers are in the middle position.
∴ Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Problem Set 7 9
∴ 106 = 2x + 2
∴ 106 – 2 = 2x
∴ 104 = 2x
∴ x = 52
∴ The given data becomes:
45, 47, 50, 52, 52, 54, 60, 62, 63, 74.

Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Problem Set 7 10
∴ The mean of the given data is 55.9.

iii. Given data in ascending order:
45, 47, 50, 52, 52, 54, 60, 62, 63, 74.
∴ The observation repeated maximum number of times = 52
∴ The mode of the given data is 52.

Maharashtra Board Class 9 Maths Chapter 7 Statistics Problem Set 7 Intext Questions and Activities

Question 1.
To show following information diagrammatically, which type of bar- diagram is suitable?
i. Literacy percentage of four villages.
ii. The expenses of a family on various items.
iii. The numbers of girls and boys in each of five divisions.
iv. The number of people visiting a science exhibition on each of three days.
v. The maximum and minimum temperature of your town during the months from January to June.
vi. While driving a two-wheeler, number of people wearing helmets and not wearing helmet in 100 families.
(Textbook pg. no. 112)
Solution:
i. Percentage bar diagram
ii. Sub-divided bar diagram
iii. Sub-divided bar diagram
iv. Sub-divided bar diagram
v. Sub-divided bar diagram
vi. Sub-divided bar diagram

Question 2.
You gather information for several reasons. Take a few examples and discuss whether the data is primary or secondary.
(Textbook pg. no, 113)
[Students should attempt the above activity on their own.]

Class 9 Maths Digest

Practice Set 7.5 Algebra 9th Standard Maths Part 1 Chapter 7 Statistics Solutions Maharashtra Board

December 11, 2024December 6, 2024 by Prasanna

Balbharti Maharashtra State Board Class 9 Maths Solutions covers the Practice Set 7.5 Algebra 9th Class Maths Part 1 Answers Solutions Chapter 7 Statistics.

9th Standard Maths 1 Practice Set 7.5 Chapter 7 Statistics Textbook Answers Maharashtra Board

Class 9 Maths Part 1 Practice Set 7.5 Chapter 7 Statistics Questions With Answers Maharashtra Board

Question 1.
Yield of soyabean per acre in quintal in Mukund’s field for 7 years was 10, 7, 5,3, 9, 6, 9. Find the mean of yield per acre.
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.5 1
Mean = 7
The mean of yield per acre is 7 quintals.

Question 2.
Find the median of the observations, 59, 75, 68, 70, 74, 75, 80.
Solution:
Given data in ascending order:
59, 68, 70, 74, 75, 75, 80
∴ Number of observations(n) = 7 (i.e., odd)
∴ Median is the middle most observation
Here, 4th number is at the middle position, which is = 74
∴ The median of the given data is 74.

Question 3.
The marks (out of 100) obtained by 7 students in Mathematics examination are given below. Find the mode for these marks.
99, 100, 95, 100, 100, 60, 90
Solution:
Given data in ascending order:
60, 90, 95, 99, 100, 100, 100
Here, the observation repeated maximum number of times = 100
∴ The mode of the given data is 100.

Question 4.
The monthly salaries in rupees of 30 workers in a factory are given below.
5000, 7000, 3000, 4000, 4000, 3000, 3000,
3000, 8000, 4000, 4000, 9000, 3000, 5000,
5000, 4000, 4000, 3000, 5000, 5000, 6000,
8000, 3000, 3000, 6000, 7000, 7000, 6000,
6000, 4000
From the above data find the mean of monthly salary.
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.5 2
∴ The mean of monthly salary is ₹ 4900.

Question 5.
In a basket there are 10 tomatoes. The weight of each of these tomatoes in grams is as follows:
60, 70, 90, 95, 50, 65, 70, 80, 85, 95.
Find the median of the weights of tomatoes.
Solution:
Given data in ascending order:
50, 60, 65, 70, 70, 80 85, 90, 95, 95
∴ Number of observations (n) = 10 (i.e., even)
∴ Median is the average of middle two observations
Here, 5th and 6th numbers are in the middle position
∴ Median = \(\frac { 70+80 }{ 2 }\)
∴ Median = \(\frac { 150 }{ 2 }\)
∴ The median of the weights of tomatoes is 75 grams.

