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Ryan rubs two sticks together quickly. When he stops rubbing the sticks, he notices that they are warm to touch where he rubbed them. Which type of energy has been produced?

• sound energy

• heat energy

• light energy

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NGSS.MS-PS3-5

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The ultimate source of energy is:

• The sky

• The sun

• Plants

• Movement

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Betsy depends on her electric alarm clock every morning to get up in time for school. What energy transformation happens in Betsy's alarm clock to wake her up in the morning?

• electrical energy is converted to thermal energy

• electrical energy is converted to sound energy

• chemical energy is converted to kinetic energy

• sound energy is converted to electrical energy

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NGSS.MS-PS4-1

Francesca connected several light bulbs to a battery as shown in the illustration. After the lights bulbs were on for a few minutes, she placed her hand near one of the bulbs and discovered it was warm. What transformation of energy did Francesca observe?

• light energy to sound energy

• light energy to electrical energy

• electrical energy to light energy

• electrical energy to thermal energy

Trucks, cars, and motorcycles, as shown in the illustrations below, depend on internal combustion engines to move. An internal combustion engine uses air to burn a fuel, such as gasoline, which in turn causes the parts in the engine to move. What energy transformation occurs in an internal combustion engine?

• electrical energy to chemical energy

• chemical energy to kinetic energy

• thermal energy to electrical energy

• kinetic energy to chemical energy

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NGSS.MS-PS3-5

Leona uses a rechargeable electric toothbrush to brush her teeth. As it is used, the energy stored in the battery is depleted to make the toothbrush operate. What happens when Leona plugs her toothbrush into an electrical outlet to recharge?

• Electrical energy is transformed to kinetic energy.

• Electrical energy is transformed to chemical energy.

• Chemical energy is transformed to sound energy.

• Chemical energy is transformed to kinetic energy.

When you bend a glow stick, a small chamber inside breaks, releasing a substance that reacts with other substances inside the glow stick. The reaction that takes place causes the glow stick to glow. What energy transformation takes place when a glow stick is lit?

• electrical energy to light energy

• chemical energy to light energy

• thermal energy to light energy

• sound energy to light energy

Some hydroelectric plants generate electricity from water flowing though a dam as illustrated. Also illustrated is a windmill, which can generate electricity from wind. What transformation of energy occurs in both a hydroelectric plant and a windmill?

• chemical energy to electrical energy

• sound energy to electrical energy

• light energy to electrical energy

• kinetic energy to electrical energy

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NGSS.MS-PS3-5

Study the illustration. What is demonstrated in the illustration?

• the transformation of energy

• the creation of energy

• the conservation of energy

• the destruction of energy

What is true of energy?

• Energy can be transformed into different forms.

• Energy is easily created and destroyed

• Energy is a measure of the position of an object.

• Energy is a measure of the motion of an object.

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NGSS.MS-PS3-1

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