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Comprehension Checkup

Choose the best answer.

1 What is this story mainly about?

a. how cars pollute the air
b. problems from excess fertilizer

c. how garbage pollutes the soil

d. the causes and effects of pollution

2 What traps heat from sunlight?

a. water pollution from algae b. water polluted by fertilizer

c. air pollution from cars d. land polluted by garbage

3 What can carry excess fertilizer to streams and lakes?
a. rain b. air c. trucks d. garbage

4 When algae decay, what do they use?

a. waste b. smog c. fuel d. oxygen

5 When the soil becomes polluted, it can cause .

a. the Earth to trap heat from sunlight
b. diseases in both humans and animals

c. algae to grow excessively in streams and lakes

d. the oxygen that other animals and plants need

6 What can we do to stop pollution?
a. Ride in cars for short trips.

b. Use recycled paper napkins.

c. Throw waste into the ocean.
d. Throw plastic cups into garbage cans.

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