Question 6.
A hockey player has scored following number of goals in 9 matches: 5, 4, 0, 2, 2, 4, 4, 3,3.
Find the mean, median and mode of the data.
Solution:
i. Given data: 5, 4, 0, 2, 2, 4, 4, 3, 3.
Total number of observations = 9

Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.5 4
∴ The mean of the given data is 3.

ii. Given data in ascending order:
0,2, 2, 3, 3, 4, 4, 4,5
∴ Number of observations(n) = 9 (i.e., odd)
∴ Median is the middle most observation
Here, the 5^th number is at the middle position, which is 3.
∴ The median of the given data is 3.

iii. Given data in ascending order:
0,2, 2, 3, 3, 4, 4, 4,5
Here, the observation repeated maximum number of times = 4
∴ The mode of the given data is 4.

Question 7.
The calculated mean of 50 observations was 80. It was later discovered that observation 19 was recorded by mistake as 91. What Was the correct mean?
Solution:
Here, mean = 80, number of observations = 50
\( \text { Mean }=\frac{\text { The sum of all observations }}{\text { Total number of observations }}\)
∴ The sum of all observations = Mean x Total number of observations
∴ The sum of 50 observations = 80 x 50
= 4000
One of the observation was 19. However, by mistake it was recorded as 91.
Sum of observations after correction = sum of 50 observation + correct observation – incorrect observation
= 4000 + 19 – 91
= 3928
∴ Corrected mean
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.5 5
= 78.56
∴ The corrected mean is 78.56.

Question 8.
Following 10 observations are arranged in ascending order as follows. 2, 3 , 5 , 9, x + 1, x + 3, 14, 16, 19, 20. If the median of the data is 11, find the value of x.
Solution:
Given data in ascending order :
2, 3, 5, 9, x + 1, x + 3, 14, 16, 19, 20.
∴ Number if observations (n) = 10 (i.e., even)
∴ Median is the average of middle two observations
Here, the 5th and 6th numbers are in the middle position.
∴ \( \text { Median }=\frac{(x+1)+(x+3)}{2}\)
∴ 11 = \(\frac { 2x+4 }{ 2 }\)
∴ 22 = 2x + 4
∴ 22 – 4 = 2x
∴ 18 = 2x
∴ x = 9

Question 9.
The mean of 35 observations is 20, out of which mean of first 18 observations is 15 and mean of last 18 observations is 25. Find the 18th observation.
Solution:
\( \text { Mean }=\frac{\text { The sum of all observations }}{\text { Total number of observations }}\)
∴ The sum of all observations
= Mean x Total number of observations
The mean of 35 observations is 20
∴ Sum of 35 observations = 20 x 35 = 700 ,..(i)
The mean of first 18 observations is 15
Sum of first 18 observations =15 x 18
= 270 …(ii)
The mean of last 18 observations is 25 Sum of last 18 observations = 25 x 18
= 450 …(iii)
∴ 18^th observation = (Sum of first 18 observations + Sum of last 18 observations) – (Sum of 35 observations)
= (270 + 450) – (700) … [From (i), (ii) and (iii)]
= 720 – 700 = 20
The 18^th observation is 20.

Question 10.
The mean of 5 observations is 50. One of the observations was removed from the data, hence the mean became 45. Find the observation which was removed.
Solution:
\( \text { Mean }=\frac{\text { The sum of all observations }}{\text { Total number of observations }}\)
∴ The sum of all observations = Mean x Total number of observations
The mean of 5 observations is 50
Sum of 5 observations = 50 x 5 = 250 …(i)
One observation was removed and mean of remaining data is 45.
Total number of observations after removing one observation = 5 – 1 = 4
Now, mean of 4 observations is 45.
∴ Sum of 4 observations = 45 x 4 = 180 …(ii)
∴ Observation which was removed
= Sum of 5 observations – Sum of 4 observations = 250 – 180 … [From (i) and (ii)]
= 70
∴ The observation which was removed is 70.

