Milestones and Turning Points — Cumulative exam Answers

Which of the following best explains why air pollution that was once blamed for global cooling is now considered responsible for global warming?a.Pollution began reflecting sunlight and heat rather than absorbing it.b.Evidence of global warming became overwhelming.c.Scientists mistakenly thought pollution reflected sunlight and heat rather than absorbed it.d.Congress required scientists to assign a cause to global climate change.

Why do many fishermen support efforts to protect and restore mangrove forests?a.Most fishermen are environmentalists.b.Many fish breed in mangrove forests.c.They lay their nets in mangrove forests.d.Mangrove forests provide valuable hardwoods.

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

The scientific community disagrees about _______.a.the rate of global climate changeb.the occurrence of global warmingc.the need for actiond.all of the above

Genetic factors are more important than environmental factors in determining an individual’s personal health risks.

Bottom trawling is considered destructive because _______.a.it destroys sea floor habitatsb.it depletes fish populationsc.it shatters deep-sea corald.all of the above

What is an advantage to alternative energy technology?a.Using alternative energy technology increases the demand for fossil fuels.b.Most alternative energy technologies use nonrenewable resources.c.Alternative energy technology can reduce the environmental impact of burning fossil fuels.d.There is no advantage to using an alternative energy technology.

The following is a chemical reaction for _______ with ozone. a. chlorofluorocarbons b. halons c. UV radiation d. none of the above Please select the best answer from the choices provided

Which of the following statements about urban growth is true?a.The rate of urban growth in the world is decreasing.b.Urban sprawl is less environmentally damaging than upward growth.c.Upward growth is less environmentally damaging than urban sprawl.d.More people are moving away from cities than in previous years.

The ozone layer helps sustain life by absorbing a large amount of incoming UV radiation.

Exposure to pesticides or industrial chemicals _______.a.always has immediate and apparent side effectsb.decreases the risk of developing genetically influenced diseasesc.increases the risk of developing genetically influenced diseasesd.has no effect on the risk of contracting genetically influenced diseases

Soil generation and soil conservation are equally effective agricultural strategies.

Which of the following will not contribute to resource conservation?a.using solar powerb.recycling glassc.using nuclear powerd.using biofuels

When is the carbon stored in plants released?a.during cellular respirationb.during photosynthesisc.when they died.none of the above

Global climate change will have no impact to life on the Earth.

Which of the following is a negative consequence of scientific advancements on society?a.increased life expectancyb.increased pollutionc.new energy resourcesd.all of the above

Which of the following best explains the importance of studying the ocean carbon cycle?a.The oceans have a significant impact on the levels of atmospheric gases.b.It is a new field of ocean science.c.The ocean releases one quarter of the carbon dioxide in the atmosphere.d.All of the above