Test — Test Answers

How is an ecological footprint determined?a.An ecological footprint is determined by measuring the average amount of land and water that a person in a region uses.b.An ecological footprint is determined by measuring carbon dioxide emissions for a given region.c.An ecological footprint is determined by measuring the rate of water use.d.An ecological footprint is determined by measuring the amount of waste generated in a given region.

Renewable resources can be used without worry about consequences to the environment.

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

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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

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Freshwater is used principally as drinking water.

Which describes a way in which phosphorus may enter into the phosphorus cycle?

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How is the world population projected to change in the next few decades?a.It is projected to level off.b.It is projected to decrease steadily.c.It is projected to increase steadily.d.It is projected to double within 5 years.

Decreasing the use of pesticides and herbicides can help agricultural sustainability.

How can failing to conserve water contribute to greater water contamination?a.Overirrigating fields causes an increase in pollution that results from runoff.b.Natural water filters are depleted by the overuse of water.c.Sewage systems are more likely to fail due to greater demand, causing higher chances of water contamination.d.All of the above

Conserving water can save money while protecting the environment.

Why are carbon dioxide concentrations expected to increase?a.Carbon dioxide concentrations are expected to increase, because fossil fuel burning is expected to increase.b.Carbon dioxide concentrations are expected to increase, because of an increase in agriculture.c.Carbon dioxide concentrations are expected to increase, because more land will have to be cleared for increasing populations and agricultural use.d.All of the above

The EPA regulates the dumping of _______ in oceans as outlined by the Ocean Dumping Act.a.industrial wasteb.sewage sludgec.medical wasted.all of the above

What would happen if there were no condensation stage in the water cycle?

Which of the following might occur if people fail to conserve water? a. increased sewage system failures b. increased numbers of natural pollution filters c. increased water supply d. increased wildlife habitats Please select the best answer from the choices provided

The water reclamation process is used to remove solids and impurities, but does not return water to a potable state.

Which of the following is a program rather than a law regulating water quality?a.The Safe Drinking Water Actb.The Clean Water Actc.WaterSensed.The Marine Protection, Research, and Sanctuaries Act

Which of the following statements regarding water conservation is not true?a.Only about 1% of Earth’s water supply is usable for human consumption.b.Over half of the states predict water shortages by 2013.c.While environmentally beneficial, water conservation is a costly endeavor.d.Failure to conserve water will lead to more water contamination.