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Q&A HomeClass 7CBSEScienceForests Our Lifeline
🔬
Chapter 12

Forests Our Lifeline

Science•Class 7•CBSE

22 Questions Available

Showing 20 questions on this page

1

What is sewage? Explain why it is harmful to discharge untreated sewage into rivers or seas?

15 views0 helpful
2

Explain how animals dwelling in the forest help it grow and regenerate.

14 views0 helpful
3

What are decomposers? Explain with example.

9 views0 helpful
4

Untreated human excreta are a health hazard. Justify the statement.

7 views0 helpful
5

Explain how forests prevent floods.

6 views0 helpful
6

What do you understand by the term "sewerage"?

6 views0 helpful
7

List few ways to control sewage generation.

6 views0 helpful
8

Discuss the role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere.

6 views0 helpful
9

What is sludge and

how is it treated?

6 views0 helpful
10

Explain why there is a need of variety of animals and plants in a forest?

6 views0 helpful
11

There is no waste in a forest. Explain

6 views0 helpful
12

What is a clarifier?

5 views0 helpful
13

Why forest floor seemed to be dark coloured?

5 views0 helpful
14

What are the adverse effects of drinking contaminated water?

4 views0 helpful
15

What is sewage and sewage treatment?

4 views0 helpful
16

Explain why is it harmful to discharge untreated sewage into Water bodies?

4 views0 helpful
17

What do you mean by

waste water?

4 views0 helpful
18

Enlist the various

causes of water pollution.

4 views0 helpful
19

Explain the importance of forest.

3 views0 helpful
20

Explain the various steps involved in water treatment plant.

3 views0 helpful
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