Unit Test — Unit test Answers

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Which of the following best describes the effects of water pollution on aquatic ecosystems?

A
It can result in fish kills and restrictions on human consumption.
B
It can change the physiology of fish.
C
It can cause long-term alterations of aquatic ecosystems.
D
All of the above
42
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Freshwater is used principally as drinking water.

A
T
B
F
43

It is best to say that efficient plumbing _______.

A
reduces water pollution by using less water
B
reduces water pollution by using cleaner water
C
increases water pollution by using more water
D
reduces water pollution by using dirty water
44

Where is the water table located?

A
10 ft below the surface
B
below the saturated zone
C
at the top of the saturated zone
D
all of the above
45

Which of the following is an effect of fossil fuel emission on oceans?

A
decreased pH
B
decreased carbonate concentrations
C
increased CO2 absorption
D
all of the above
46

The Great Pacific Garbage Patch is best described as _______.

A
a floating island of garbage in the Pacific ocean the size of Texas
B
a garbage patch formed of clusters of plastic debris
C
a patch of densely polluted water the size of Texas in the Pacific ocean
D
the result of oceangoing ship pollution
47

Which of the following is a consequence of water polluted by human sewage?

A
pathogens
B
disease vectors
C
high levels of contaminants
D
all of the above
49

Conserving water can save money while protecting the environment.

A
T
B
F
50

Why is groundwater an important source of freshwater storage?

A
It constitutes approximately 30% of Earth’s freshwater.
B
It is the only viable source of freshwater in some areas.
C
It is available in conditions of drought.
D
All of the above
51

What is a possible long-term consequence of groundwater overdraft?

A
increased vegetation
B
unproductive wells
C
polluted groundwater
D
higher water tables
53

Which of the following best explains the importance of water to humans?

A
Water is essential for sustaining human life.
B
Water is important for shipping and trade.
C
Water is a valuable, profitable commodity.
D
All of the above
56

Point source pollution is much more difficult to track and clean up than nonpoint source pollution.

A
T
B
F
57

Drinking non-potable water does not carry significant health risks.

A
T
B
F
58

The amount of water a body requires for survival is dependent upon the climate and the individual’s level of physical activity.

A
T
B
F
59

Which of the following is least likely to have difficulties with economic access to potable water?

A
Zimbabwe
B
Australia
C
India
D
None of the above
60

The world’s supply of freshwater is increasing.

A
T
B
F

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