All Flashcards
What are the steps of the natural ozone cycle?
- O3 splits into O + O2. 2. O + O2 reforms into O3.
How do CFCs destroy ozone?
- UV radiation breaks Cl off CFC. 2. Cl + O3 -> ClO + O2. 3. ClO + O3 -> Cl + 2 O2.
What is the role of the ozone layer?
To absorb harmful ultraviolet (UV) radiation from the sun.
Why are CFCs harmful to the ozone layer?
They release chlorine atoms that catalyze ozone destruction.
What is the natural ozone cycle?
The continuous splitting and reforming of ozone molecules.
Why is the ozone layer important for life on Earth?
It protects living organisms from harmful UV radiation.
How does UV radiation affect human health?
It can cause skin cancer and cataracts.
Why were CFCs initially used?
They were used in aerosol sprays and refrigerants due to their stability.
What property of CFCs allows them to reach the stratosphere?
Their high stability prevents them from breaking down in the lower atmosphere.
What are the effects of increased UV radiation?
Increased skin cancer, cataracts, damage to ecosystems, and harm to marine life.
What is the impact of CFCs on the ozone layer?
CFCs cause significant ozone depletion, leading to increased UV radiation reaching the Earth's surface.
What are the consequences of ozone depletion?
Increased UV radiation, leading to higher rates of skin cancer, cataracts, and damage to ecosystems.