Page 104 - Science - 5

Ploughing : turning up the soil by plough or machines.
Vegetation : an act or process of growing plants

Chapter at a Glance

³ Soil consists of three layers, that are topsoil, subsoil and bedrock.
³ The process of carrying away of topsoil from one place to another by wind, rain or
flowing water is called soil erosion.
³ Various human activities cause soil pollution.
³ Soil is formed by breaking up of rocks into very small particles. This is called
weathering.
³ Soil can be conserved by afforestation, growing trees and grasses, terrace farming on
hill slopes and by constructing dams across the rivers.
³ Deforestation, ploughing and overgrazing by animals increase soil erosion.

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Based on The Latest Pattern of New Education Policy 2020.
Based on The Latest Pattern of New Education Policy 2020.
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Based on The Latest Pattern of New Education Policy 2020.
Based on The Latest Pattern of New Education Policy 2020.
Based on The Latest Pattern of New Education Policy 2020.
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You And Your Text
You And Your Text
Fill in the blanks with the correct word :
terrace farming vegetation insecticides; pesticides soil erosion rock
1. On hill slopes, soil erosion is prevented by _____________ .
2. Breaking up of _____________ into tiny pieces forms soil.

3. Carrying away of the topsoil by wind, rain or flowing water is called __________ .
4. Soil erosion due to wind is greatest in areas where there is less _____________ .

5. The excessive use of __________ and __________ in fields cause soil pollution.

Matching : Patching
Matching : Patching

Match the following :

Column ‘A’ Column ‘B’

1. Soil erosion (a) Weathering
2. Afforestation (b) Fertile
3. Soil formation (c) Planting trees

4. Humus (d) Cutting of trees

5. Deforestation (e) Low soil fertility

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