Unit 9

Question 1

What does ozone in the Stratosphere do?

Answer 1

It absorbs UV-C and UV-B to sustain life on Earth, prevent cancer, and prevent cataracts

Question 2

What does ozone in the Troposphere do?

Answer 2

It is a respiratory irritant, damages plants, and contributes to photochemical smog

Question 3

How is ozone formed?

Answer 3

UV-C + O2 –> O + O
O+ O2 –> O3

Question 4

How is ozone broken down?

Answer 4

O3 –> O+O2
O + O –> UV-C + O2

Question 5

Where do CFCs come from?

Answer 5

Refrigeration, aerosols, styrofoam, etc.

Question 6

How do CFCs break down ozone?

Answer 6

UV breaks down Cls from CFCs and the Cls break down ozone

Cl + O3 –> ClO + O2
ClO + O3–> Cl 2O2

Question 7

What is the Greenhouse Effect?

Answer 7

When sunlight (infrared) hits the Earth surface. some reflects back, but greenhouse gases reflect the light back onto the surface

Question 8

What is the Kyoto Protocol?

Answer 8

Global agreement to decrease greenhouse gas emissions of which only 3 countries didn’t sign

Question 9

What are the four main greenhouse gasses in order of potency?

Answer 9

Carbon Dioxide, Methane, Nitrous Oxides, CFCs