Unit 203 Aerodynamics and control in fixed-wing aircraft

What is the average pressure at sea level in the Earth's atmosphere?

• 950 hPa

• 1013 hPa

• 1050 hPa

Which gas makes up the largest percentage of the Earth's atmosphere?

• Oxygen

• Nitrogen

• Carbon dioxide

At what altitude does the troposphere typically end?

• 10 km

• 15 km

• 20 km

What is the primary function of the ozone layer in the atmosphere?

• Regulate temperature

• Absorb ultraviolet radiation

• Trap greenhouse gases

Which layer of the atmosphere contains most of the Earth's weather phenomena?

• Troposphere

• Stratosphere

• Mesosphere

What is the typical lapse rate in the troposphere?

What happens to air pressure as altitude increases?

• Decreases

• Increases

• Remains constant

Which atmospheric layer is directly above the troposphere?

• Stratosphere

• Mesosphere

• Thermosphere

What is the significance of the tropopause?

• It is the boundary between the mesosphere and the thermosphere

• It is the boundary between the troposphere and the stratosphere

• It is the highest layer of the atmosphere

Which gas is responsible for the greenhouse effect in the Earth's atmosphere?

• Nitrogen

• Carbon dioxide

• Oxygen