The Ozone Layer

Front

What is the stratosphere?

Back

The second layer of the atmosphere, extending about 17-48 kilometers above the earth’s surface, containing a layer of gaseous ozone that filters out about 95% of harmful ultraviolet radiation.

Front

What is the troposphere?

Back

The innermost layer of the atmosphere, containing about 75% of the mass of earth’s air, extending about 17 kilometers above sea level.

Front

How many ozone atoms can a single chlorine atom break down?

Back

100,000

Front

What was the purpose of the Montreal Protocol?

Back

To ban the use of CFCs in order to make the ozone hole smaller.

Front

What does the ozone layer protect us from?

Back

Harmful UV rays from the sun.

Front

What are CFCs?

Back

Chlorofluorocarbons, chemicals that deplete the ozone layer.

Front

What is the main function of the ozone layer?

Back

To absorb the majority of the sun's harmful ultraviolet radiation.

Front

What is UV radiation?

Back

Ultraviolet radiation is a type of electromagnetic radiation emitted by the sun, which can cause skin damage and increase the risk of skin cancer.

Front

What happens to the ozone layer when CFCs are released into the atmosphere?

Back

CFCs break down ozone molecules, leading to depletion of the ozone layer.

Front

What is the significance of the ozone hole?

Back

The ozone hole refers to the thinning of the ozone layer, particularly over Antarctica, which allows more UV radiation to reach the Earth's surface.