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What gases are most abundant in the air?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon Dioxide

The fact that the turbine can rotate indicates which property of air?

• Air has weight

• Air has substance

• Air has pressure

• Air has temperature

Air transportation will travel at what?

What property of air is demonstrated by the rotation of the turbine?

• Air has weight

• Air has substance

• Air has pressure

• Air has temperature

At which layer of the atmosphere does air transportation occur?

• Troposphere

• Stratosphere

• Ionosphere

• Exosphere

What instrument is used to measure the pressure of air mass?

• Thermometer

• Barometer

• Hygrometer

• Altimeter

What is the benefit of ozone gas in the atmosphere?

• Helps synthesize CFCs in the air

• Absorbs infrared radiation that causes global warming

• Absorbs ultraviolet radiation that causes skin cancer

• Purifies the air on Earth to eliminate various pathogens

Why can the thermosphere be used for communication?

• It has charged particles that can reflect radio waves

• It has little water vapor, making it easier for radio waves to pass

• It has thick clouds that help reflect radio waves

• It has less ultraviolet radiation, allowing radio waves to pass through

Which layer of the atmosphere has a decreasing temperature with height from the Earth's surface?

Which layer of the atmosphere has a temperature that decreases with height from the Earth's surface?

• Troposphere and Mesosphere

• Stratosphere and Thermosphere

• Troposphere and Stratosphere

• Mesosphere and Thermosphere