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Subjects
Science CBSE
Class 9
Natural resources
Textbook questions

28. NCERT Exemplar X

Exercise condition:

3 m.

1. Soil erosion can be prevented by

deforestation
raising forests
overgrazing by animals
excessive use of fertiliser

2. What happens when rain falls on soil without vegetational cover?

Rain water percolates in soil efficiently
Rain water leads to fertility of the soil
Rain water causes loss of surface soil
Rain water does not cause any change in soil

3. Oxygen is harmful for

nitrogen fixing bacteria
ferns
Chara
mango tree

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