Pollution of Air and Water Worksheet-10

Pollution of Air and Water Worksheet-10

1. A man is stranded in a jungle. He wanted to boil some water for drinking. He collected one sample of water from each of the three rivers, P, Q and R. Study his observations given below.

Which of the rivers has/have water that is probably safe for drinking?

(a) P                    (b) Q & R           (c) P & Q            (d) All of these

2. What can you infer from the message below?

Save the Earth. Do not litter

(a) Littering causes fatal disease

(b) Littering is an offence

(c) Littering has caused depletion of natural resources

(d) Littering has caused some desirable consequences on Earth.

3. A gardener who burns dry leaves and weeds is causing pollution. He should not burn them but instead dispose them by _____.

(a) Throwing them into the river

(b) Burying them in the garden

(c) Throwing into the sewers

(d) Dumping them into the sea

4. The picture below shows a river flowing downstream towards the sea.

Situated near the river is a factory which occasionally discharges waste water into the river and a farm where pesticides are used. A water treatment plant which supplies water for home use is to be built. The water treatment plant treats water which is pumped into it from the point in the river that is nearest to it. Which position would be suitable for the treatment plant?

(a) P                    (b) Q                   (c) R                    (d) S

5. An oil spill covered a larger area of water in an ocean. The marine life in that area was badly affected. A lot of the marine animals were found dead and were floating on the surface of the water. This is because _____

(i)   They drank the water that was contaminated by the oil.

(ii)  The fish swallowed the oil and were poisoned.

(iii) They breathed in the oil fumes near the water surface and were suffocated.

(a) They drank the water that was contaminated by the oil

(b) They drank the water that was contaminated by the oil & The fish swallowed the oil and were poisoned

(c) They drank the water that was contaminated by the oil, The fish swallowed the oil and were poisoned & They breathed in the oil fumes near the water surface and were suffocated

(d) All of  these

6. Study the Venn diagram below. X is likely to be _______.

(a) A group of people smoking cigarettes

(b) Youngsters dancing in a disco

(c) A farmer spraying pesticides

(d) Construction work going on at a building site.

7. Study the table on "Pollution problem and solution". Which of the following is correct?

(a) (i) & (ii)                                    (b) (ii) & (iii)

(c) (i), (ii) & (iii)                           (d) (i), (ii) & (iv)

8. The 'green house effect' refers to the ______

(a) Building up of pollution in the atmosphere

(b) Gradual warming of the Earth's atmosphere

(c) Hole in the ozone layer

(d) Increase in human population on Earth.

9. Match the following

Answer Key:

1. (b)
2. (c)
3. (b)
4. (d)
5. (d)
6. (d)
7. (d)
8. (b)
9. A-R; B-V; C-T; D-P; E-U; F-Q; G-S