Changing Waterways — Unit test Answers

Which of the following is not an effect of erosion on lakes?a.water leakageb.wearing away of sidesc.increased water levelsd.basin filling with sediment

The use of buffer strips can help reduce human impacts on waterways.

Which of the following is least likely to have difficulties with economic access to potable water?a.Zimbabweb.Australiac.Indiad.None of the above

Groundwater overdraft occurs when _______.a.the location of the water table changes due to seasonb.aquifers become pollutedc.the rate of use exceeds the rate of replenishmentd.trees are planted

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.

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

The defining characteristic of potable water is that it _______.a.is used as tap waterb.can be used for washing and irrigationc.can be used and consumed without riskd.is delivered through pipes

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.

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

Which of the following is the most serious effect of water pollution for humans?a.infectious diseasesb.algal bloomsc.toxic food chain effectsd.low-oxygen water

Which of the following is a way in which water resources are consumed?a.drinkingb.industryc.businessd.all of the above

Which of the following processes requires separate plumbing?a.water reclamationb.desalinationc.greywater used.none of the above

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. Please select the best answer from the choices provided

Aquifers are _______.a.located below the water tableb.important sources of freshwaterc.located in the saturated zoned.all of the above

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