AnswersIC Sem B Environmental SystemsChanging Waterways

Water Policy Answers

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1
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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
2
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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
3

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
4

Which of the following is true concerning sources of water pollution?

A
Mine wastes and heavy metals become water pollution through storm water runoff.
B
Biodegradable materials like food, wood, and leaves are not considered pollution.
C
Petroleum byproducts and fuels end up as pollution principally from oil spills.
D
Pesticides and herbicides do not commonly become water pollutants.
5

How does de-icing roads with salt negatively impact the environment?

A
The road salt attracts deer that are then hit by motor vehicles.
B
It removes necessary salt from the local water courses.
C
The high salinity of the surface runoff is harmful to freshwater ecosystems.
D
The salt harbors salt eating bacteria that are toxic to animals.
6

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
7

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
8

Using a broom to clean sidewalks and driveways is a way to reduce water pollution.

A
T
B
F
9

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

A
T
B
F
10

Introduced sewage in water systems _______.

A
decreases levels of phosphorus and nitrogen
B
increases oxygen levels
C
increases concentrations of solids
D
leads to decreases in the temperature

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