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प्रश्न
It is weathering that is responsible for bio-diversity on the earth. How?
उत्तर
Weathering processes lead to breaking down the rocks into smaller fragments and preparing the way for formation of not only regolith and soils, but also erosion and mass movements. Bio-diversity is basically a result of forests and vegetation. Forests and vegetation depend upon the depth of weathering mantles. Erosion cannot be significant if the rocks are not weathered. It implies that weathering aids mass wasting, erosion and reduction of relief and changes in landforms are a consequence of erosion.
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संबंधित प्रश्न
From encyclopedias and the Internet, find out the different types of soil found in India. Discuss the importance of these soils for crops cultivated in our country. You should form groups in class for this activity.
In which regions of the world is ‘frost action’ the common form of weathering?
Make a chart for your classroom showing the causes of different types of weathering.
What is known as mass wasting?
Give one example of rapid mass movement.
Give a technical term for the following:
Disintegration or decomposition of rock.
Give a technical term for the following:
Peeling off of the outer layer of rock through contraction and expansion.
Give a technical term for the following:
Expansion of minerals in rocks on coming into contact with rainwater.
Say whether the following is ‘True’ or ‘False’.
Shear plane is the surface on which movement of a landslide takes place as a result of its breaking off.
Say whether the following is ‘True’ or ‘False’.
External forces are engaged only in erosion
Define weathering and describe the chief characteristics of weathering.
What is weathering?
What do you understand by the following term:|
Desilication
How are the different kinds of soils in Temperate zones formed?
Rewrite the following sentence, choosing the right word from the options given below:
_______refers to the gradual disintegration and decomposition of rocks which lie exposed to the elements of weather.
Rewrite the following sentence, choosing the right word from the options given below:
_______soils are those which are undisturbed by erosion or deposition.
Match the following pairs correctly:
| A | B |
| (a) A soil formed at a place or a particular site | Alluvium |
| (b) Over a long period of time this soil become mature | Transported soil |
| (c) It is most fertile soil when renewed every year | Podzol |
| (d) This soil is found is cool or cold humid areas | Residual |
Distinguish between the following :
Erosion and Weathering.
Account for the two types of weathering.
Describe how changes of temperature lead to weathering.
OR
How do changing temperature lead to weathering?
How does frost action cause weathering?
Give reasons for the following :
Climate is the most important factor of soil formation.
Give reasons for the following :
A soil dominated by clay makes tilling difficult.
Give a geographical reason:
Temperature is the main factor behind granular weathering.
Give a geographical reason:
Effect of mass movement will be greater along the western slope of the Sahyadri's than the eastern slope.
Is weathering essential as a pre-requisite in the formation of soils? Why?
