Exploring Earth's Atmosphere

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

• 78%

• 21%

• 5%

• 10%

Which gas is essential for the process of photosynthesis?

• Oxygen

• Nitrogen

• Carbon dioxide

• Helium

What causes air pressure?

• The weight of air

• Height from sea level

• Temperature changes

• Ocean depth

Which layer of the atmosphere is closest to Earth?

• Exosphere

• Mesosphere

• Troposphere

• Stratosphere

Where is the ozone layer located?

• Mesosphere

• Exosphere

• Stratosphere

• Troposphere

What phenomenon occurs in the mesosphere?

• Cloud formation

• Meteor showers

• Ozone layer protection

• Auroras

At what altitude does the thermosphere start?

• 50 km

• 700 km

• 80 km

• 12 km

Which layer of the atmosphere contains the International Space Station?

• Mesosphere

• Exosphere

• Thermosphere

• Stratosphere

What is the Kármán Line?

• The boundary between the mesosphere and thermosphere

• The highest point in the stratosphere

• The point where Earth's atmosphere ends

• The altitude at which a spacecraft enters outer space

What is the primary function of Earth's atmosphere?

• To support life

• To generate heat

• To provide light

• To create weather patterns