AnswersIC Sem B Environmental SystemsChanging Waterways

Changing Waterways — Unit test Answers

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Which of the following is not an effect of erosion on lakes?

A
water leakage
B
wearing away of sides
C
increased water levels
D
basin filling with sediment
2
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The use of buffer strips can help reduce human impacts on waterways.

A
T
B
F
3

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
4

Groundwater overdraft occurs when _______.

A
the location of the water table changes due to season
B
aquifers become polluted
C
the rate of use exceeds the rate of replenishment
D
trees are planted
5

Why might it be beneficial to regulate what species of plants and animals people are allowed to own in particular environments?

A
Some species might become invasive and destructive if they escaped.
B
Some species may be dangerous to humans.
C
Nonnative plants and animals should only be used for commercial purposes.
D
There is no reason to restrict an individuals’ right to own plants or animals.
6

Australian aborigines could not use wells in the desert due to lack of groundwater.

A
T
B
F
7

The defining characteristic of potable water is that it _______.

A
is used as tap water
B
can be used for washing and irrigation
C
can be used and consumed without risk
D
is delivered through pipes
8

Which of the following is true concerning hull fouling from commercial shipping and recreational boating?

A
It constitutes less than half of all nonnative species introductions.
B
The revenue brought in from these industries is relatively small.
C
It is difficult to prevent since ship hulls begin, conduct, and end voyages in water.
D
It is best combated by chemical treatments.
9

Changing your toilet can reduce water pollution because _______.

A
the sewage is partially treated in the toilet before entering the sewer system
B
chemicals added by new toilets neutralize the pathogens in the water
C
more efficient plumbing uses more water and creates larger volumes of waste
D
more efficient plumbing uses less water and creates smaller volumes of waste
10

Which of the following is the most serious effect of water pollution for humans?

A
infectious diseases
B
algal blooms
C
toxic food chain effects
D
low-oxygen water
11

Which of the following is a way in which water resources are consumed?

A
drinking
B
industry
C
business
D
all of the above
12

Which of the following processes requires separate plumbing?

A
water reclamation
B
desalination
C
greywater use
D
none of the above
13

Which of the following statements about the effects of pollution on marine ecosystems is true?

A
Burning fossil fuels causes a direct increase in the temperatures of ocean water.
B
Burning fossil fuels causes a decrease in the pH of ocean water making it more acidic.
C
Pollution in marine ecosystems causes a decrease in the formation of algal blooms.
D
Addition of warm water has no effect on marine ecosystems.
14

Aquifers are _______.

A
located below the water table
B
important sources of freshwater
C
located in the saturated zone
D
all of the above
15

A heat source could be considered a source of pollution..

A
T
B
F

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