Ozone Layer Dynamics and Its Impact on Life

The video explains the difference between good and bad ozone, highlighting the protective role of stratospheric ozone against UV radiation. It discusses the formation and degradation of ozone, measured in Dobson units, and the impact of CFCs, which release chlorine atoms that deplete ozone. The video details the health risks of increased UV exposure due to ozone depletion, such as skin cancer and eye damage. It concludes with international efforts like the Montreal Protocol to curb ozone-depleting substances.

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

• To produce chlorofluorocarbons

• To absorb ultraviolet radiation

• To release oxygen

• To absorb carbon dioxide

How is the thickness of the ozone layer measured?

• In meters

• In atmospheric pressure

• In parts per million

• In Dobson units

What role do CFCs play in the depletion of the ozone layer?

• They increase the production of ozone

• They have no effect on the ozone layer

• They directly absorb UV radiation

• They release chlorine atoms that degrade ozone

Which region is most affected by the ozone hole?

• The Arctic

• The Antarctic

• The Equator

• The Tropics

What type of radiation is primarily responsible for DNA damage?

• Infrared radiation

• Gamma rays

• Visible light

• UVB radiation

What is a potential effect of UVB radiation on human skin?

• Improved elasticity

• Increased melanin production

• Skin hydration

• Skin aging and cancer

What is snow blindness cataract caused by?

• High doses of UVB radiation

• Excessive visible light exposure

• Excessive infrared exposure

• Lack of vitamin D

What was the purpose of the Montreal Protocol?

• To control the emission of ozone-depleting substances

• To ban all forms of radiation

• To promote the use of fossil fuels

• To increase the production of CFCs

When was the Montreal Protocol signed?

• 1990

• 1995

• 1985

• 1987

What is a key feature of the Montreal Protocol?

• It applies only to developed countries

• It focuses solely on carbon emissions

• It provides separate roadmaps for developed and developing countries

• It bans all industrial activities