The Atmosphere

Front

What is the most abundant gas in the Earth's atmosphere?

Back

Nitrogen

Front

What percentage of the atmosphere is composed of oxygen?

Back

21%.

Front

What is air pressure?

Back

Air pressure is the force that air exerts on a surface or object.

Front

Is water present in the atmosphere?

Back

True.

Front

What is altitude?

Back

Altitude is the height of an object above the ground or sea level.

Front

What are the main layers of the Earth's atmosphere?

Back

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

Front

What is the role of the ozone layer in the atmosphere?

Back

The ozone layer protects living organisms by absorbing most of the sun's harmful ultraviolet radiation.

Front

How does temperature change with altitude in the troposphere?

Back

Temperature generally decreases with altitude in the troposphere.

Front

What is the greenhouse effect?

Back

The greenhouse effect is the warming of the Earth's surface due to the trapping of heat by greenhouse gases in the atmosphere.

Front

What are greenhouse gases?

Back

Greenhouse gases are gases that trap heat in the atmosphere, including carbon dioxide, methane, and water vapor.