Ozone (pretest)

25 July 2022
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10 test answers

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question
When is ozone considered a pollutant? a. in the stratosphere b. in the mesosphere c. in the troposphere d. in the thermosphere
answer
C. in the troposphere
question
How does the absorption of ultraviolet radiation by the ozone layer help sustain life? a. This process helps maintain the temperature of the Earth. b. It keeps a low level of harmful ultraviolet radiation from reaching living organisms. c. This process keeps ozone concentrations in the troposphere at lower levels. d. All of the above are true.
answer
D. All of the above are true.
question
Which of the following is an ozone depleting substance (ODS)? a. ultraviolet radiation b. chlorofluorocarbon (CFC) c. biogeochemical cycle d. none of the above
answer
b. chlorofluorocarbon (CFC)
question
Which of the following is a possible consequence of ozone layer depletion on living organisms? a. increased exposure to ground-level ozone b. decreased levels of ultraviolet radiation in the troposphere c. increased levels of ultraviolet radiation absorption in the stratosphere d. none of the above
answer
A. increase exposure to ground level ozone.
question
Depletion to the ozone layer can cause changes to the biogeochemical cycles.
answer
True
question
The troposphere contains 90% of the ozone in the atmosphere.
answer
False
question
Halons contain halogens, which are highly reactive with oxygen
answer
True
question
How do chlorofluorocarbons (CFCs) contribute to ozone depletion? a. chlorine atom (Cl) breaks apart the ozone molecule b. CFCs build up and block the filtering effects of the ozone layer c. chlorine atom (Cl) bonds to the ozone molecule and changes its chemical properties d. breaks off an oxygen atom (O) and attaches it to a hydroxide ion (OH) to form water
answer
A. chlorine atom (CI) breaks apart the ozone molecule
question
Which of the following is a health risk associated with ground-level ozone? a. cataracts b. skin cancer c. respiratory illness d. all of the above
answer
C. respiratory illness
question
Where are chlorofluorocarbons found? a. coolants b. the atmosphere c. solvents d. all of the above
answer
D. all of the above