NCERT Class 6 Social Science Chapter 18 Major Landforms of the Earth

NCERT Class 6 Social Science Chapter 18 Major Landforms of the Earth Solutions to each chapter is provided in the list so that you can easily browse through different chapters NCERT Class 6 Social Science Chapter 18 Major Landforms of the Earth and select need one. NCERT Class 6 Social Science Chapter 18 Major Landforms of the Earth Question Answers Download PDF. NCERT SST Class 6 Solutions.

NCERT Class 6 Social Science Chapter 18 Major Landforms of the Earth

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Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. CBSE Class 6 Social Science Solutions are part of All Subject Solutions. Here we have given NCERT Class 6 Social Science Chapter 18 Major Landforms of the Earth, NCERT Class 6 Social Science Textbook of Our Pasts – I: History, The Earth – Our Habitat: Geography, Social and political Life: Civics. for All Chapters, You can practice these here.

Major Landforms of the Earth

Chapter: 18

THE EARTH – OUR HABITAT [GEOGRAPHY]

NCERT TEXTBOOK QUESTIONS WITH ANSWERS

Q. 1. Answer the following questions briefly: 

(a) What are the major landforms?

Ans. The major landforms are mountains, plateaus and plains.

(b) What is the difference between a mountain and a plateau?

Ans.

(c) What are the different types of mountains?

Ans. The different types of mountains are: 

(i) Fold Mountains. 

(ii) Block Mountains. 

(iii) Volcanic Mountains.

(d) How are mountains useful to man?

Ans. Mountains are useful to man because:

(1) The mountains are a store house of water, because many rivers have their source in the glaciers in the mountains.

(2) Water from the mountains is used for generation of hydro electricity and irrigation.

(3) Mountains provide an attractive site for tourists.

(4) Mountains have a rich variety of flora and fauna.

(5) Reservoirs are made and the water is harnessed for the use of people. 

(6) Several sports like paragliding, hang-gliding, river rafting and skiing are popular in the mountains.

(e) How are plains formed? 

Ans. The plains are formed by the rivers and their tributaries. The rivers flow down the slopes of mountains and can easily erode them. They even carry forward the eroded material.

Then they deposit their load consisting of stones, sand and silt along with their courses and their valleys. That is how the plains are formed. 

(f) Why are the river plains thickly populated?

Ans. The river plains are thickly populated due to certain reasons like: 

(1) Plains are very fertile.

(2) Construction of transport network is very easy in these plains. 

(3) Plains are very suitable for human habitation.

(g) Why are mountains thinly populated?

Ans. The mountains are thinly populated because:

(1) Undulating topography and harsh climate.

(2) The slopes are steep and less land is available for farming.

Thus, the mountains show that they are very thinly populated.

Q. 2. Tick (✓) the correct answer:

(a) The mountains differ from the hills in terms of:

(i) elevation.

(ii) slope.

(iii) aspect.

Ans. (i) elevation.

(b) Glaciers are found in: 

(i) the mountains.

(ii) the plains.

(iii) the plateaus.

Ans. (i) the mountains.

(c) The Deccan Plateau is located in:

(i) Kenya.

(ii) Australia.

(iii) India.

Ans. (iii) India.

(d) The river Yangtze flows in:

(i) South America.

(ii) Australia.

(iii) China.

Ans. (iii) China.

(e) An important mountain range of Europe is:

(i) the Andes.

(ii) the Alps.

(iii) the Rockies.

Ans. (ii) the Alps. 

Q. 3. Fill in the blanks:

1. A __________ is an unbroken flat or a low-level land.

Ans. plain.

2. The Himalayas and the Alps are examples of ________ types of mountains.

Ans. fold.

3. ________ areas are rich in mineral deposits.

Ans. Plateau. 

4. The ___________ is a line of mountains.

Ans. range. 

5. The _________ areas are most productive for farming.

Ans. Plain.

THINGS TO DO

Q. 1. What kind of landforms are found in your state? Based on the reading of this chapter, say how they are of use to the people. 

Ans. In my state, plains are found. 

They are of use to people as:

(i) They are generally fertile. People can easily engage themselves in farming activities and get high produce.

