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Subjects
Science CBSE
Class 9
Natural resources
Textbook questions

22. NCERT Exemplar IV

Exercise condition:

3 m.

1. One of the following processes is not a step involved in the water-cycle operating in ‘ nature.

Evaporation
Precipitation
Photosynthesis
Transpiration

2. The term 'water-pollution' can be defined in several ways. Which of the following statements does not give the correct definition?

A change in temperature of the water bodies
The removal of desirable substances from water-bodies
The addition of undesirable substances to water-bodies
A change in pressure of the water bodies

3. Which of the following is not a greenhouse gas?

Ammonia
Carbon dioxide
Carbon monoxide
Methane

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