A) supernatural explanations should be included in our explanations.
B) if theories are repeatedly tested,they can become hypotheses.
C) the universe functions according to certain basic principles and laws.
D) every scientific investigation requires the inclusion of proper control groups.
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A) good observations.
B) good experiments.
C) multiple hypotheses,some of which are unanswerable.
D) an already accepted theory.
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A) the American Medical Association.
B) the EPA.
C) industries producing DDT.
D) public opinion.
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A) the sun beating down on a rain forest
B) plants,such as bamboo and rice,growing in moist environments
C) oil reserves,buried deep below the surface of the ground
D) water flowing through a dam
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A) lobbying government officials to increase the drilling for offshore oil
B) selecting a source of energy based upon the maximum yield of tax dollars
C) converting automobiles from gasoline to natural gas as a new source of fuel
D) promoting the recycling of paper and aluminum on university campuses
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A) Investigations of the cause of AIDS are limited by our inability to see viruses.
B) Investigations of the health effects of smoking are funded and published by a tobacco company.
C) Researchers studying heron nests notice that some baby herons fall out of nests and are killed.
D) An experiment testing the effect of a new drug has only one control group.
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A) transmitting visible light and absorbing infrared radiation.
B) transmitting infrared radiation and absorbing visible light.
C) transmitting infrared radiation and visible light.
D) absorbing infrared radiation and visible light.
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A) natural gas used to heat homes
B) gasoline used to run cars
C) hydroelectric dams
D) a coal-fired electrical power plant
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A) East fields are more likely than west fields to have problems with grasshoppers eating corn crops.
B) If a cornfield is sprayed with pesticide Z,it will have fewer grasshoppers 10 weeks later.
C) Pesticide Z is unable to kill grasshoppers and is not suitable for the use in modern agriculture.
D) Pesticide Z is a good way to control most insect infestations on fields of corn,wheat,or oats.
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A) the dangers of the introduction of exotic species into remote locations.
B) the importance of understanding the local ethics of a community.
C) the role of sound science in addressing environmental issues.
D) the dangers of sustainable environmental practices resulting from globalization.
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A) sustainability and stewardship.
B) junk science and the influence of politics in government.
C) global communication and equity in trade with other cultures.
D) the need to establish more state and national parks.
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A) Carbon dioxide accumulates in the atmosphere while many factors affect global temperatures.
B) Carbon dioxide steadily escapes from the atmosphere into space while global temperatures accumulate irregularly.
C) Carbon dioxide levels are produced at an even rate while clouds may cool the Earth unevenly.
D) Carbon dioxide levels increase temperature until the heat destroys some of the carbon dioxide,lowering temperatures irregularly.
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A) the exchange of information
B) agricultural practices
C) public-health practices
D) local cultures' religious and dietary traditions
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A) John Muir's conservation activities.
B) Rachel Carson's Silent Spring.
C) the greenbelt movement.
D) the Dust Bowl.
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A) M.
B) U.
C) S.
D) J.
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A) primarily addressed growing pollution of the environment.
B) has remained focused on issues related to renewable energy.
C) directly led to the green revolution.
D) has focused on efforts to control infectious diseases throughout the world.
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A) Europe.
B) North America.
C) developing countries.
D) developed countries.
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A) pathogenic bacteria.
B) minute predators accidentally imported in sea water.
C) temperatures too warm for larval survival.
D) increase in the acidity of sea water in which the larvae were incubated.
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A) constructing coal mines that do not require extensive surface excavations
B) increasing our reliance upon renewable sources of energy
C) upgrading or replacing computers every few years to improve performance
D) converting automobiles from gasoline to natural gas as a new source of fuel
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A) at least 30 developing countries will move into the developed category.
B) more than 400 million people will be lifted out of extreme poverty.
C) the population of the world will stop increasing.
D) people in the developing world will all have basic medical coverage.
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