The Ozone Layer

The video explains the ozone layer's role in protecting Earth from harmful UV-B light, the causes of its depletion, primarily due to CFCs, and the subsequent recovery efforts. It highlights the impact of climate change on the ozone layer's ability to repair itself, noting that while ozone depletion doesn't cause global warming, climate change affects ozone recovery. The video also discusses the historical context of CFC usage and the observed changes in the ozone hole over Antarctica.

What is the primary function of the ozone layer in the stratosphere?

• To produce oxygen

• To block ultraviolet B light

• To regulate Earth's temperature

• To absorb carbon dioxide

Which atom is most responsible for breaking down ozone molecules?

• Hydrogen

• Carbon

• Nitrogen

• Chlorine

What was the main source of chlorine that contributed to ozone depletion?

• Industrial waste

• Forest fires

• Chlorofluorocarbons (CFCs)

• Volcanic eruptions

How did the size of the ozone hole change after the reduction in CFC usage?

• It increased significantly

• It remained the same

• It decreased

• It disappeared completely

How does climate change affect the ozone layer's ability to repair itself?

• By increasing greenhouse gases in the stratosphere

• By cooling the stratosphere

• By reducing UV-B light

• By increasing ozone production