A) the process is not yet economically feasible.
B) hydrogen, the principal fuel, is abundant.
C) the fusion process releases an enormous amount of energy.
D) helium, the principal product of fusion, is harmless.
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Multiple Choice
A) extracted from rocks by smelting.
B) metal mixtures combined in their molten state.
C) native metals with impurities.
D) metal products that were first utilized about 9000 years ago.
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Multiple Choice
A) large massive outcrops.
B) buried masses within depressions that resulted from ancient swamp basins.
C) layers, alternating with detrital sedimentary rocks.
D) nodules within sedimentary rock strata.
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Multiple Choice
A) Downwind of the source.
B) At lower elevations compared to the source, wind direction is not a factor.
C) Upwind of the source.
D) Locations close to the source, wind direction is not a factor.
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Multiple Choice
A) Passive solar energy heats areas by natural radiation, conduction, and convection, while active solar energy heats areas by the circulation of solar- heated water.
B) Passive solar energy can be used in areas where there is abundant sunshine, while active solar energy is transported from sunnier regions to regions receiving very little sunshine.
C) Passive solar energy is used to generate heat, while active solar energy is used to generate electricity.
D) Passive solar energy is used for stationary purposes, such as the heating of a building, while active solar energy is used for transportable purposes, such as running an electric car.
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Multiple Choice
A) a worldwide drop in sea level.
B) drought in many regions.
C) melting of the world's ice sheets.
D) desertification in some regions.
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Multiple Choice
A) Japan.
B) Russia.
C) Canada.
D) The United States.
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Multiple Choice
A) hot, hydrothermal solutions circulate through oceanic rocks.
B) plate collisions thrust metal- rich, sea- floor rocks above sea level.
C) metal- rich magmas develop above the subducting plate.
D) hot, metal- rich lavas are erupted along transform faults.
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Multiple Choice
A) Wind must blow constantly.
B) Wind must blow from a constant direction.
C) Wind must blow forcefully.
D) All of the above.
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Multiple Choice
A) the problem of nuclear waste disposal.
B) the potential for theft of weapons- grade plutonium.
C) a shortage of uranium.
D) reactor safety problems.
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Multiple Choice
A) marine shellfish.
B) animals such as dinosaurs.
C) land plants.
D) marine microorganisms.
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Essay
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Multiple Choice
A) An array of mirrors reflects sunlight onto a large water tower, heating the water to produce steam.
B) Water- filled, roof- mounted panels with black linings absorb maximum sunlight.
C) Sunlight passes through window glass and heats objects within a room.
D) Thin wafers of metal- coated silicon absorb sunlight and generate an electric current.
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Multiple Choice
A) secondary enrichment processes.
B) igneous processes.
C) sedimentary processes.
D) hydrothermal processes.
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Multiple Choice
A) hydroelectric energy.
B) biomass.
C) geothermal energy.
D) nuclear energy.
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Multiple Choice
A) The first modern use of petroleum was the use of natural gas in street lights.
B) Petroleum has been used by humans for about 3000 years.
C) The ancient Babylonians used crude oil for making fire arrows for warfare.
D) The first true oil well began pumping in Pennsylvania during the 1850s.
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Multiple Choice
A) renewable resources can be recycled, but nonrenewable resources cannot.
B) renewable resources are replenished over a short time, while nonrenewable resources are finite or are replenished only over long periods of time.
C) renewable resources are primarily mineral resources, while nonrenewable resources are mostly energy resources.
D) at any point in time there is an infinite supply of all renewable resources, but nonrenewable sources must be replenished over time.
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Essay
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Multiple Choice
A) kerogen.
B) natural gas.
C) coal.
D) petroleum.
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Multiple Choice
A) Phosphorus, potassium, and sulfur are all mined for use in agriculture.
B) Pure quartz sand is the prime ingredient in the production of glass.
C) Asbestos, used because it is inflammable, is mined from shallow marine sedimentary deposits.
D) Principal sources of sulfur include the mineral pyrite and the mineral gypsum, while the principal source of potassium is evaporite deposits.
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