Pollution of Air and Water Worksheet-9

Pollution of Air and Water Worksheet-9

1. Gases in the Earth's atmosphere prevent heat from going out into space. They keep the Earth warm. When a forest is burnt, more of these gases are released into the atmosphere. This may cause _____

(i)   Some organisms to die                          

(ii)  The Earth to get warmer,

(iii) Plants to stop making food.                  

(iv) Changes in weather patterns

(a) Some organisms to die & The Earth to get warmer,

(b) The Earth to get warmer & Plants to stop making food

(c) Some organisms to die, The Earth to get warmer & Plants to stop making food

(d) Some organisms to die, The Earth to get warmer & Changes in weather patterns

2. Which of the containers given in the figure will continue to have healthy fish and plants at the end of a week?

(a)                  (b)

(c)                  (d)

3. The given graph shows the amount of pollutants in four rivers P, Q, R and S. The river that can continue to support the most number of aquatic plants and animals is river

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

4. Trees are planted along the roadside to reduce pollution from motor vehicles. How do trees help to reduce pollution?

(i)   They absorb traffic noise.

(ii)  They take in carbon dioxide.

(iii) They trap dust and soot from the exhaust pipes of vehicles.

(a) They absorb traffic noise & They take in carbon dioxide

(b) They take in carbon dioxide & They trap dust and soot from the exhaust pipes of vehicles

(c) They absorb traffic noise &They trap dust and soot from the exhaust pipes of vehicles

(d) They absorb traffic noise, They take in carbon dioxide & They trap dust and soot from the exhaust pipes of vehicles

5. Study the graph. W, X, Y and Z represent the number of aquatic animals found in four different ponds over a fixed period of time. The river likely to have been most polluted is river ________ .

(a) W                  (b) X                   (c) Y                    (d) Z

6. Which one of the following shows the incorrect solution to the problem?

(a) (ii) only                                     (b) (iii) only

(c) (i), (ii) & (iv)                            (d) All of these

7. Which one of the following is not one of the harmful substances emitted from the exhaust pipes of vehicles?

(a) Lead particles                         (b) Nitrogen

(c) Carbon monoxide                  (d) Sulphur dioxide

8. Why will marine organisms be affected when there is an oil spillage at sea?

(a) There will be a shortage of light and heat in the water

(b) There will be a shortage of oxygen and excessive heat will be trapped in the water

(c) There will be a shortage of oxygen and the chemicals from the oil will affect marine organisms

(d) There will be a shortage of carbon dioxide and the poisonous substances will affect marine organisms

9. Which one of the following graphs shows the likely relationship between the changes in the percentage of pollution to the activities carried out by man in a particular town?

(a)         (b)

(c)         (d)

10. The houses in the picture are right across the road in an industrial area. Which of the following shows the two kinds of pollution that the people living in these houses face everyday?

(a) Noise pollution and air pollution

(b) Land pollution and water pollution

(c) Land pollution and noise pollution

(d) Water pollution and air pollution

Answer Key:

(1)-(d); (2)-(a); (3)-(a); (4)-(d); (5)-(d); (6)-(c); (7)-(b); (8)-(c); (9)-(c); (10)-(a)