Earth's Atmosphere

Which gas makes up 78% of our atmosphere?

• oxygen

• Carbon dioxide

• nitrogen

• argon

Which layer of the atmosphere does all weather occur?

• exosphere

• troposphere

• mesosphere

• thermosphere

Which layer of the atmosphere helps us by burning up incoming meteors?

• exosphere

• troposphere

• mesosphere

• thermosphere

Which layer of the atmosphere contains the ozone layer?

• troposphere

• thermosphere

• methosphere

• stratosphere

A compound made of three oxygen atoms is called

• acid rain

• smog

• ozone

• carbon dioxide

How did scientists determine where the layers of the atmosphere are divided?

• a change in elements

• a change in compounds

• a change in temperature

• a change in ozone

Why do your ears pop when on an airplane?

• more radiation by being closer to the sun

• more ozone in the air as the altitude increases

• damage due to hydrogen in the air

• a change in air pressure

Which layer of the atmosphere, as identified by the chart, is MOST likely the troposphere?

• A

• B

• C

• D

The layers of gases that surround the earth is known as

• smog

• currents

• radiation

• the atmosphere

Satellite's orbit which layer of our atmosphere?

• thermosphere

• stratosphere

• troposphere

• mesosphere