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Question
Is weathering essential as a pre-requisite in the formation of soils? Why?
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Solution
Yes, weathering is an essential pre-requisite in the formation of soils. Weathering is action of elements of weather and climate over earth materials. There are a number of processes within weathering which act either individually or together to affect the earth materials in order to reduce them to fragmental state. Weathering is mechanical disintegration and chemical decomposition of rocks through the actions of various elements of weather and climate.
Weathering is an important process in the formation of soils. When rocks undergo weathering, rocks start to break up and take form of soil gradually.
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RELATED QUESTIONS
Soil formation is an important benefit of weathering. How is it important for mankind?
Match the column
| Column A | Column B |
| 1. Granular disintegration | (i) causes feldspar to become a powdery mass |
| 2. Oxidation | (ii) is common in deserts |
| 3. Carbonation | (iii) is the simplest form of chemical weathering |
| 4. Hydration | (iv) mainly affects limestone regions |
| 5. Solution | (v) results in the rusting of iron |
Distinguish between the following pair:
Weathering and erosion
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Granular disintegration and exfoliation
Give geographical reason:
Gases in the atmosphere affect weathering.
List any three factors that affect weathering.
In which regions of the world is ‘frost action’ the common form of weathering?
Which is the most important effect of weathering?
What is known as exfoliation?
What is known as oxidation?
Give a technical term for the following:
Disintegration or decomposition of rock.
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’.
In dry climates mechanical weathering is dominant.
Define weathering.
How is humus formed?
What do you understand by the following term:|
Regolith
What do you understand by the following term:|
Humus
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?
Give reasons for the following :
Climate is the most important factor of soil formation.
Give reasons for the following :
Farmers are encouraged to adopt soil conservation methods.
Give reasons for the following :
A soil dominated by clay makes tilling difficult.
Give reasons for the following :
Grassland soils are less acidic than forest soils.
Explain the following terms.
Colloids
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.
Name three types of weathering.
