AnswersTX-Environmental Systems-BCASUnit Test

Unit Test — Unit test Answers

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21
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Lakes and rivers constitute _______.

A
87% of freshwater
B
a tiny fraction of Earth’s freshwater
C
a majority of Earth’s freshwater
D
a majority of water on earth
22
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To be considered a source of water pollution, the source must include a chemical. Please select the best answer from the choices provided

A
T
B
F
23

Desalination has no known negative impacts on the environment.

A
T
B
F
24

The location of the water table is subject to change.

A
T
B
F
25

The Working for Water program helps conserve water by employing individuals to remove invasive plants.

A
T
B
F
26

The Karez well system _______.

A
was the first known use of wells
B
was a postindustrial system
C
transported groundwater from a distance
D
all of the above
27

Which of the following regulations is the primary law regarding water pollution?

A
The Safe Drinking Water Act
B
The Clean Water Act
C
The Marine Protection, Research, and Sanctuaries Act
D
WaterSense
28

Potable water delivery systems are characterized by _______.

A
high infrastructure costs
B
aqueducts
C
glass bottles
D
rivers
29

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
30

What is the greatest use of groundwater?

A
drinking
B
industry
C
agriculture
D
recreation
31

Which of the following is not an option for solving the world water crisis?

A
desalination
B
finding new sources of freshwater
C
reducing overconsumption
D
wastewater treatment plants
32

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
33

Which of the following statements about desalination is true?

A
Desalination is less expensive than water reclamation.
B
Desalination uses large amounts of energy.
C
Desalination is the main process used to provide water for crop irrigation.
D
All of the above
34

Access to potable water is most heavily limited by _______.

A
money
B
precipitation
C
raw water supplies
D
climate
35

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
36

Freshwater is used principally as drinking water.

A
T
B
F
37

Which of the following sources of pollution would be the most difficult to track and regulate?

A
lawn fertilizer runoff
B
a waste treatment plant
C
a factory
D
a nuclear power plant
38

The principle difference between point source and nonpoint source water pollution is _______.

A
whether the pollution is organic or inorganic
B
the number of sources of pollution
C
the amount of pollution
D
whether it is from commercial or agricultural sources
39

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

A
increased vegetation
B
unproductive wells
C
polluted groundwater
D
higher water tables
40

The toxic effects of water pollution are generally _______.

A
immediate and long-lasting
B
immediate and short-lived
C
delayed and long-lasting
D
delayed and short-lived

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