test2 - Ozone 1. How many miles above the earths surface is...

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Ozone 1. How many miles above the earth’s surface is the ozone layer? 12 to 25 miles 2. Which atom destroys the ozone most? Chlorine 3. Which atom destroys the least ozone? Hydrogen 4. The ozone layer was formed about 1billion years ago 5. CFCs were developed in the early 1930’s 6. What does Y represents in the chemical reaction below? o3+y -> o2+o UVB 7. Which of the following atoms that is not a halogen? hydrogen 8. CFCs (chloro-fluoro-carbons) were used in foams 9. Which of the following is not a green-house gas? Oxygen 10. A hole (50% reduction) in the Antarctic ozone layer was first observed in the 1980’s 11. CFCs were used in propellants foams refrigeration all of the above 12. Which of the following ultraviolet light that mostly destroys the ozone UVB 13. Which of these greenhouse gases has the highest percentage composition in the atmosphere? Water vapor 14. 60% of the CFC-12 will disappear from the atmosphere in about 116years 15. 60% of the CFC-11 will disappear from the atmosphere in about 55years Ozone and Global Warming 1. Which type if uv radiation is needed to produce vitamin D? uvA 2. The wavelength of uvA radiation is 320-380nm (visible light is 400-700nm)
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3. Which type of uv radiation is responsible for the most DNA damage at the earth’s surface? uvB 4. The wavelength of uvC radiation is 250-290nm 5. Which uv radiation is mostly filtered by the atmosphere? uvC 6. Which has the lowest wavelength on the electro-magnetic spectrum? Gamma rays 7. Which on the spectrum has the highest wavelength? AM radio (gamma rays has the highest energy) 8. Which has the highest frequency on the electromagnetic spectrum? Violet 9. The ____ is the unit of frequency. hertz 10. The________ is the unit of wavelength. Meter 11. How many nanometers are in a micron? One thousand in a meter? One billion in a millimeter? One million 12. Visible light has the wavelengths in the range 400-680nm 13. Increased radiation in the range 290-290nm may destroy corneal cells, scar the conjunctivia, cause cataracts, all above 14. Which is not a layer in the earth’s atmosphere? Biosphere 15. Which the farthest layer from the earth’s surface? exosphere 16. Which is the most turbulent region in the earth’s atmosphere? Troposphere
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test2 - Ozone 1. How many miles above the earths surface is...

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