Question 11.
There are 40 students in a class, out of them 15 are boys. The mean of marks obtained by boys is 33 and that for girls is 35. Find out the mean of all students in the class.
Solution:
Total number of students = 40
Number of boys =15
∴ Number of girls = 40 – 15 = 25
The mean of marks obtained by 15 boys is 33
Here, sum of the marks obtained by boys
= 33 x 15
= 495 …(i)
The mean of marks obtained by 25 girls is 35 Sum of the marks obtained by girls = 35 x 25
= 875 …(ii)
Sum of the marks obtained by boys and girls = 495 + 875 … [From (i) and (ii)]
= 1370
∴ Mean of all the students
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.5 6
= 34.25
∴ The mean of all the students in the class is 34.25.

Question 12.
The weights of 10 students (in kg) are given below:
40, 35, 42, 43, 37, 35, 37, 37, 42, 37. Find the mode of the data.
Solution:
Given data in ascending order:
35, 35, 37, 37, 37, 37, 40, 42, 42, 43
∴ The observation repeated maximum number of times = 37
∴ Mode of the given data is 37 kg

Question 13.
In the following table, the information is given about the number of families and the siblings in the families less than 14 years of age. Find the mode of the data.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.5 7
Solution:
Here, the maximum frequency is 25.
Since, Mode = observations having maximum frequency
∴ The mode of the given data is 2.

Question 14.
Find the mode of the following data.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.5 8
Solution:
Here, the maximum frequency is 9.
Since, Mode = observations having maximum frequency
But, this is the frequency of two observations.
∴ Mode = 35 and 37

Maharashtra Board Class 9 Maths Chapter 7 Statistics Practice Set 7.5 Intext Questions and Activities

Question 1.
The first unit test of 40 marks was conducted for a class of 35 students. The marks obtained by the students were as follows. Find the mean of the marks.
40, 35, 30, 25, 23, 20, 14, 15, 16, 20, 17, 37, 37, 20, 36, 16, 30, 25, 25, 36, 37, 39, 39, 40, 15, 16, 17, 30, 16, 39, 40, 35, 37, 23, 16.
(Textbook pg, no. 123)
Solution:
Here, we can add all observations, but it will be a tedious job. It is easy to make frequency distribution table to calculate mean.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.5 9
= 27.31 marks (approximately)
∴ The mean of the mark is 27.31.

Class 9 Maths Digest

Practice Set 7.4 Algebra 9th Standard Maths Part 1 Chapter 7 Statistics Solutions Maharashtra Board

December 11, 2024December 6, 2024 by Prasanna

Balbharti Maharashtra State Board Class 9 Maths Solutions covers the Practice Set 7.4 Algebra 9th Class Maths Part 1 Answers Solutions Chapter 7 Statistics.

9th Standard Maths 1 Practice Set 7.4 Chapter 7 Statistics Textbook Answers Maharashtra Board

Class 9 Maths Part 1 Practice Set 7.4 Chapter 7 Statistics Questions With Answers Maharashtra Board

Question 1.
Complete the following cumulative frequency table:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.4 1
Solution:

Question 2.
Complete the following Cumulative Frequency Table:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.4 3
Solution:

Question 3.
The data is given for 62 students in a certain class regarding their mathematics marks out of 100. Take the classes 0 – 10, 10 – 20,… and prepare frequency distribution
table and cumulative frequency table more than or equal to type.
55. 60, 81, 90, 45, 65, 45, 52, 30, 85, 20, 10,
75, 95, 09, 20, 25, 39, 45, 50, 78, 70, 46, 64,
42. 58. 31, 82, 27, 11, 78, 97, 07, 22, 27, 36,
35, 40, 75, 80, 47, 69, 48, 59, 32, 83, 23, 17,
77, 45, 05, 23, 37, 38, 35, 25, 46, 57, 68, 45.
47,49
From the prcparcd table, answer the following questions :
i. How many students obtained marks 40 or above 40?
ii. How many students obtained marks 90 or above 90?
iii. How many students obtained marks 60 or above 60?
iv. What is the cumulative frequency of equal to or more than type of the class 0 – 10?
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.4 5
i. 38 students obtained marks 40 or above 40.
ii. 3 students obtained marks 90 or above 90.
iii. 19 students obtained marks 60 or above 60.
iv. Cumulative frequency of equal to or more than type of the class 0 – 10 is 62.

