AnswersSC332 Environmental Science BAtmospheric Pollution

Ozone Answers

24 verified answers5 views
21
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Ozone is formed when _______.

A
two oxygen molecules combine
B
an individual oxygen atom combines with an oxygen molecule
C
ultraviolet radiation breaks apart four oxygen molecules
D
oxygen molecules are broken into separate atoms
22
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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
23

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
24

How are individual atoms of oxygen formed in the stratosphere?

A
Individual oxygen atoms are formed when oxygen molecules collide with each other.
B
Individual oxygen atoms are formed in the sun.
C
Individual oxygen atoms are formed during photosynthesis.
D
Individual oxygen atoms are formed when UV rays strike oxygen molecules.
25

How is good (stratospheric) ozone formed?

A
combining an oxygen molecule (O2) an atom of chlorine (Cl)
B
combining a single oxygen atom (O) with an oxygen molecule (O2)
C
combining two single oxygen atoms
D
breaking apart an oxygen molecule
26

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
27

Halons contain halogens, which are highly reactive with oxygen.

A
T
B
F
28

When is ozone considered a pollutant?

A
in the stratosphere
B
in the mesosphere
C
in the troposphere
D
in the thermosphere
29

The troposphere contains 90% of the ozone in the atmosphere.

A
T
B
F
30

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
31

What percentage of ozone is contained in the stratosphere?

A
10%
B
50%
C
80%
D
90%
32

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.
33

Where are chlorofluorocarbons found?

A
coolants
B
the atmosphere
C
solvents
D
all of the above
34

Ozone located in the troposphere is _______.

A
considered a pollutant
B
beneficial to living organisms
C
higher in concentration than ozone in the stratosphere
D
all of the above
35

How is good (stratospheric) ozone formed?

A
combining an oxygen molecule (O2) an atom of chlorine (Cl)
B
combining a single oxygen atom (O) with an oxygen molecule (O2)
C
combining two single oxygen atoms
D
breaking apart an oxygen molecule

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