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CHAPTER4: SOIL

TOPIC- SOIL EROSION

OBJECTIVE QUESTIONS:

1) Fill in the blanks.

a) ………………. and …………………………. causes soil erosion.

b)……………………….. is washed away in case of heavy rain and flood.

c) In deserts and open land…………………………causes soil erosion.

d) Cutting of ………………………also causes deforestation.

e) Removal of the fertile topsoil by wind and water is called…………………………….

2) State true or false.

a) Running water causes least amount of soil erosion…………………..

b) Ploughing of the hills for cultivation reduces soil erosion……………………

c) Leaving the soil bare prevents the soil erosion…………………………..

d) Deforestation do not destroy the soil……………………

e) Only water and wind are agents of soil erosion…………………….

3) What can occur at the site of an area that is experiencing soil erosion?

a. Vegetation is able to grow easily.
b. Water pollution is cleared up.
c. Crops are planted at an off-site location.
d. The soil quality is reduced.

4)A class planted tree saplings and small plants in a bare field beside their school. This action helps in
protecting the soil from ____________.

a. Overgrazing
b. Weathering
c. Deforestation
d. Erosion

SUBJECTIVE QUESTIONS:

1)Match the following