Composition of the Atmosphere

True or False: As you increase in altitude, the temperature of the air decreases because the air molecules become less dense.

• True

• False

Tags

NGSS.MS-PS3-4

Which gas is represented by Gas #1?

• Oxygen

• Carbon dioxide

• Argon

• NItrogen

Tags

NGSS.MS-PS1-1

Which of the following is found in our atmosphere?

• water vapor

• dust and pollen

• gases

• all of the above

Tags

NGSS.MS-ESS2-4

Which gas makes up the largest component of the Earth’s atmosphere?

• argon (Ar)

• oxygen (O₂)

• nitrogen (N₂)

• carbon dioxide (CO₂)

Generally, as altitude increases, temperature ___.

• Increases

• Decreases

• Fluctuates

• Stays constant (the same)

Which layer of the atmosphere has the highest density of gas molecules?

• Exosphere

• Mesosphere

• Stratosphere

• Thermosphere

• Troposphere

What is the percentage of oxygen in Earth's atmosphere?

• 1%
• 21%
• 78%
• 90%

What is the percentage of nitrogen in Earth's atmosphere?

• 1%
• 21%
• 78%
• 90%

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 composition of air consists of __________ key components.

• seven

• three

• ten