Class 6 NCERT Solutions Geography Chapter 6 - Major Landforms of the Earth
Major Landforms of the Earth Exercise 46
(a) The major landforms of the earth are:
|It is a naturally elevated surface of the earth.||It is an elevated flat land.|
|It is higher than the surrounding area.||It is a flat-topped land that stands above the surrounding area.|
|It generally rises above 600 meters.||It rises from a few hundred meters to several thousand meters.|
|They are rich in forests.||They are rich in mineral deposits.|
|Examples: Rockies, Alps, Himalayas, Andes, etc.||Examples: Tibet plateau, Deccan plateau, East African plateau, etc.|
(c) The different types of mountains are:
- Fold Mountains: They are formed from the folding of earth's crust.
- Volcanic Mountains: They are formed due to volcanic activity.
- Block Mountains: They are created when large areas are broken and displaced vertically.
(d) Mountains are useful to man in the following manner:
- They are storehouses of water. Many rivers have their sources in the glaciers.
- Water present in the mountains is ideal for agriculture and irrigation purposes. It also helps in the production of hydroelectricity.
- They have rich variety of flora and fauna.
- The forests provide fuel, fodder, shelter and other products.
- They provide idyllic sites for tourists and enhance tourism for the specific country.
- They encourage several sports such as paragliding, river rafting, etc.
(e) Plains are large stretches of flat land. They are formed mostly by the rivers and its tributaries.
- The rivers flow down the slopes of mountains and erode them.
- They carry down/forward the eroded material (stones, sand, etc.).
- They then deposit these materials along their courses or in the valleys.
Thus, these deposits then collected then form plains.
(f) River plains are generally very thickly-populated because:
- These plains are flat in nature and also very fertile.
- This provides favourable conditions for agriculture and also for human inhabitation.
Also, construction of transport network is easy.
(g) Mountains are thinly populated because of:
- Harsh climate.
- Hardly any land available for farming.
- Have steep slopes, which make it difficult to construct houses.
Few developed means of transport.
(a) A plain is an unbroken flat or a low-level land.
(b) The Himalayas and the Alps are examples of fold types of mountains.
(c) Plateau areas are rich in mineral deposits.
(d) The range is a line of mountains.
(e) The plain areas are most productive for farming.