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प्रश्न
Is weathering essential as a pre-requisite in the formation of soils? Why?
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उत्तर
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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संबंधित प्रश्न
Complete the flowchart below.
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.
Distinguish between the following pair:
Weathering and erosion
Give geographical reason:
Gases in the atmosphere affect weathering.
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.
Distinguish between the Structural plain and Depositional plains.
What is known as exfoliation?
What is known as Sheet Wash?
Give a technical term for the following:
Peeling off of the outer layer of rock through contraction and expansion.
Say whether the following is ‘True’ or ‘False’.
In dry climates mechanical weathering is dominant.
Describe the chief characteristics of weathering.
Distinguish between:
Weathering and Denudation
What do you understand by the following term:|
Exfoliation
What do you understand by the following term:|
Regolith
What do you understand by the following term:|
Desilication
What do you understand by the following term:|
Humus
Rewrite the following sentence, choosing the right word from the options given below:
_______is produced by the decayed organic material, including dead leaves, stems roots, living bacteria, fungi, worms, and other organisms.
Rewrite the following sentence, choosing the right word from the options given below:
_______soils are those which are undisturbed by erosion or deposition.
What are the various factors governing the formation of soil? Which one is the most important and why?
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 |
How does frost action cause weathering?
Describe the work of plants as agents of weathering.
State the effects of weathering.
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.
Give a geographical reason:
Temperature is the main factor behind granular weathering.
Give a geographical reason:
Human is an agent of weathering.
Give a geographical reason:
Slope is a major factor in mass wasting.