(ii) Construction of transport network is easy. 

(iii) Construction of houses is also carried on large scale.

MAP SKILLS

On the outline map of the world, mark the following:

(a) Mountain ranges: Himalayan, Rockies and Alps. 

(b) Plateau: Tibet

Fig. Map of the world

SOME OTHER IMPORTANT QUESTIONS FOR EXAMINATION

VERY SHORT ANSWER TYPE QUESTIONS

Q. 1. What is erosion?

Ans. The wearing away of the earth’s surface is known as erosion. 

Q. 2. What happens when we move higher in the mountains? 

Ans. When we move higher in the mountain, the climate becomes colder.

Q. 3. Name the mountain ranges of South America, Europe and Asia. 

Ans. The mountain ranges of South America, Europe and Asia are the Andes, the Alps and the Himalayas respectively.

Q. 4. Give two examples of block mountains. 

Ans. The Rhine valley and the Vosges mountain in Europe are the examples of block mountains.

Q. 5. Name a fold mountain in North America.

Ans. Appalachians.

Q. 6. Give examples of volcanic mountains. 

Ans. Mount Kilimanjaro in Africa and Mount Fujiyama in Japan.

Q. 7. Name the plateau which is famous for gold and diamond mining.

Ans. African Plateau. 

Q. 8. Chota Nagpur plateau is rich in which minerals.

Ans. Coal and Magnesium.

Q. 9. Name an undersea mountain. 

Ans. Mauna Kea (Hawaii) in the Pacific Ocean.

Q. 10. Name the waterfall in Karnataka and the Chota Nagpur plateau.

Ans. The waterfall in Karnataka and Chota Nagpur plateau’s are The Jog falls and the Hundru falls.

SHORT ANSWER TYPE QUESTIONS

Q. 1. Give the two uses of mountains.

Ans. The two uses of mountains are:

(a) Mountains provide an attractive site for tourists.

(b) Several sports like hang gliding, paragliding, river rafting and skiing are popular in the mountains.

Q. 2. Define plateaus. Give two examples of old plateaus.

Ans. Plateau is an elevated flat land.

The two examples of old plateaus are:

(a) The Deccan Plateau. 

(b) East African Plateau in Kenya.

Q. 3. What makes the plains fertile and habitable?

Ans. The plains are fertile and habitable because: 

(a) The river carry forward the eroded material.

(b) The river deposits their load consists of silt, sand and stones along with their courses and in their valleys.

Q. 4. Why is the living condition difficult in mountains than in plains? 

Ans. The living condition is difficult in mountains than in plains because it is easy to build a road, a house, a grow crops in a plain than a hilly area.

Q. 5. Why are lava plateau ideal for cultivation?

Ans. The lava plateaus are rich in black soil that are fertile and thus good for cultivation.

Q. 6. Explain the two processes involved in the formation of landform. 

Ans. The two processes involved in the formation of landforms are:

(a) Internal Process: Forces which originate from within the earth, create irregularities on the surface of the earth e.g., volcanoes, earthquakes. 

(b) External Process: Process or forces with originates from outside the earth. These forces continuously wear down and rebuilds the land surface of erosion, deposition.

Q. 7. How are plains formed? 

Ans. Plains are formed because of the rivers and their tributaries:

(a) The rivers flow down the slopes of mountains and can easily erode them.

(b) They even carry the eroded material.

(c) Then they deposit their load consisting of stones, sand and silt along with their courses and their valleys.

Thus, the plains are formed.

Q. 8. Why are plains thickly populated?

Ans. The plains are thickly populated because: 

(a) Plains are very fertile.

(b) Construction of transport network is very easy in these plains.

(c) Plains are very suitable for human habitation.

LONG ANSWER TYPE QUESTIONS

Q. 1. Give some uses of the mountain. 

Ans. Some uses of the mountain are:

(a) It is the store-house of water, because many rivers have their source in the glaciers in the mountains.

(b) Mountains are idyllic site for tourists.

(c) It has a rich variety of flora and fauna. 

(d) Reservoirs are made and the water is harnessed for the use of people.

