Cumulative Midterm Exam Answers

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41
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The following is a chemical reaction for _______ with ozone.

Question illustration
A
chlorofluorocarbons
B
halons
C
UV radiation
D
none of the above
42
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How is the heat generated by the reactor core of a nuclear power plant used to provide power to buildings?

A
It is used directly to heat homes and offices.
B
It generates steam, which turns a turbine, powering a generator.
C
It generates steam, which is then condensed back to water. This process produces energy.
D
All of the above
43

Which of the following is not a reason for cluster distribution of organisms?

A
localized availability of resources
B
herd behavior
C
hive behavior
D
territorial behavior
44

Which of the following is not a reason for cluster distribution of organisms?

A
localized availability of resources
B
herd behavior
C
hive behavior
D
territorial behavior
48

Which of the following best explains why air pollution that was once blamed for global cooling is now considered responsible for global warming?

A
Pollution began reflecting sunlight and heat rather than absorbing it.
B
Evidence of global warming became overwhelming.
C
Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.
D
Congress required scientists to assign a cause to global climate change.
49

Nuclear power is an example of an alternative energy source that has greater negative environmental impacts than the burning of fossil fuels.

A
T
B
F
50

Alternative energy sources are always dependent upon favorable weather conditions.

A
T
B
F
52

The scientific community disagrees about _______.

A
the rate of global climate change
B
the occurrence of global warming
C
the need for action
D
all of the above
53

The ozone layer helps sustain life by absorbing a large amount of incoming UV radiation.

A
T
B
F
54

The greenhouse effect _______.

A
is essential for life on Earth
B
warms Earth’s atmosphere
C
is a natural phenomenon
D
all of the above
55

Which of the following is not a source of air pollution related to human activities?

A
gasoline
B
garbage
C
forest fires
D
radon
56

Which issue poses the greatest long-term challenge in the development of new nuclear power plants?

A
controlling carbon dioxide emissions
B
storage of radioactive waste
C
controlling fission reactions
D
mining of uranium
57

What is a possible long-term effect of continued exposure to air pollution?

Answer not available
58

Direct observation is the simplest and most effective method to determine population size.

A
T
B
F
59

How does a decrease in biodiversity impact an ecosystem?

Answer not available
60

Human health is unaffected by environmental limiting factors.

A
T
B
F

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