Cumulative Exam — Cumulative exam Answers

How is an occluded front different from a cold front?

Why does fossil fuel use in the United States make the U.S. vulnerable to the political wishes of foreign countries?a.The US is a net exporter of fossil fuels.b.Fossil fuels lead to global climate change.c.The US imports much of its petroleum from foreign countries which set the prices.d.All of the above.

Wind, solar and geothermal power are called renewable energy sources because _______.a.tax breaks for these sources are renewed every yearb.they are continuously replenishedc.humans can replenish these sources periodicallyd.they produce few toxic byproducts

The Clean Air Act would be a reason for the Environmental Protection Agency (EPA) to regulate car emissions.

Which of the following statements about mining is true?a.Mining has no long-term effects on the Earth.b.Mining is unimportant to the economy.c.Mining has no ecological impact.d.Mining allows useful minerals to be extracted from the Earth.

Which statement best describes a characteristic of maritime polar air masses?

Which of the following most significantly determines a community's access to potable water? a. access to clean raw water sources b. the availability of money c. local drought conditions d. the level of industrial development Please select the best answer from the choices provided

Which of the following about the ozone layer is not true?a.The ozone layer is formed in the stratosphere.b.The ozone layer helps sustain life by absorbing a large amount of incoming UV radiation.c.Ozone in the troposphere is beneficial to living organisms.d.Depletion of the ozone layer can lead to an increase in skin cancer.

Global climate change is a concern to scientists because it_______.a.is a natural process unaffected by humansb.has never changed beforec.can have drastic effects to life on Earthd.can happen overnight

Which of the following is true about ice ages?a.forests are plentiful and commonb.biodiversity is reducedc.ecosystems are createdd.glaciers recede

Which is most likely a source of air pollution?

The largest supply of Earth’s freshwater is stored in _______.a.lakes and riversb.groundwaterc.the atmosphered.glaciers and icecaps

Which reaction takes place in a nuclear fission reactor?

Which of the following are important products of rainforests?a.timberb.pharmaceuticalsc.oxygend.all of the above

Biological pest control methods supplement but cannot replace chemical pest control methods.

While an important source of freshwater, groundwater is not as widely used as rivers and springs.

How does groundwater become polluted?a.Pollutants mixed with water pass through permeable layers above the aquifer.b.Factories dump their waste directly into aquifers.c.Refuse infiltrates the water table when garbage is dumped.d.All of the above

Why is preventing pollution at its source the first strategy in minimizing environmental risk?a.It is easier and more effective to prevent pollution than to clean up and dispose of waste.b.Remediation of contamination is easier than pollution prevention.c.Habitat restoration cannot be undertaken with modern technologies.d.Safe waste disposal is the easiest was to minimize environmental risk.

The increase in the population of people living in urban areas will cause a decrease in urban sprawl.

Carbon credits are used to _______.a.rehabilitate tropical rainforestsb.reduce the emission of volatile organic compounds (VOC’s)c.regulate how much carbon dioxide a country can emitd.coordinate carbon sequestration activities