What is the thin layer of gases that surround our planet called?

• hydrosphere
• atmosphere
• lithosphere
• ionosphere

Which gas makes up 78% of the air we breathe?

• Oxygen
• Argon
• Nitrogen
• Carbon Dioxide

Which layers of the atmosphere do jets fly?

• troposphere and exosphere

• mesosphere and thermosphere

• troposphere and stratosphere

Which layer of the atmosphere is where weather occurs?

• troposphere
• mesosphere
• thermosphere
• stratosphere

What occurs in the mesosphere?

• where jets fly
• weather
• where most meteors burn up
• satellites

How much Oxygen is in our air?

• 78%
• 21%
• 1%
• 100%

In what layer would you find the ozone layer?

• thermosphere
• troposphere
• mesosphere
• stratosphere

What is in the ionosphere?

• Northern Lights/Aurora Borealis
• weather
• ozone layer
• satellites

In what layer would you find satellites and the space station?

• Exosphere

• Troposphere
• Mesosphere
• Stratosphere

True or False:  Atmosphere protects Earth from harmful rays and meteors.

• True
• False