Front

What is the coldest layer of the atmosphere?

Back

Mesosphere

Front

What gas makes up 78% of the gases in the troposphere?

Back

Nitrogen

Front

What is the ionized part of the upper atmosphere of Earth called?

Back

Ionosphere

Front

How does temperature change as elevation increases in the stratosphere?

Back

Temperature increases.

Front

What is the layer closest to Earth?

Back

Troposphere

Front

What is the layer of the atmosphere where weather occurs?

Back

Troposphere

Front

What is the second layer of the atmosphere above the troposphere?

Back

Stratosphere

Front

What is the layer of the atmosphere that contains the ozone layer?

Back

Stratosphere

Front

What is the uppermost layer of the atmosphere?

Back

Exosphere

Front

What is the layer of the atmosphere that is above the mesosphere?

Back

Thermosphere