Unit 4 - Energy Conservation and Transfer

When a lamp is on, it produces light and which other form of energy?

• heat

• sound

• magnetic

• electrical

Brad and Jill are playing outside in the sun. Which types of energy will they experience from the sun?

• heat and light

• heat and sound

• heat and electrical

• heat and magnetic

Which object converts electrical energy to sound energy?

• a loudspeaker

• solar panel

• a lamp

• plant

Which example best demonstrates heat energy being produced by movement?

• moving across carpet in socks → getting shocked by the door handle

• plugging into an electrical outlet → charging rechargeable batteries

• rubbing hands together → increasing the temperature of the skin

• pedaling a bicycle generator → lighting the bulb in the headlight

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How is light from the sun captured and changed into electrical energy?

• by a bulb

• by a computer

• by a flashlight

• by a solar panel

A toy car is pulled across a desk by a magnet. Which best explains why this happens?

• The toy car has less mass than the magnet.

• The toy car is made of metal and is repelled by the magnet.

• The toy car is made of metal and is attracted to the magnet.

• The toy car has rubber wheels that are attracted to the magnet.

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Which forms of energy are used when a doorbell is pushed, causing a sound?

• light and heat

• sound and heat

• light and electrical

• sound and electrical

What object can Jan use to move a steel paper clip by attraction?

• a flashlight

• a magnet

• a fork

• a nail

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What happens when a drumstick strikes a drum?

• Vibrations create heat.

• Vibrations create light.

• Vibrations create sound.

• Vibrations create electricity.

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Tasha laid a piece of paper on top of a stereo speaker and then poured salt on the paper. What will happen when the music is turned on?

• The sound energy will make the salt move on the paper because of vibrations.

• The sound energy from the music will change into a form of heat energy.

• The sound energy will transform into light energy through the salt.

• The sound energy from the music will make the salt magnetic.

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