Question

1. Addition of unwanted substance mostly by humans is called
a) Pollution
b) environment c) garbage
2. This is an unwanted substance
a) Soil
b) garbage
c) water
3. Unwanted substances the quality of the environment.
a) Reduce
b) increase
c) improve
4. When smoke is emitted by the industries and vehicles, pollution is caused.
al Air b) land c) water
5. All living things need
a) Bad
b) stale c) fresh
6. Breathing air leads to health problems.
a) Pure
b) impure c) good
7. Use of can reduce air pollution
a) Cars b) bicycles c buses
8. Planting trees reduces
a) Pollution
b) environment c) air
9. When substances are added, water becomes impure
a) Harmless b) harmful
c) good
10. Any unpleasant and loud sound is called
a) Sound
b) music
c) noise​

Answer 1

Answer:

1.a

2.b

3.a

4.b

5.c

6.b

7.b

8.a 9.b. 10c

Answer 2

Answer:

1.pollution

2.garbage

3.reduce

4.air

5.bad

6.impure

7.bicycle

8.polluction

9.harmful

10.noise

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