Question

1. Water is a renewable resource. By which process is water recycled in nature?
2. The substances that pollute water or air are called
3. Sewage that is
(treated/untreated) causes water pollution.
4. Hot water discharge into rivers from factories is also a pollutant. True or false?
5. Give one word for 'enrichment of water of a lake or pond by nutrients that leads to excessive
plant growth'.
6. Can you safely drink potable water?
7. Name the kind of light that can kill germs.
8. Using less water and preventing water from getting polluted is called
of water.
9. Which polluting gas prevents the blood from carrying oxygen?
10. Carbon dioxide is the only greenhouse gas. True or false?
11. Chlorofluorocarbons damage the - layer in the atmosphere.
12. What is rain mixed with sulphuric acid or nitric acid called?
13. Which compound added to petrol to prevent engines from 'knocking' causes pollution of air?
14. Name one fuel that causes very little pollution.​

Answer 1

Answer:

a)water cycle

b)co2

c)untreated

d)false

e)fertile

f)yes

g)UVC LIGHT

h)water harvesting

i)carbone momoxide

jashawn

j)true

k)yes

l)acid rain

m)anti knock agents

n)CNG

Explanation:

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Answer 2

1. Water cycle

2. Pollutants

3. Untreated

4. False

5. Eutrophication

6. yes

7. UV light

8. Conservation

9. Carbon monoxide

10. False

11. Ozone layer

12. Acid rain

13. Lead

14. CNG

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