Science Exam Earth's Atmosphere

Which gas in our atmosphere is most abundant?

• Argon
• Oxygen
• Nitrogen
• Carbon Dioxide

This layer of the atmosphere contains most of the ozone.

• troposphere
• thermosphere
• mesosphere
• stratosphere

This gas makes up 78% of the atmosphere

• oxygen
• nitrogen
• ozone
• carbon dioxide

This is the coldest layer of the atmosphere.

• troposphere
• thermosphere
• mesosphere
• stratosphere

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 temperature in the stratosphere ________.

• increases as you reach the ozone layer
• is cold all the way up
• decreases as you reach the ozone layer
• stays the same through the layer

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.

James plans to climb to the top of Mount Everest.  Which of the following statements about his climb will be the most accurate?

• Air pressure will rise and the temperature on a thermometer will increase.
• Air pressure will fall and the temperature on a thermometer will decrease.
• Air pressure will rise and the temperature on a thermometer will decrease.
• Air pressure and thermometer will not change.

Where is the altitude the greatest?

• 1
• 2
• 3
• 4