Chapter 18 - Renewable Energy

Which of the following describes new wind turbines?

• cost-effective

• take up a large amount of space

• take a year to build

• cannot generate much electricity

Renewable energy is energy from sources that

• are constantly being formed.

• will take years to deplete.

• humans can manufacture.

• were once living organisms.

Which of the following is an example of how biomass fuel is currently being used?

• Biogas digesters ferment manure and produce methane.

• Dung-fired power stations produce electricity.

• Ethanol from fermenting corn is added to gasoline.

• All of the above

A geothermal power plant can be used to generate electricity

• anywhere in the U.S.

• in areas where reservoirs of water are heated inside Earth.

• in areas where the ground stays warm throughout the year.

• Both (a) and (c)

A hybrid car uses

• an efficient gasoline engine and an electric motor.

• an efficient gasoline engine and a fuel cell.

• a fuel cell and a solar cell.

• a photovoltaic cell and an electric motor.

Compared to washing clothes in warm water, washing clothes in cold water uses

• much more energy.

• the same amount of energy.

• much less energy.

• a little more energy.

Hydrogen gas could be used as a fuel source in the future because it

• is abundant.

• can be burned as fuel.

• is used in fuel cells.

• All of the above

Ocean Thermal Energy Conversion works because water boils at low temperatures when

• in a high-pressure chamber.

• cooled in a vacuum chamber.

• under low pressure in a vacuum chamber.

• pumped from the ocean.

Which of the following is an example of cogeneration?

• driving a fuel-efficient car

• using the waste heat from a furnace to power a steam turbine

• using ocean thermal energy conversion to run a turbine

• using tidal power to generate electricity

Which of the following is a major source of biomass fuel in developing countries?

• wood

• dung

• corn

• Both wood and dung