Exploring Earth's Atmosphere Layers

What is the primary component of Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Water Vapor

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

• Stratosphere

• Mesosphere

• Troposphere

• Thermosphere

What is the main function of the ozone layer in the stratosphere?

• To support bird flight

• To absorb harmful ultraviolet radiation

• To create weather patterns

• To produce oxygen

In which layer of the atmosphere do meteor showers occur?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What is the Kármán Line?

• The boundary between the troposphere and stratosphere

• The altitude at which a spacecraft enters outer space

• The line where the exosphere ends

• The point where air pressure is highest

Which layer of the atmosphere contains the International Space Station?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

What percentage of Earth's atmosphere is made up of oxygen?

• 78%

• 21%

• 1%

• 50%

Why is the exosphere considered part of Earth's atmosphere?

• It contains the most gases

• It is where weather occurs

• It has more molecules than space

• It is the warmest layer