Year 8 Energy Revision

Energy is

• The ability to do work

• A force due to gravity

• The rate of doing work

• Another word for speed

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The law of conservation of energy states ...

• Energy can be made and destroyed and changed from one form into another.

• Energy can be made but not destroyed or changed from one form into another.

• Energy cannot be made or destroyed just changed from one form into another.

• Energy cannot be made or destroyed or changed from one form into another.

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How many different types of energy exist?

• 6

• 7

• 8

• 9

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Which of the following are not types of energy?

• Heat

• Light

• Magnetic

• Nuclear

• Kinetic

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Which of the following are commonly wasted energy?

• Heat and kinetic

• Light and heat

• Kinetic and light

• Nuclear and chemical

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What is the name given to a device which changes energy from one form to another?

• Transformer

• Translator

• Transducer

• Transverse

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Which of the following is the unit commonly used to measure energy?

• Metre

• Newton

• Joule

• Kilogram

What are the energy transfers which occur in a Hoover?

• Chemical to kinetic, heat and sound

• Electrical to kinetic , heat and sound

• Nuclear to electrical, heat and light

• Electrical to heat and sound

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When a TV is plugged in and operating electrical energy is changed into light sound and heat. What form is the wasted energy?

• Light

• Sound

• Heat

• All of the above

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Most of our energy on Earth originates from ...

• The Sun

• The Moon

• Gravity

• Mars

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