Renewable Energy Review

1. The use of which renewable energy source is growing at the most rapid rate?

• the sun

• wind

• Earth's heat

• living organisms

Much of Iceland’s power comes from geothermal energy. What geologic features are likely to be present in large numbers in Iceland?

• glaciers

• waterfalls

• geysers

• rivers

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A characteristic of ground source heat pumps is that

• they use heated underground rocks.

• underground soil temperature remains constant year-round.

• they do not use water.

• heat does not have to be transferred

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One disadvantage of hydropower is that it

• is nonrenewable

• is expensive.

• harms ecosystems

• releases greenhouse gases

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What is used to absorb heat in a flat-plate solar collector?

• a photovoltaic cell

• glass panes

• a heat pump

• a metal plate

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Which of the following is a benefit of wind power?

• It does not cause pollution

• It is predictable

• Startup costs are low

• It does not harm wildlife

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At the present time, the most common and least expensive way to produce hydrogen fuel is by

• the electrolysis of water

• the breakdown of methane

• nuclear fission

• reaction of algae

What are the products of the breakdown of methane?

• hydrogen and carbon dioxide gases

• hydrogen and oxygen gases

• hydrogen gas and water

• oxygen gas and water

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Stoves that burn corncobs are using

a.

geothermal energy.

• geothermal

• hydropower

• solar energy

• biomass energy

Electricity generated from burning switchgrass is called

• biofuel

• wind

• ethanol energy

• biomass energy