Question 4.
Using the data In example (3) above, prepare less than type cumulative frequency table and answer the following questions.
i. How many students obtained less than 40 marks?
ii. How many students obtained less than 10 marks?
iii. How many students obtained less than 60 marks?
iv. Find the cumulative frequency of the class 50 – 60.
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.4 6
i. 24 students obtained less than 40 marks.
ii. 3 students obtained less than 10 marks.
iii. 43 students obtained less than 60 marks.
iv. Cumulative frequency of the class 50 – 60 is 43.

Maharashtra Board Class 9 Maths Chapter 7 Statistics Practice Set 7.4 Intext Questions and Activities

Question 1.
The following information is regarding marks in mathematics, obtained out of 40, scored by 50 students of 9th std. ¡n the first unit test. (Textbook pg. no. 120)
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.4 7
From the table, fill in the blanks in the following statements.
i. For class interval 10 – 20 the lower class limit is _____ and upper class limit is _____
ii. How many students obtained marks less than 10? 2
iii. How many students obtained marks less than 20? 2 + ____ = 14
iv. How many students obtained marks less than 30? ______ + _____ = 34
v. How many students obtained marks less than 40? ______ + ______ =50
Solution:
i. 10, 20
iii. 12
iv. 14 + 20
v. 34 + 16

Question 2.
A sports club has organised a table-tennis tournaments. The following table gives the distribution of players ages. Find the cumulative frequencies equal to or more than the lower class limit and complete the table (Textbook pg. no. 121)
Solution:
Equal to lower limit or more than lower limit type of cumulative table.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.4 8

Class 9 Maths Digest

Practice Set 7.3 Algebra 9th Standard Maths Part 1 Chapter 7 Statistics Solutions Maharashtra Board

December 11, 2024December 6, 2024 by Prasanna

Balbharti Maharashtra State Board Class 9 Maths Solutions covers the Practice Set 7.3 Algebra 9th Class Maths Part 1 Answers Solutions Chapter 7 Statistics.

9th Standard Maths 1 Practice Set 7.3 Chapter 7 Statistics Textbook Answers Maharashtra Board

Class 9 Maths Part 1 Practice Set 7.3 Chapter 7 Statistics Questions With Answers Maharashtra Board

Question 1.
For class interval 20 – 25 write the lower class limit and the upper class limit.
Answer:
Lower class limit = 20
Upper class limit = 25

Question 2.
Find the class-mark of the class 35-40.
Solution:
Class-mark
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 1
∴ Class-mark of the class 35 – 40 is 37.5

Question 3.
If class-mark is 10 and class width is 6, then find the class.
Solution:
Let the upper class limit be x and the lower class limit be y.
Class mark = 10 …[Given]
Class-mark
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 2
∴ x + y = 20 …(i)
Class width = 6 … [Given]
Class width = Upper class limit – Lower class limit
∴ x – y = 6 …(ii)
Adding equations (i) and (ii),
x + y = 20
x – y = 6
2x = 26
∴ x = 13
Substituting x = 13 in equation (i),
13 + y = 20
∴ y = 20 – 13
∴ y = 7
∴ The required class is 7 – 13.

Question 4.
Complete the following table.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 3
Solution:
Let frequency of the class 14 – 15 be x then, from table,
5 + 14 + x + 4 = 35
∴ 23 + x = 35
∴ x = 35 – 23
∴ x = 12

Question 5.
In a ‘tree plantation’ project of a certain school there are 45 students of ‘Harit Sena.’ The record of trees planted by each student is given below:
3, 5, 7, 6, 4, 3, 5, 4, 3, 5, 4, 7, 5, 3, 6, 6, 5, 3, 4, 5, 7, 3, 5, 6, 4, 4, 3, 5, 6, 6, 4, 3, 5 ,7, 3, 4, 5, 7, 6, 4, 3, 5, 4, 4, 7.
Prepare a frequency distribution table of the data.
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 5

Question 6.
The value of n upto 50 decimal places is given below:
3.14159265358979323846264338327950288419716939937510
From this information prepare an ungrouped frequency distribution table of digits appearing after the decimal point.
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 6

Question 7.
In the tables given below, class-mark and frequencies is given. Construct the frequency tables taking inclusive and exclusive classes.
i.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 7
ii.

