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The ozone layer is made of ___________

• oxygen

• carbon dioxide

• hydrogen

• nitrogen

Which of the symbols represents ozone?

• O₂^

• O₃

• Cl₂

• Cl₃

In which of the atmospheric layers is the ozone layer found?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Stratosphere is the ___________________

• first layer

• second layer

• third layer

• fourth layer

What are "holes" in the ozone layer?

• places where the ozone concentrations are higher than under normal conditions, allowing more UV radiation to reach the Earth's surface.

• places where the ozone concentrations are higher than under normal conditions, allowing less UV radiation to reach the Earth's surface.

• places where the ozone concentrations are lower than under normal conditions, allowing more UV radiation to reach the Earth's surface.

What does the ozone layer protect us from?

• air pollution

• greenhouse gases

• ultraviolet rays from the Sun

• Sunlight

Harmful ultraviolet radiation can cause

• lung diseases

• air pollution

• skin cancer

• skin cancer and eye damage

What do we call the main ozone depleting

chemicals?

• CFCs

• FFCs

• CCFs

Which products contain ozone depleting

substances?

(several correct answers)

• Air conditioners

• Refrigerators

• Ovens

• Motorbikes

• Aerosol cans

How do CFCs affect the ozone layer?

• By increasing the amount of ozone

• By reacting with ozone and breaking it down

• By releasing carbon dioxide