Water Pollution Answers

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

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

whether the pollution is organic or inorganic

the number of sources of pollution

the amount of pollution

whether it is from commercial or agricultural sources

Introduced sewage in water systems _______.

decreases levels of phosphorus and nitrogen

increases oxygen levels

increases concentrations of solids

leads to decreases in the temperature

Surface runoff is an example of nonpoint source pollution.

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

The road salt attracts deer that are then hit by motor vehicles.

It removes necessary salt from the local water courses.

The high salinity of the surface runoff is harmful to freshwater ecosystems.

The salt harbors salt eating bacteria that are toxic to animals.

Nonpoint source pollution is difficult to control because it _______.

comes from a direct point of origin

comes from a variety of sources

remains the same over time

none of the above

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

It can result in fish kills and restrictions on human consumption.

It can change the physiology of fish.

It can cause long-term alterations of aquatic ecosystems.

All of the above

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