Solution:
i. Let the Lower class limit and upper class limit of the class mark 5 be x and y respectively.

∴x + y = 10
Here, class width = 15 – 5 = 10
But, Class width = Upper class limit – Lower class limit
∴ y – x = 10
∴ -x + y = 10 …(ii)
Adding equations (i) and (ii),
x+ y = 10
-x + y = 10
∴ 2y = 20
∴ y = 10
Substituting y = 10 in equation (i),
∴ x + 10 = 10
∴ x = 0
∴ class with class-mark 5 is 0 – 10
Similarly, we can find the remaining classes.
∴ frequency table taking inclusive and exclusive classes.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 10

ii. Let the lower class limit and upper class limit of the class mark 22 be x andy respectively.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 11
∴ x + y = 44 …(i)
Here, class width = 24 – 22 = 2
But, Class width = Upper class limit – Lower class limit
∴ y – x = 2
∴ -x + y = 2 …. (ii)
Adding equations (i) and (ii),
x + y = 44
– x + y= 2
2y = 46
∴ y = 23
Substituting y = 23 in equation (i),
∴ x + 23 = 44
∴ x = 21
∴ class with class-mark 22 is 21 – 23
Similarly, we can find the remaining classes
∴ frequency table taking inclusive and exclusive classes.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 12

Question 8.
In a school, 46 students of 9th standard, were told to measure the lengths of the pencils in their compass-boxes in Centimetres. The data collected was as follows:
16, 15, 7, 4.5, 8.5, 5.5, 5, 6.5, 6, 10, 12, 13,
4.5, 4.9, 16, 11, 9.2, 7.3, 11.4, 12.7, 13.9, 16,
5.5, 9.9, 8.4, 11.4, 13.1, 15, 4.8, 10, 7.5, 8.5,
6.5, 7.2, 4.5, 5.7, 16, 5.7, 6.9, 8.9, 9.2, 10.2, 12.3, 13.7, 14.5, 10
By taking exclusive classes 0-5, 5-10, 10-15,…. prepare a grouped frequency distribution table.
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 13

Question 9.
In a village, the milk was collected from 50 milkmen at a collection center in litres as given below:
27, 75, 5, 99, 70, 12, 15, 20, 30, 35, 45, 80, 77,
90, 92, 72, 4, 33, 22, 15, 20, 28, 29, 14, 16, 20,
72, 81, 85, 10, 16, 9, 25, 23, 26, 46, 55, 56, 66,
67, 51, 57, 44, 43, 6, 65, 42, 36, 7, 35
By taking suitable classes, prepare grouped frequency distribution table.
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 14

Question 10.
38 people donated to an organisation working for differently abled persons. The amount in rupees were as follows:
101, 500, 401, 201, 301, 160, 210, 125, 175,
190, 450, 151, 101, 351, 251, 451, 151, 260,
360, 410, 150, 125, 161, 195, 351, 170, 225,
260, 290, 310, 360, 425, 420, 100, 105, 170, 250, 100
i. By taking classes 100 – 149, 150 – 199, 200 – 249… prepare grouped frequency distribution table.
ii. From the table, find the number of people who donated ₹350 or more.
Solution:
i.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 15
ii. Number of people who donated ₹ 350 or more = 4 + 4 + 2 + 1 = 11

Maharashtra Board Class 9 Maths Chapter 7 Statistics Practice Set 7.3 Intext Questions and Activities

Question 1.
The record of marks out of 20 in Mathematics in the first unit test is as follows:
20,6, 14, 10, 13, 15, 12, 14, 17. 17, 18, 1119,
9, 16. 18, 14, 7, 17, 20, 8, 15, 16, 10, 15, 12.
18, 17, 12, 11, 11, 10, 16, 14, 16, 18, 10, 7, 17,
14, 20, 17, 13, 15, 18, 20, 12, 12, 15, 10
Answer the following questions, from the above information.
a. How many students scored 15 marks?
b. How many students scored more than 15 marks?
c. How many students scored less than 15 marks?
d. What is the lowest score of the group?
e. What is the highest score of the group? (Textbook pg. no. 114)
Solution:
a. 5 students scored 15 marks.
b. 20 students scored more than 15 marks.
c. 25 students scored less than 15 marks.
d. 6 is the lowest score of the group.
e. 20 is the highest score of the group.

