Environmental science final review

What is the main reason why fewer nuclear power plants are being built today compared to 40 years ago?

• Federal laws were passed prohibiting the development of new nuclear power plants.
• Nuclear fusion power plants are being built instead.
• Nuclear power plants have become too expensive to generate electricity at a reasonable cost.
• Supplies of U235 are exhausted

Habitat loss, soil erosion, and air pollution are disadvantages of which renewable energy source?

• moving water
• biomass fuel
• wind
• solar

Renewable energy is energy from sources that

• were once living organisms.
• humans manufacture.
• will take years to deplete.
• are constantly being formed.

Hybrids vehicles have engines that use?

• an efficient gasoline engine and an electric motor.
• a fuel cell and solar cells.
• an efficient gasoline engine and a fuel cell.
• a photovoltaic cell and an electric motor

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

• can be burned as fuel.
• is abundant.
• is used in fuel cells.
• all of the choices.

A geothermal power plant gets energy by

• pumping heated water or steam from geothermal reservoirs.
• heating fluid underground 
• creating heat plumes
• circulating fluid underground.

The percentage of energy put into a system that does useful work is

• renewable energy.
• energy conservation.
• energy efficiency.
• energy conversion.

Some hazardous waste is disposed of by deep-well injection.  This procedure

• stores wastes in layers of dry rock below the water table.
• all of the choices are correct
• violates federal law.
• pollutes the wells and water supplies of nearby residents.

DDT is known as a(n) _____ pesticide because it breaks down slowly in the environment.

• persistent
• leachate
• source
• threshold

Exposure to any amount of chemical that is less than the _____ dose has no adverse effect on health.

• External
• Toxic
• Threshold
• Source