Question 1

What component does air have that is essential for living things to

survive?

Accepted Answer

oxygen

Answer

ammonia

Answer

carbon monoxide

Answer

nitrogen

Question 2

What makes our air polluted?

Accepted Answer

Burning of gasoline and diesel by vehicles and factories.

Answer

Use of electric appliances at home.

Answer

Spraying the farms with pesticides to kill the pests.

Answer

Cutting of trees in the forests.

Question 3

In what way air pollution affects the plants?

Accepted Answer

Slow down the growth of the plants.

Answer

Source of organic fertilizer for the plants.

Answer

Protects the plants from being eaten by the animals.

Answer

Make plants good for animals to eat.

Question 4

Which of the following will NOT be the result of overcrowding?

Accepted Answer

Organisms grow very healthy.

Answer

Resources will be in limited supply.

Answer

There is equal sharing of resources.

Answer

Diseases spread easily.

Question 5

Why is sunlight very important to the ecosystem?

Accepted Answer

It is needed when plants make food.

Answer

Oxygen is produced when there is sunlight.

Answer

Makes water become warm.

Answer

Sunlight makes us see things around us.

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