Ozone Depletion and the Montreal Protocol

What are chlorofluorocarbons (CFCs) known to do?

• Speed up the breakdown of ozone

• Increase the concentration of ozone

• Stabilize the ozone layer

• Have no effect on ozone

What happens when chlorine molecules in CFCs break down?

• Ozone is formed

• Chlorine atoms are released

• Oxygen is released

• CFCs become inert

Where are ozone depleting substances found?

• At ground level

• In the presence of UV radiation

• In the lower atmosphere

• In the stratosphere

What is the main cause of ozone depletion over Antarctica?

• High levels of CFC emissions

• Lack of ozone regeneration

• Atmospheric conditions specific to the region

• Absence of UV radiation

What is the average concentration of ozone in an ozone hole?

• Above 100 Dobson Units

• Exactly 100 Dobson Units

• Below 100 Dobson Units

• Zero Dobson Units

How are ozone-depleting substances distributed in the stratosphere?

• They are concentrated near the ground

• They are evenly distributed

• They are transported by wind

• They are found only in Antarctica

What impact does ozone depletion have on plant growth?

• Enhances plant growth

• Has no effect on plant growth

• Damages plant growth

• Stimulates plant growth

How does ozone depletion affect commercially used materials?

• Increases their strength

• Makes them more flexible

• Causes them to crack and disintegrate

• Has no effect on them

What happens to clothing materials when exposed to UV radiation?

• They become more durable

• They become more resistant to UV radiation

• They break down

• They become more colorful

What are the main consequences of increased UV radiation reaching Earth's surface?

• skin cancer

• Increased plant growth

• Formation of cataracts

• immune system suppression