Earth's Atmosphere Quiz

What is the primary gas in the Earth's atmosphere?

• Oxygen

• Carbon dioxide

• Nitrogen

• Argon

What percentage of the Earth's atmosphere is composed of Oxygen?

• 78%

• 21%

• 1%

• 10%

Which layer of the atmosphere is directly above the troposphere?

• Stratosphere

• Mesosphere

• Thermosphere

• Exosphere

At approximately what altitude does the mesosphere start?

• 50 km

• 80 km

• 85 km

• 100 km

In which layer of the atmosphere does temperature start to increase with altitude?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Which layer of the atmosphere is the one in which all life exists?

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

Where does all of our weather occur?

• In the stratosphere

• In the mesosphere

• In the thermosphere

• In the troposphere

Which statement is true about the troposphere?

• It contains very little air.

• It is where most of the air is located.

• It has no impact on weather.

• It is devoid of any life forms.

Which layer of the Earth's atmosphere is closest to the surface?

• Mesosphere

• Stratosphere

• Troposphere

• Thermosphere

What happens to temperatures as altitude increases in the troposphere?

• Temperatures increase

• Temperatures stay the same

• Temperatures fluctuate unpredictably

• Temperatures decrease