Unit Test — Cumulative exam Answers

Which of the following is not a source of air pollution related to human activities?a.gasolineb.garbagec.forest firesd.radon

Nuclear power is an example of an alternative energy source that has greater negative environmental impacts than the burning of fossil fuels.

The ozone layer is located in the _______.a.troposphereb.stratospherec.mesosphered.thermosphere

Which of the following best explains why humans need constant supplies of fresh water?a.Humans need a constant supply of water to provide them with essential vitamins.b.Humans need a constant supply of water to maintain proper hygiene.c.Constant supplies of freshwater are needed because body water is continually being lost.d.Constant supplies of freshwater are not actually necessary for survival.

How is the heat generated by the reactor core of a nuclear power plant used to provide power to buildings?a.It is used directly to heat homes and offices.b.It generates steam, which turns a turbine, powering a generator.c.It generates steam, which is then condensed back to water. This process produces energy.d.All of the above