Question 2.
For the above Question prepare Frequency Distribution Table. (Textbook pg. no. 115)
Solution:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.3 16

Class 9 Maths Digest

Practice Set 7.2 Algebra 9th Standard Maths Part 1 Chapter 7 Statistics Solutions Maharashtra Board

December 11, 2024December 6, 2024 by Prasanna

Balbharti Maharashtra State Board Class 9 Maths Solutions covers the Practice Set 7.2 Algebra 9th Class Maths Part 1 Answers Solutions Chapter 7 Statistics.

9th Standard Maths 1 Practice Set 7.2 Chapter 7 Statistics Textbook Answers Maharashtra Board

Class 9 Maths Part 1 Practice Set 7.2 Chapter 7 Statistics Questions With Answers Maharashtra Board

Question 1.
Classify following information as primary or secondary data.
i. Information of attendance of every student collected by visiting every class in a school
ii. The information of heights of students was gathered from school records and sent to the head office, as it was to be sent urgently.
iii. In the village Nandpur, the information collected from every house regarding students not attending school.
iv. For science project, information of trees gathered by visiting a forest.
Answer:
i. Primary data
ii. Secondary data
iii. Primary data
iv. Primary data

Class 9 Maths Digest

Practice Set 7.1 Algebra 9th Standard Maths Part 1 Chapter 7 Statistics Solutions Maharashtra Board

December 11, 2024December 6, 2024 by Prasanna

Balbharti Maharashtra State Board Class 9 Maths Solutions covers the Practice Set 7.1 Algebra 9th Class Maths Part 1 Answers Solutions Chapter 7 Statistics.

9th Standard Maths 1 Practice Set 7.1 Chapter 7 Statistics Textbook Answers Maharashtra Board

Class 9 Maths Part 1 Practice Set 7.1 Chapter 7 Statistics Questions With Answers Maharashtra Board

Question 1.
The following table shows the number of Buses and Trucks in nearest lakh units. Draw percentage bar diagram. (Approximate the percentages to the nearest integer)
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.1 1
Solution:

Question 2.
In the table given below, the information is given about roads. Using this draw sub-divided and percentage bar diagram (Approximate the percentages to the nearest integer)

Solution:
i. Sub-divided bar diagram:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.1 5

ii. Percentage bar diagram:
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.1 7

Maharashtra Board Class 9 Maths Chapter 7 Statistics Practice Set 7.1 Intext Questions and Activities

Question 1.
A farmer has produced Wheat and Jowar in his field. The following joint bar diagram shows the production of Wheat and Jowar. From the gken diagram answer the following questions: (Textbook pg. no. 108)
i. Which crop production has increased consistently in 3 years?
ii. By how many quintals the production ofjowar has reduced in 2012 as compared to 2011?
iii. What is the difference between the production of wheat in 2010 and 2012 ?
iv. Complete the following table using this diagram.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.1 9

Solution:
i. The crop production of wheat has increased consistently in 3 years.
ii. The production of jowar has reduced by 3 quintals in 2012 as compared to 2011.
iii. The difference between the production of wheat in 2010 and 2012 = 48 – 30 = 18 quintals
iv.
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.1 11

Question 2.
In the following table, the information of number of girls per 1000 boys is given for different states. Fill In the blanks and complete the table. (Textbook pg. no. 111)
Maharashtra Board Class 9 Maths Solutions Chapter 7 Statistics Practice Set 7.1 12
Solution:
Draw percentage bar diagram from this information and discuss the findings from the diagram.

Question 3.
For the above given activity, the information of number of girls per 1000 boys is given for five states. The literacy percentage of these five states is given below. Assam (73%), Bihar (64%), Punjab (77%), Kerala (94%), Maharashtra (83%). Think of the number of girls and the literacy percentages in the respective states. Can you draw any conclusions from it? (Textbook pg. no. 112)
Solution:
By observing the number of girls per 1000 boys and literacy percentages in the given respective states, we can conclude that the literacy rate of girls is least in Bihar and is highest in Kerala.

Class 9 Maths Digest