Quiz (Air Pollution)

Directions: Read each item carefully. Choose the letter of the best answer from the given choices.
1. Living things on earth are protected from harmful radiation from the sun by:
A. clouds
B. ozone layer
C. atmosphere
D. carbon dioxide in the air
2. What are greenhouse gases?
A. gases that harm the earth
B. gases that we breathe
C. gases that trap the energy in the atmosphere
D. gases that keep the atmosphere cool
3. Which of the following gases depletes ozone in the atmosphere?
A. CFCs
B. halons
C. methyl chloroform
D. hydrocarbon
4. All of the following are part of ozone depletion to human health except
A. It can cause sunburn and premature aging of the skin
B. It can cause cataract
C. It can lower bad cholesterol
D. It can cause skin cancer
5. What is meant by trace gases?
A. They are not harmful.
B. They are emitted by trees.
C. They are naturally occurring on Earth
D. They are present in very small amounts.



Answer:
1. B
2. C
3. A
4. C
5. D