Unit 8: Earth's Resources Review (VA SOL)

Coal, petroleum, natural gas, and propane are fossil fuels. They are called fossil fuels because-

• they are nonrenewable and will run out

• they are mixed with fossils to provide energy

• they form from buried remains of plants and animals over millions of years

• they are burned to release energy and they cause air pollution

Nonrenewable energy sources are natural resources that-

• can never be replaced even in millions of years

• can't be replaced after use because it takes millions of years to form

• can be easily replaced

What is NOT a good way to conserve energy in a home?

• Keeping the house a cool in the winter and a little warm in the summer.

• Keeping windows and doors closed

• Turning off lights when they are not needed

• Leaving doors and windows open all the time

Which two energy sources must be swapped on the chart to make it correct?

• natural gas and hydropower

• solar and coal

• biomass and nuclear

The U.S. consumes a lot of energy. Which fuels provide the most energy?

• coal and natural gas

• petroleum (oil) and natural gas

• renewable resources

• nuclear

Tags

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What uses the most energy in U.S. homes each year?

• refrigerators

• lighting

• computers

• heating

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Solar, wind, and water-power energy are all renewable sources of energy. They are called renewable because they-

• do not produce air pollution

• can be converted directly into heat and electricity

• are clean and free to use

• can be replaced by nature in a short period of time

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Today, which renewable energy sources provide the U.S. with the most energy?

• geothermal and solar

• wind and hydroelectric

• solar and wind

Choose ALL the RENEWABLE resources:

• water behind dams

• coal

• wind

• petroleum

How long does it take to replace nonrenewable resources?

• ten years

• millions of years

• one year

• hundreds of years