Where is the water table located?a.10 ft below the surfaceb.below the saturated zonec.at the top of the saturated zoned.all of the above
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
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Which of the following is not an option for solving the world water crisis?a.desalinationb.finding new sources of freshwaterc.reducing overconsumptiond.wastewater treatment plants
Potable water delivery systems are characterized by _______.a.high infrastructure costsb.aqueductsc.glass bottlesd.rivers
Which of the following statements about desalination is true?a.Desalination is less expensive than water reclamation.b.Desalination uses large amounts of energy.c.Desalination is the main process used to provide water for crop irrigation.d.All of the above
Which of the following is true of salt lakes?a.The water flowing in to salt lakes comes directly from the ocean.b.Salt lakes are formed when river bends are cut off.c.The water flowing in to salt lakes contains minerals.d.Salt lakes do not experience shrinking due to erosion.
Human activity on land can have a profound influence on marine ecosystems.
Which of the following is not a way that nonnative organisms are introduced to new aquatic ecosystems related to commerce?a.cargo ship hullsb.recreational boatsc.escape from aquariumsd.migration
Which of the following regulations is the primary law regarding water pollution?a.The Safe Drinking Water Actb.The Clean Water Actc.The Marine Protection, Research, and Sanctuaries Actd.WaterSense
Which of the following is not an example of mechanical control of nonnative species?a.pullingb.inspectionsc.net barriersd.mowing
Which of the following sources of pollution would be the most difficult to track and regulate?a.lawn fertilizer runoffb.a waste treatment plantc.a factoryd.a nuclear power plant
It is best to say that efficient plumbing _______.a.reduces water pollution by using less waterb.reduces water pollution by using cleaner waterc.increases water pollution by using more waterd.reduces water pollution by using dirty water
Invasive species often unbalance the ecosystems into which they are introduced because _______.a.they did not co-evolve with the natural species and lack natural controls, like predatorsb.they breed quickly and have the potential to overpopulate an areac.they consume local resourcesd.none of the above
Which of the following practices could help reduce erosion of water banks?a.buffer stripsb.natural fertilizers and pesticidesc.decrease in fossil fuel emissionsd.all of the above
Access to potable water is most heavily limited by _______.a.moneyb.precipitationc.raw water suppliesd.climate
The Karez well system _______.a.was the first known use of wellsb.was a postindustrial systemc.transported groundwater from a distanced.all of the above
Freshwater is used principally as drinking water.
Why are cane toads in Australia considered an invasive species rather than simply nonnative?a.They are destructive to native species and have no natural predators.b.They reproduce more quickly than native species.c.They have venom glands.d.Large adult specimens are able to hunt snakes.
How does the loss of vegetation on shore lines affect waterways?a.decreased sedimentationb.increased shorelinesc.increased erosion of water banksd.none of the above
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