Unit 4: The Atmosphere Study Guide (Enviromental Science)

Front

How did Earth's early atmosphere form?

Back

Through volcanic eruptions.

Front

What is a large source of air pollution created by humans?

Back

Burning fossil fuels.

Front

What is the main reason for the depletion of the ozone layer?

Back

Chlorofluorocarbons (CFCs).

Front

Name the layer that contains the ozone layer.

Back

Stratosphere.

Front

What gas was missing in Earth's early atmosphere?

Back

Oxygen.

Front

Define the term 'atmosphere'.

Back

The layer of gases surrounding a planet.

Front

What is the function of the ozone layer?

Back

To protect Earth from harmful ultraviolet (UV) radiation.

Front

What are chlorofluorocarbons (CFCs)?

Back

Chemical compounds used in refrigeration and aerosol propellants that deplete the ozone layer.

Front

What is the troposphere?

Back

The lowest layer of Earth's atmosphere where weather occurs.

Front

What is air pollution?

Back

The presence of harmful substances in the atmosphere.