Chapter 2 Science

Which of these in an example of potential energy changing to kinetic energy?

• A roller coaster car pauses at the top of a hill and then rolls down.

• A driver stops her car at a stoplight.

• One horse runs faster than another horse.

• A skier rides a chairlift to the top of a mountain.

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NGSS.MS-PS3-2

In the afternoon when the sun is in the western sky, a tree's shadow stretched to the

• west

• east

• north

• south

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Most objects that give off light also give off

• heat

• sound

• electricity

• mechanical energy

Something that makes a loud sound vibrates

• at a high frequency.

• at a low frequency.

• with a lot of energy

• with a little energy

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NGSS.MS-PS4-1

A student wires together three light bulbs and a battery. One of the bulbs burns out. Predict what will happen next.

• The battery will break

• None of the light bulbs will stay lit

• one bulb will stay lit

• the other bulbs will burn brighter

You buy a white shirt. Which of these is true about the shirt?

• The shirt refracts any light that hits it

• The shirt reflects white light only

• The shirt reflects all colors of light

• The shirt absorbs all colors of light

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NGSS.MS-PS4-2

A violin has a higher pitch than a cello. What could be a reason for this?

• The cello has longer, thicker strings

• The violin has longer, thicker strings

• The strings on a violin vibrate more slowly

• Cells are played at a higher volume than violins.

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NGSS.MS-PS4-1

Why is plastic a good material for the covering of a wire?

• Plastic attracts an electric charge

• Plastic carries an electric current

• Plastic is a conductor

• Plastic is an insulator

A girls with a sled climbs to the top of a snowy hill. At the top of the hill, she sits on the sled, leans forward, and then slides down the hill. How does energy change as the girl climbs the hill and then sleds down?

• kinetic energy

• changes to

• when the girl slides down.

• Potential energy

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NGSS.MS-PS3-2

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NGSS.MS-PS3-5

A battery-operated flashlight is not glowing. Suggest two reasons why this might be the case.

• Flashlights might need a new battery

• Flashlights switch might be open

• Flashlight is mad

• Flashlight doesn't like the dark

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NGSS.MS-ETS1-1