2. Unit One: Air

3. $100 $200 $400 $300 $400 AtmosphereAir PollutantsOzoneClimate Change $300 $200 $400 $200 $100 $500 $100

4. The layer of the atmosphere closest to the Earth. What is the Troposphere?

5. A yellow pollutant, found as an impurity in coal, that forms a gas when burned that reacts with water to form acid rain. What is sulfur?

6. These chemicals were the first to be banned for destroying the stratospheric ozone. What are chlorofluorocarbons?

7. These gases absorb infrared radiation and trap heat on the Earth. What are greenhouse gases ?

8. The unreactive gas that makes up about 79% by volume of the gases in the atmosphere. What is nitrogen ?

9. A vital substance in our stratosphere that protects us from uv radiation but is a dangerous pollutant at ground level. What is ozone?

10. This treaty, signed by all UN countries in 1987, is an agreement to ban the use of certain ozone damaging gases. What is the Montreal Protocol ?

11. The concentration of this gas in our atmosphere has been increasing more rapidly since the industrial age and is now measured at about 390 ppmv. What is carbon dioxide?

12. The tilt of the Earth on its axis. What causes summer and winter (the seasons)?

13. A reddish brown gas that causes smog and acid rain. What is nitrogen dioxide?

14. Although we’ve stopped producing CFCs this will take another 50-60 years. How long will it take for the ozone layer to repair ?

15. An effect of increased dissolved CO 2 that damages coral reefs. What is ocean acidification?

16. The method of heat transfer where matter absorbs pure energy carried by photons. What is heat transfer by radiation?

17. This legislation resulted in significant decreases in all major air pollutants monitored by the EPA. What is The Clean Air Act?

18. These effects would be expected in a world where the ozone layer is severely depleted. What are increased skin cancer and eye cataracts?

19. Carbon dioxide, methane, water, sulfur hexafluoride What are some important greenhouse gases?

20. The reflectivity of a surface. What is albedo?

21. This kind of air pollution is caused by emissions of nitrogen oxides that react with ultraviolet radiation to form secondary pollutants. What is photochemical smog?

22. These banned substances were once used in refrigerators and air conditioners. What are chlorofluorocarbons?

23. The leading international body for the assessment of climate change. What is the IPCC ?