PS.5 Unit Test Review

What best describes the energy conversion the occurs when you turn on a hair dryer?

• Nuclear ⇒ electrical ⇒ thermal and sound

• Chemical ⇒ thermal ⇒ light and sound

• Electrical ⇒ kinetic ⇒ thermal and sound

• Kinetic ⇒ light ⇒ thermal and sound

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NGSS.MS-PS3-3

NGSS.MS-PS3-5

Reorder the followingAs the camper turns on the flashlight, what is the sequence of energy conversions that take place?

• Chemical Energy

• Electrical Energy

• Light Energy

The object is still, then it is dropped, and then it is still again. Correctly label the points in the fall of the object.

• Kinetic Energy

• Most potential energy

• Least potential Energy

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NGSS.MS-PS2-4

NGSS.MS-PS3-2

NGSS.MS-PS3-5

At which point does a roller-coaster have the greatest kinetic energy?

• 
  At the top of the tallest hill

• Kinetic energy never changes

• As it is climbing up the tallest hill

• At the bottom of the tallest hill

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NGSS.MS-PS3-1

NGSS.MS-PS3-5

In the picture above, which ball has the greatest potential energy?

• All of the balls have the same amount of potential energy

• Ball B

• Ball C

• Ball A

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NGSS.MS-PS2-4

NGSS.MS-PS3-2

The boy in the picture is standing on a diving board.  Which of the following actions would increase the gravitational potential energy of the boy?

• Placing the boy on a higher diving board

• Placing the boy on a lower diving board

• Replacing the boy in the picture with a smaller boy

• Placing the boy on the ground

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NGSS.MS-PS3-2

Which energy conversion best describes change that takes place in a microwave oven?

• Nuclear → thermal + chemical

• Chemical → thermal + light

• Electrical → light + thermal

• Sound → thermal + electrical

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NGSS.MS-PS3-3

What is the best example of a machine that converts electrical energy into kinetic energy and sound energy?

• A toaster

• A flashlight

• An iron

• An electric toothbrush

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NGSS.MS-PS3-5

When you stretch a rubber band you give it —

• potential energy

• thermal energy

• chemical energy

• mechanical energy

What energy transfer is shown in the picture?

• Electrical to mechanical to chemical

• Mechanical to chemical to electrical

• Chemical to electrical to light

• Mechanical to light to chemical