Core Unit 3 Review: Energy

Businesses can generate their own electricity by capturing and converting energy.

Which is the source of energy for the panels shown?

• Water

• Wind

• The sun

• The moon

The oil used today is made from the ancient remains of tiny sea creatures called "diatoms". When they were alive, the diatoms converted sunlight into stored energy. Based on this information, which of the following statements is true?

• The sun turned diatoms into oil after 10-20 years.

• Diatoms are the original source of energy for oil.

• The sun is the original source of energy for oil.

• Diatoms converted oil into energy.

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Moving water can be used to produce electricity because

• most forms of energy can be converted into other forms.

• energy cannot be converted into other forms of energy.

• potential energy can be converted into kinetic energy, but not vice versa.

• kinetic energy can be converted into potential energy, but not vice versa.

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Which of these statements about nonrenewable resources is true?

• They are inexpensive.

• They help keep the air clean.

• They may take millions of years to form.

• They are used because they are easily removed from the ground.

Unlike coal, wind energy is renewable. Wind farms are being used to turn the power of the wind into electricity.

What is an advantage of using wind instead of coal to produce electricity?

• Wind produces more electricity.

• Wind is available in unlimited supply.

• Wind farms produce more waste than coal.

• Wind farms cost less to run than coal power plants.

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Dams are built on rivers to hold back water.

The water is then released and passes through turbines to produce

• solar energy.

• thermal energy.

• chemical energy.

• electrical energy.

Coal-powered plants are designed specifically to convert

• electrical energy to heat energy.

• chemical energy to electrical energy.

• electrical energy to radiant energy.

• kinetic energy to potential energy.

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What human actions helps maintain a renewable resource?

• building power plants that use coal as fuel

• clearing land for roads and buildings

• directing fertilizer runoff to ponds

• replanting trees in deforested areas

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Which of these is the most likely reason scientists are trying to find ways to get energy from more renewable resources?

• Renewable resources cost less to produce energy than nonrenewable resources.

• Renewable resources are easier to replace than nonrenewable resources.

• Renewable resources create more power than nonrenewable resources.

• Renewable resources are less dangerous than nonrenewable resources.

Wind is becoming more common as a source of energy. Wind farms require large open spaces for the wind turbines. A negative consequence of this technology is wind turbines

• are an inexpensive source of energy.

• cause little pollution to the environment.

• may hurt the flying animals in the area.

• are a renewable source of energy.

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