Human Uses of Energy

Which two are NOT fossil fuels?

• wood

• natural gas

• uranium

• petroleum

• oil

a substance produced by pressure and decaying organisms that is used for energy

• device

• primary

• fossil fuel

• geothermal

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a solid fossil fuel that is burned to transfer energy

• coal

• petroleum

• natural gas

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Which describes a disadvantage of using natural gas?

• It does not combust very well.

• It is in a liquid state, so it can leak and damage the environment.

• It is harder to transport and store than petroleum and coal.

• It has fewer uses than petroleum and coal.

A liquid fossil fuel that can be burned to transfer energy

• coal

• petroleum

• natural gas

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Sun

• Secondary source of energy.

• The primary source of energy.

• The last source of energy.

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Fossil fuels are _____________ resources.

• renewable

• nonrenewable

An energy source made from unstable elements such as uranium

• coal

• nuclear energy

• hydropower

• oxygen

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The diagram shows a nuclear power plant.

What activity would you expect to happen in the reactor?

• Uranium atoms are split apart to produce heat energy.

• The flow of the water produces kinetic energy to turn the turbines

• Steam causes the uranium rods to heat up.

• Uranium is burned to produce heat energy.

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Most of the energy that people use comes from ____________.

• generators

• batteries

• electrical power

• fossil fuels