This variable is used to separate the layers of the atmosphere.

• mass

• pressure

• volume

• temperature

This is the most common gas in the atmosphere.

• Nitrogen

• Oxygen

• Silicon

• Carbon

This is the second most common gas in the atmosphere.

• Nitrogen

• Oxygen

• Silicon

• Carbon

This layer of the atmosphere is the most dense.

• troposphere

• stratosphere

• mesosphere

• thermosphere

The Greenhouse Effect occurs in this layer of the atmosphere

• troposphere

• stratosphere

• mesosphere

• thermosphere

The ozone layer is in this layer of the atmosphere

• troposphere

• stratosphere

• mesosphere

• thermosphere

This is the coldest layer in the atmosphere

• troposphere

• stratosphere

• mesosphere

• thermosphere

This is the warmest layer in the atmosphere, though you would not feel the heat!

• troposphere

• stratosphere

• mesosphere

• thermosphere

This layer of the atmosphere protects Earth from meteoroids.

• troposphere

• stratosphere

• mesosphere

• thermosphere

This layer of the atmosphere is where large jet planes fly.

• troposphere

• stratosphere

• mesosphere

• thermosphere