Chemistry: Matter and Change

Section 1: The Stories of Two Chemicals

Self Check Quizzes

1
What would you expect to result from a decrease in the amount of ozone in the stratosphere?

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A)decrease in the amount of oxygen in the troposphere
B)decrease in the number of individual oxygen particles
C)increase in the amount of oxygen in the troposphere
D)increase in the number of individual oxygen particles
2
Ozone is found in the ___.
A)troposphere
B)stratosphere
C)mesosphere
D)ionosphere
3
A chlorofluorocarbon is a chemical that is made of ___.
A)chloron, fluoron, and carbon
B)carbon and oxygen
C)chlorine, fluorine, and carbon
D)carbon and hydrogen
4
Look at the graph. During what year did the increase in CFC-11 concentration begin to level out?

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A)1989
B)1991
C)1990
D)1984
5
Why were chlorofluorocarbons first developed?
A)to destroy the ozone layer
B)for use in plastic foam
C)for use as spray can propellants
D)to replace toxic gases in refrigerators
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