Water Pollution — Unit test Answers

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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

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.

The toxic effects of water pollution are generally _______.a.immediate and long-lastingb.immediate and short-livedc.delayed and long-lastingd.delayed and short-lived

Which of the following is not a cause of water pollution?a.jet fuelb.laundry soapc.ammoniad.none of the above

The principle difference between point source and nonpoint source water pollution is _______.a.whether the pollution is organic or inorganicb.the number of sources of pollutionc.the amount of pollutiond.whether it is from commercial or agricultural sources

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