Earth's Atmosphere

Front

What is the most common gas in the atmosphere? Options: nitrogen, oxygen, water vapor, carbon dioxide

Back

nitrogen

Front

Oxygen makes up approximately ____% of the gases in the atmosphere.

Back

20

Front

What decreases with altitude throughout Earth's atmosphere?

Back

density and pressure

Front

What is the correct order of earth's atmospheric layers from bottom to top?
Options: Stratosphere, Mesosphere, Troposphere, Thermosphere, Exosphere; Stratosphere, Troposphere, Mesosphere, Thermosphere, Exosphere; Stratosphere, Troposphere, Thermosphere, Mesosphere, Exosphere; Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere.

Back

Troposphere, Stratosphere, Mesosphere, Thermosphere, Exosphere.

Front

Why is atmospheric pressure greatest in the troposphere?

Back

gravity compresses the atmosphere as it pushes the gases down

Front

The layers of Earth's atmosphere are determined by changes in _________.

Back

temperature

Front

Which layer of the atmosphere has the highest density of gas molecules and highest atmospheric pressure? Options: troposphere, mesosphere, stratosphere, thermosphere

Back

troposphere

Front

What is the atmospheric layer closest to the surface? Options: troposphere, stratosphere, mesosphere, thermosphere

Back

troposphere

Front

Directly above the troposphere is the _________. Options: stratosphere, mesosphere, exosphere, thermosphere

Back

stratosphere

Front

What does the ozone layer do?

Back

It protects us from ultra violet radiation