Atmosphere Unit: Part 1 - Atmosphere Composition & Layers

Front

What is the composition of the atmosphere?

Back

The atmosphere is composed of 78% nitrogen, 21% oxygen, and trace amounts of other gases such as carbon dioxide, argon, and water vapor.

Front

What is air pressure?

Back

Air pressure is the weight of air pushing down on the Earth's surface.

Front

Where is air pressure the most dense?

Back

Air pressure is most dense at sea level.

Front

What is humidity?

Back

Humidity is the amount of water vapor present in the air.

Front

True or False: There is water in the air.

Back

True.

Front

What happens to air pressure as altitude increases?

Back

Air pressure decreases as altitude increases.

Front

What are the main layers of the atmosphere?

Back

The main layers of the atmosphere are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.

Front

How does temperature change in the troposphere?

Back

In the troposphere, temperature decreases with altitude.

Front

What is the role of the ozone layer?

Back

The ozone layer protects the Earth from harmful ultraviolet (UV) radiation from the sun.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the process by which certain gases trap heat in the atmosphere, keeping the Earth warm.