(e) Water from the mountains is used for irrigation and generation of hydro-electricity. 

Many sports like paragliding, hang gliding, river rafting and skiing are popular in these mountains.

Q. 2. Why do 90% of the population live in plains? Give examples to illustrate your answer.

Or

Explain the importance of plains.

Ans. The 90% of the population live in plains because: 

(a) Most plains have fertile soil and are thus, ideal for agriculture.

(b) River plains have abundant supply of water, which is very useful for human settlements.

(c) The flat surface of plains helps in the construction of transport network, buildings, industries etc.

Thus, plains are most thickly populated areas of the world.

Q. 3. How is volcanic mountain formed? 

Ans. Formation of Volcanic mountains: 

(a) Deposition of molten material called lava.

(b) This lava is from beneath the earth’s crust.

(c) The internal earth movements push the molten material to the surface through openings or vent in the crust.

(d) The molten material piles up and cools layer after layer over the years to form a conical mountain. 

One of the examples of volcanic mountain is the Barren island in the Bay of Bengal.

Q. 4. Distinguish between a fold mountain and a block mountain.

Ans.

HIGH ORDER THINKING SKILLS

Q. 1. Why are plains thickly populated?

Ans. The plains are thickly populated because: 

(a) They are very fertile.

(b) The construction of transport network is very easy.

(c) It is very much suitable for human habitation because of availability of water. 

(d) The houses, buildings and cultivation are very much suitable in plains.

Q. 2. How are plateaus useful to man?

Ans. The plateaus are useful to man because: 

(a) They have rich mineral deposits. 

(b) Many of the mining areas in the world are located in the plateau region.

(c) Water is available in heavy amount to other purposes. 

(d) The scenic spots attract the attention of the tourist.

Q. 3. How are block mountains created?

Ans. Formation of Block mountains:

(a) These mountain are formed when large areas are broken and displaced.

(b) It includes the process of horsts i.e., uplifted fold and graben i.e., the lowered block.

(c) The Rhine Valley and Vosges mountain are its examples.

VALUE BASED QUESTIONS

Q. 1. How do the landforms affect the life of the people?

Ans. Human have been living on different kinds of landforms: 

(a) Life is difficult in the mountains.

(b) Natural calamities or disasters such as earthquake, storms, volcanic eruption, and floods cause widespread destruction.

(c) Huge loss of life and property took place. 

(d) Plains provide much better life than any other areas.

(e) Life is very easy in plains.

(f) Water for irrigation and other works are very much available here.

Q. 2. How can we make our earth a better place to live in? 

Ans. We can make our earth a better place to live in:

(a) We throw garbage on land or in rivers making them dirty. It causes uncivic manners in order to keep our surrounding clean.

(b) The available land is not only for our use. 

(c) It is our duty to leave the earth a better place for future generations as well.

PICTURE BASED QUESTIONS 

Look at the picture carefully and answer the following questions.

Fig. Plains

(a) What is a plain?

Ans. It is a large stretch of flat land. 

(b) Name two largest plains made by the rivers.

Ans. The largest plains made by the rivers are Ganga and Brahmaputra in India and Yangtze in China.

(c) How are plains useful? 

Ans. Plains are useful because:

(i) It has a great concentration of people as more flat land is available for building houses.

(ii) The land of plains is highly productive for agriculture.

OBJECTIVE TYPE QUESTIONS

l. MULTIPLE CHOICE QUESTIONS:

Tick (✓) the correct option:

(a) The highest plateau in the world is the ___________ plateau.

(i) Deccan.

(ii) Tibetan.

(iii) Patagonian.

Ans. (ii) Tibetan.

(b) Glaciers are found in _______.

(i) mountains.

(ii) plateaus.

(iii) plains.

Ans. (i) mountains. 

(c) The Andes Mountains are in ________.

(i) South America.

(ii) Europe.

(ii) Asia.

Ans. (i) South America.

II. FILL IN THE BLANKS:

(a) Volcanic mountains are made up of __________.

Ans. molten lava. 

(b) A block mountain is also called as __________.

Ans. Horst.

(c) The Alps are located in __________.

Ans. Europe.