Major Landforms of the Earth Class 6 Extra Questions Geography Chapter 6

Major Landforms of the Earth Class 6 Extra Questions Social Science Geography Chapter 6

NCERT Extra Questions for Class 6 Social Science Geography Chapter 6 Major Landforms of the Earth

Major Landforms of the Earth Class 6 Extra Questions Very Short Answer Type

Question 1.
What are the two processes?
Answer:
The two processes are:
Internal Processes: lead to

• Upliftment of the earth’s surface.
• Sinking of the earth’s surface.

External Processes are the processes which continuously

• wear down the surface.
• rebuild the surface.

Question 2.
What are erosion and deposition?
Answer:
Erosion:

• Wearing down of the earth’s surface is called erosion.
• Erosional process lowers the surface.

Deposition:

• Rebuilding of earth’s surface is called deposition.

Question 3.

Name the agents of erosion and deposition.
Answer:
Agents of erosion and deposition:

• Running water (river)
• Ice
• Wind.

Question 4.
What are the three groups of landforms broadly?
Answer:
Three groups of landforms:

1. Mountains
2. Plateaus
3. Plains.

Question 5.
As one goes higher what happens with climate?
Answer:
As one goes higher climate becomes colder.

Question 6.
Why do lesser people live in mountain areas?
Answer:
Lesser people live in mountain areas because of the following reasons:

• Less land is available for farming because of steep slope.
• Harsh climate.

Major Landforms of the Earth Class 6 Extra Questions Short Answer Type

Question 1.
Define (i) Mountains (ii) Glaciers.
Answer:
Mountains are natural elevations of the earth’s surface with a small summit and a broad base, higher than the surrounding area.
Glaciers are permanent moving heaps of ice and snow.

Question 2.
What are mountain ranges? Give some examples of mountain ranges. Answer: • Mountains, arranged in a line are called mountain ranges.
Examples:

• The Himalayas (India—Asia)
• The Alps (Europe)
• The Andes (South America) –
• The Rockies (North America).

Major Landforms of the Earth Class 6 Extra Questions Long Answer Type

Question 1.
Describe three types of mountains.
Answer:
Three Types of Mountains:

1. The Fold Mountains

• Mountains formed of folding process of the strata are called fold mountains
  

The Himalayas and the Alps are young fold mountains.

• They have rugged relief.
• They have high conical hills.

Aravallis in India are old fold mountains.

• They are considerably worn down by the processes of erosion.

Appalachians in North America and Urals in Russia have rounded features.

• They are low in elevation.
• They are very old fold mountains.

2. Block Mountains

• When large areas are broken and displaced vertically, block mountains are created.
• The uplifted blocks are termed as horsts.
• Lowered blocks are named as graben.
• Rhine valley and Vosges are good examples of such block mountains.

Some more examples of this type of mountains/landforms:

• Rift valley of Narmada and Tapi
• Deccan Plateau
• Meghalaya Plateau
• Drakeusburge (in South Africa)
• Australian Plateau
• Saudi Arabian landforms
• African Tableland.

3. Volcanic Mountains

• Volcanic activity leads to the formation of volcanic mountains.

• Examples of volcanic mountains:
• Kilimanjaro Mountains (in Africa).
• Mt. Fujiyama (in Japan).
  

Question 2.
What are plateaus? Give their major features.
Answer:
Plateaus:
Plateaus are flat topped tableland with steep slopes on one side or more sides.

Features of the Plateaus:
Height varies from a few hundred metres to several thousand metres.

• Plateaus may be young or old.
• Deccan Plateau of India is one of the oldest plateaus of the world.
• Other examples: East African Plateau (in Kenya, Tanzania and Uganda). Western Plateau of Australia.
• The Tibet Plateau is the highest plateau of the world with a 4000 to 6000 metres above mean sea level.

Question 3.
How are plateaus useful to us?
Answer:
Usefulness of Plateaus:

• Rich in mineral resources/deposits.
• Numerous mining areas are located in the plateau areas:
• African plateau is known for gold and diamond mining.
• Chhotanagpur plateau in India is rich in iron ore, coal and manganese.
• Plateaus have several waterfalls, ideal sites for generation of hydro electricity:
• Hundru falls in Chhotanagpur Plateau on River Subernarekha.
• Jog falls in Karnataka.
• Lava plateaus rich in black soil are ideal for cultivation.
• Some plateaus are known for scenic spots and they are great attractions to tourists.

Question 4.
Define plains. Describe their major features.
Answer:
Plains:
Definition. Plains are large stretches of flat land, not higher than 200 metres from mean sea level

• Some are extremely level.
• Others are rolling and undulating.

Major Features of Plains:

• Mostly formed by river deposits.
• Plains are generally fertile.
• They are thickly populated.
• They have dense network of roads and railways.
• Agriculture is the main occupation of the people.
• Examples:
• Ganga-Indus-Brahmaputra Plains in India.
• Yangtze Plain in China.
  

Question 5.
Describe the relationship between landforms and people.
Answer:
Landforms and People:
People live on different landforms in different ways:

• Life is difficult in mountains.
• Plains are major attractions for people.
• In plains it is easy to build houses, construct roads, raise crops.
• In mountains earthquakes, volcanic eruptions etc. cause huge damage to life and property.

Some people misuse landforms:

• They use land as waste like constructing house on fertile land.
• They throw garbage on land and in water making them polluted.

We have special duty to save landforms for future generations.

Multiple Choice Questions

Choose the correct answer:

Question 1.
The wearing away of the earth’s surface is called
(a) mountains
(b) plateau
(c) erosion
(d) deposition
Answer:
erosion

Question 2.
In some mountains there are permanently frozen rivers of ice known as
(a) river valley
(b) glaciers
(c) plateaus
(d) none of these
Answer:
glaciers

Question 3.
The lower blocks in Block Mountains are
(a) graben
(b) horsts
(c) glaciers
(d) none of these
Answer:
graben

Question 4.
Mountains may be arranged in a line known as
(a) horsts
(b) range
(c) glacier
(d) all of these
Answer:
range

Question 5.
Where are glaciers found?
(a) In plains
(b) In mountains
(c) In plateaus
(d) None of these
Answer:
In mountains

Question 6.
Tibet is a
(a) plateau
(b) mountain range
(c) both (a) and (b)
(d) none of these
Answer:
plateau

Question 7.
Which is the important mountain range of Europe?
(a) Alps
(b) Rockies
(c) Andes
(d) All of these
Answer:
Alps

8. Which area is the most useful for human habitation?
(a) Plain
(b) Mountain
(c) River
(d) Glacier
Answer:
Plain

Question 9.
Where is it easy to grow crops, build a house and a road?
(a) Mountain
(b) Plain
(c) River
(d) Glacier
Answer:
Plain

Question 10.
The available land is not only for our use but also for
(a) future generation
(b) past generation
(c) present generation
(d) none of these
Answer:
future generation

Question 11.
Where does river Yangtze flow?
(a) India
(b) Kenya
(c) China
(d) Australia
Answer:
China

Extra Questions for Class 6 Social Science

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