Atmosphere

Take a deep breath in, take a deep breath out. Most of the gas that passed through your mouth was

• oxygen

• nitrogen

• water vapor

• carbon dioxide

This gas is found in the stratosphere where it helps protect us from UV radiation.

• ozone

• oxygen

• nitrogen

• carbon dioxide

The circle graph represents the gases in our atmosphere. What gas is represented by the green section in the circle?

• ozone

• hydrogen

• nitrogen

• carbon monoxide

The Earth's atmosphere is divided into five layers. In which layer does all life exist?

• exosphere

• mesosphere

• stratosphere

• troposphere

Which layer of Earth's atmosphere contains the ozone layer, an important layer that helps protect life on Earth from UV radiation

• exosphere

• mesosphere

• stratosphere

• troposphere

What is a true fact about the mesosphere?

• it is the hottest layer
• meteors burn up here
• the ozone layer is found here
• Northern Lights happen here

How does air pressure change as you climb a mountain?

• it decreases (less air pressure)

• it increases (more air pressure)

• stays the same

• the temperature gets warmer

The Northern Lights occur in which layer?

• mesosphere
• exosphere
• thermosphere
• stratosphere

What layer comes next:
Troposphere - 
stratosphere -
?????

• mesosphere
• exosphere
• thermosphere
• ionosphere

What gas makes up the majority of the atmosphere?

• oxygen

• nitrogen

• water vapor

• carbon dioxide