Fossil fuel is an energy providing material that comes from

• long-dead remains of living things.

• the center of the Earth.

• out space.

• the atmosphere.

Which of the following is NOT a fossil fuel.

• coal

• carbon dioxide

• petroleum oil

• natural gas

The fuel used in power plants to make electricity is

• natural gas.

• petroleum oil.

• coal.

• water.

Most energy modern people use comes from

• nuclear power.

• using wind energy.

• using the sun's energy.

• burning fossil fuels.

The remains that transformed into fossil fuels were buried for

• a few hundred years.

• millions of years.

• less than 20,000 years.

• hardly any time at all.

Heat and _____________ transformed living things into fossil fuels.

• pressure

• air

• gas

• water

There is a limited amount of fossil fuels.

• true

• false

Fossil fuels are a _______________________.

• renewable resource

• unknown resource

• nonrenewable resource

• new resource

The supply of fossil fuels is NOT rapidly depleting.

• true

• false

Burning fossil fuels causes ____________ and ____________.

• acid rain

• clean air

• air pollution

• clean cities