This layer of the atmosphere contains most of the ozone.

• troposphere
• thermosphere
• mesosphere
• stratosphere

Which of the following is the correct order of the atmosphere layers from Earth to space?

• troposphere, stratosphere, mesosphere, thermosphere, exosphere
• troposphere, mesosphere, thermosphere, exosphere, stratosphere
• thermosphere, stratosphere, mesosphere, troposphere, exosphere
• troposphere, stratosphere, mesosphere, exosphere, thermosphere

This is the coldest layer of the atmosphere.

• troposphere
• thermosphere
• mesosphere
• stratosphere

This layer is where satellites are found.

• thermosphere
• exosphere
• stratosphere
• mesosphere

This layer is where weather occurs.

• troposphere
• thermosphere
• exosphere
• stratosphere

Planes fly in this layer to get out of the weather.

• stratosphere
• mesosphere
• exosphere
• thermosphere

This layer is the hottest.

• troposphere
• mesosphere
• stratosphere
• thermosphere

What are the 2 most abundant gases in Earth's atmosphere?

• carbon dioxide and oxygen
• carbon dioxide and nitrogen
• nitrogen and oxygen
• nitrogen and hydrogen 

The layers of the atmosphere are classified according to changes in _________.

• altitude
• density
• composition
• temperature

What happens to air pressure as you go higher in the atmosphere?

• It increases.
• It decreases.
• It stays the same.
• It increases and then decreases.