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Question: 1 the chemical form of ozone is a o b...

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1) The chemical form of ozone is

a) O.

b) O2.

c) O3.

d) O4.

e) OO.

2) Which of the following demonstrates the naturally occurring formation of ozone?

a) An O2 molecule absorbs UV energy, which causes it to split into two O atoms.

b) A single O atom combines with an O2 molecule to form O3.

c) An O3 molecule absorbs UV radiation and splits into O2 + O.

d) A Cl atom reacts with an O3 molecule creating ClO and O2.

e) A ClO molecule gives up its O to another single O from an O3.

3) Which of the following causes the naturally occurring destruction of ozone?

a) An O2 molecule absorbs UV energy, which causes it to split into two O atoms.

b) A single O atom combines with an O2 molecule to form O3.

c) An O3 molecule absorbs UV radiation and splits into O2 + O.

d) A Cl atom reacts with an O3 molecule, creating ClO and O2.

e) A ClO molecule gives up its O to another single O from an O3.

4) Which of the following causes the unnatural, or human-made, destruction of ozone?

a) An O2 molecule absorbs UV energy, which causes it to split into two O atoms.

b) A single O atom combines with an O2 molecule to form O3.

c) An O3 molecule absorbs UV radiation and splits into O2 + O.

d) A Cl atom reacts with an O3 molecule creating ClO and O2.

e) A ClO molecule gives up its O to another single O from an O3.

5) Ozone primarily occurs

a) in the stratosphere.

b) in a layer between 9 and 19 miles up.

c) at ground level as a form of pollution.

d) all of these.

6) Where are the greatest concentrations of ozone found?

a) in the troposphere.

b) in a layer between 9 and 19 miles up.

c) at ground level as a form of pollution.

d) all of these.

e) none of these.

7) Select all of the following statements that are true about ozone depletion.

a) CFC molecules are very stable in the atmosphere and gradually diffuse upward to the ozone layer.

b) CFC molecules in the ozone layer absorb UV radiation and break apart with one molecule being ClO (chlorine oxide).

c) ClO molecules then release their O to a passing O in the ozone layer.

d) The lone Cl atom then attaches to an O3 molecule, breaking it into O2 and ClO

e) The ClO molecule then falls to Earth and removes some oxygen from the ozone layer.

8) Which of the following statements is false?

a) The Antarctic ozone hole forms every spring in the Southern Hemisphere because a polar vortex develops during the previous winter that traps air within it.

b) During the existence of the polar vortex, the air becomes very cold and thin clouds of ice crystals form.

c) The thin clouds of ice crystals help facilitate the destruction of ozone by UV radiation.

d) The peak loss of ozone occurs in September-October.

e) They are all true.

9) Select all of the following statements that are true?

a) The peak loss of ozone in the Antarctic ozone hole occurs in September-October.

b) UV radiation reaching the ground at 55º S latitude has increased about 10% per decade since the late 1970s.

c) A similar but weaker ozone hole develops over the Arctic region in the Northern Hemisphere each winter.

d) UV radiation reaching the ground at 55º N latitude has increased about 7% per decade since the late 1970s.

10) The stratospheric concentration of CFCs over Antarctica

a) continues to worsen every year, with a corresponding increase in the northern ozone hole.

b) continues to worsen each year, but the destruction is lessening over time, and should start to reverse itself in the next decade.

c) stays about the same size every year. There may or may not be an actual problem.

d) is typically smaller each year due to an international agreement to reduce the use of CFCs..

e) is no longer a problem.

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