Ozone Layer and UV Protection

The video explains how umbrellas protect us from sun and rain, and introduces the ozone layer as Earth's natural umbrella against harmful UV rays. It highlights the dangers of UV rays, such as skin cancer and environmental damage, and discusses how human activities, like using CFCs, harm the ozone layer. The video concludes with ways to protect the ozone layer by avoiding CFCs.

What dual purpose does an umbrella serve according to the introduction?

• Protects from rain and snow

• Shields from rain and sun

• Cools and warms the user

• Blocks wind and sun

Where is the ozone layer located in Earth's atmosphere?

• In the Thermosphere

• In the Mesosphere

• In the Troposphere

• In the Stratosphere

What is the primary function of the ozone layer?

• To absorb ultraviolet rays

• To produce oxygen

• To trap heat from the sun

• To reflect visible light

Which of the following is NOT a harmful effect of UV rays?

• Sunburns

• Increased plant growth

• Skin cancer

• Eye cataracts

What human activities are contributing to the destruction of the ozone layer?

• Using solar panels

• Planting trees

• Driving electric cars

• Using CFCs in old appliances

What are CFCs and how do they affect the ozone layer?

• They are pollutants that cause acid rain

• They are harmless gases used in refrigeration

• They are chemicals that react with and destroy ozone

• They are greenhouse gases that trap heat

What can individuals do to help protect the ozone layer?

• Cut down more trees

• Use products that contain CFCs

• Avoid using products with CFCs

• Increase the use of fossil fuels

What happens if there are holes in the ozone layer?

• More UV rays reach Earth, causing harm

• The Earth becomes cooler

• The ozone layer becomes thicker

• The Earth receives less sunlight