Env. Sc. 15.1-15.2

Air is made up mostly of

• oxygen

• nitrogen

• carbon

• hydrogen gas

Where is ozone most dangerous?

• thermosphere

• mesosphere

• stratosphere

• troposhere

Part of smog that is caused by burning fossil fuels and volcanoes

• sulfur dioxide

• nitrous oxide

• carbon dioxide

• ammonia

Human pollution is caused by

• solar powered homes

• electric cars

• hydroelectric electricity

• burning fossil fuels

The ozone layer protects us from

• UV rays
• CFCs
• Increased atmospheric heat
• Decreased atmospheric heat

Which of the following is a source of air pollution?

• Difficulty in breathing

• Factories

• Eye irritation

• Drinking water

Carbon monoxide is released from...

• human body

• plants

• vehicles

• styrofoam

This picture shows people walking through a highly-polluted city in China. From what type of pollution are they protecting themselves based on what they are wearing?

• air pollution
• water pollution
• land pollution
• noise pollution

Which of these problems can be caused by air pollution?

• Respiratory problems
• Reduced food sources for humans
• Increased disease for humans
• Decrease in global temperatures

Harmful ultraviolet radiation from the Sun is absorbed by

• clouds

• ozone molecules

• soil

• water