Water Pollution Answers

Which of the following best describes pollution discharged by cruise ships?a.Cruise ships only discharge sewage and liquid wastes.b.Cruise ships discharge sewage, solid, liquid, and air pollution.c.It is illegal for cruise ships to discharge untreated sewage in the ocean.d.Cruise ships do not discharge oil or petroleum waste.

Nonpoint source pollution is difficult to control because it _______.a.comes from a direct point of originb.comes from a variety of sourcesc.remains the same over timed.none of the above

Surface runoff is an example of nonpoint source pollution.

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

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.

Which of the following is true about impervious building materials?a.Impervious surfaces prevent pollutants from entering the water supply.b.Vegetation and gravel are common impervious materials.c.Having fewer impervious surfaces improves water drainage.d.All of the above

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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

Changing your toilet can reduce water pollution because _______.a.the sewage is partially treated in the toilet before entering the sewer systemb.chemicals added by new toilets neutralize the pathogens in the waterc.more efficient plumbing uses more water and creates larger volumes of wasted.more efficient plumbing uses less water and creates smaller volumes of waste

Introduced sewage in water systems _______.a.decreases levels of phosphorus and nitrogenb.increases oxygen levelsc.increases concentrations of solidsd.leads to decreases in the temperature