MEC280 - Test-2 Study Questions

MEC280 - Test-2 Study Questions - MEC-280 Midterm 2 1. How...

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MEC-280 Midterm 2 1. How many miles above the earth’s surface is the ozone layer? a. 12 to 25 miles b. 18 to 30 miles c. 25 to 40 miles d. 30 to 50 miles 2. Which atom destroys the ozone the most? a. Carbon b. Chlorine c. Copper d. Calcium 3. Which atom destroys the least ozone? a. Bromine b. Chlorine c. Nitric oxide d. Hydrogen 4. The ozone layer was formed about a. 10 billion years ago b. 1 billion years ago c. 100 million years ago d. 10 million years ago 5. CFCs were developed in the early_____ a. 1920s b. 1930s
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c. 1940s d. 2000s 6. What does Y represent in the chemical reaction below? + + O3 Y O2 O a. UVA b. UVB c. UVC d. None of the above 7. Which of the following atoms is not a halogen? a. Fluorine b. Chlorine c. Iodine d. Hydrogen 8. CFCs (chloro-fluro-carbons) were used in a. Plastics b. Foams c. Anti-oxidants d. All of the preceding 9. Which of the following is not a greenhouse gas? a. Carbon dioxide b. Methane c. Ozone d. Oxygen 10. A hole (50% reduction) in the Antarctic ozone layer was first observed in the
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a. 1960s b. 1970s c. 1980s d. 1990s 11. CFCs (chloro-fluro-carbons) were used in a. Propellants b. Foams c. Refrigerants d. All of the above 12. Which of these greenhouse gases has the highest percentage composition in the atmosphere? a. Water vapor b. Carbon dioxide c. Methane d. Ozone 13. 60% of the CFC-12 will disappear from the atmosphere in about a. 55 years b. 116 years c. 173 years d. 210 years 14. 60% of the CFC-11 will disappear form the atmosphere in about a. 55 years b. 116 years c. 173 years d. 210 years
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15. Which type of UV radiation is needed to produce vitamin D? a. uvA b. uvB c. uvC 16. The wavelength of uvA radiation is a. 50 – 250 nm b. 320 – 380 nm c. 400 – 700 nm d. 800 – 1000 nm 17. Which type of uv radiation is responsible for the most DNA damage at the earth’s service?
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This note was uploaded on 04/30/2009 for the course MEC 280 taught by Professor Sessay during the Spring '08 term at SUNY Stony Brook.

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MEC280 - Test-2 Study Questions - MEC-280 Midterm 2 1. How...

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