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6. What happens to atmospheric pressure with increasing altitude in the stratosphere and the mesosphere?
- it decreases
- it stays the same
- it increases
7. Why is the atmosphere so important to life on Earth?
- All of these :)
- winds create ocean currents
- helps maintain temperature
- delays the escape of IR energy
- provides us with oxygen and other useful gases
- provided water vapour for oceans
8. What is an effect of UVB radiation?
- a decrease in cataracts patients
- skin cancer/ DNA damage
- increased photosynthesis
9. Roughly what proportion of the incoming radiation from the sun is absorbed by the Earth's surface?
10. Which is a human source of carbon dioxide?
- aerosol propellents
- combustion of fossil fuels
- forest fires
- respiration
11. 'the % of incoming light reflected from a surface' is a definition of what?
- radiation
- albedo
- dynamic equilibrium
12. How is the troposphere heated?
- from above - IR from sun
- from above - UV light from sun
- from below - IR from Earth
- from below - UV from Earth
13. Which type of UV is almost fully absorbed by ozone?
14. What does the Paris agreement want to limit global temperatures to? - keep 'well below'
- 5 degrees above pre-industrial times
- 2 degrees above pre-industrial times
- 1.5 degrees above pre-industrial times
15. What occurs in ozone depletion?
- UV splits ozone into a stable diatomic molecule and a reactive O atom
- something else
16. A positive feedback mechanism...
- increases the original change
- decreases the original change
17. When were CFC's first developed?
- 1930's
- 1970's
- 1920's
- 1950's
18. What happens to atmospheric pressure with increasing altitude in the troposphere?
- it decreases
- it increases
- it stays the same
19. What happens to temperature with increasing altitude in the stratosphere?
- it increases
- it decreases
- it stays the same
20. Which is a property of CFC's
- able to dissolve grease & oils
- flammable
- boiling points above ambient temperatures
- most are toxic
