Unit 4 Forms of Energy

Sid pushes a rock off his desk. What happens to the mechanical energy of the rock as it falls?

• It increases.

• It loses kinetic energy.

• It gains potential energy.

• It stays the same.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

NGSS.MS-PS3-2

Erin records several statements about kinetic energy in her notebook. Which is true?

• Kinetic energy is the energy of motion.

• Kinetic energy is the energy of an object at rest.

• Kinetic energy will cause motion in an object at rest.

• Kinetic energy is the total amount of potential energy and mechanical energy.

Tags

NGSS.MS-PS3-1

Sound is a form of energy. Which object produces light energy and heat energy but not sound energy?

• computer

• desk lamp

• power drill

• radio

Ella turns the propeller of a toy plane. By doing so, she twists a rubber band. She has to hold the propeller to keep the rubber band from turning it. What happens to the propeller's energy when Ella lets go?

• Kinetic energy decreases.

• Potential energy increases.

• Kinetic energy changes into electrical energy

• Potential energy changes into kinetic energy.

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NGSS.MS-PS3-5

NGSS.MS-PS3-4

In which object is electrical energy changed into sound energy and kinetic energy?

• A

• B

• C

• D

When sunlight reaches Earth, it can be reflected, refracted, or absorbed. Which would most likely refract light?

• grass

• mud

• ocean

• snow

Tags

NGSS.MS-PS4-2

Joshua turns on the television. Which statement explains what happens to the electrical energy that powers the television?

• It changes into light energy.

• It changes into sound and potential energy.

• It changes into light and potential energy.

• It changes into light, sound, and heat energy.

Lisa wrote these notes about energy. Which is incorrect?

• Potential energy is stored energy.

• Kinetic energy is the energy of motion.

• Electrical energy can change into light energy

• Mechanical energy changes as an object falls toward Earth's surface.

Tags

NGSS.MS-PS3-5

NGSS.MS-PS3-1

NGSS.MS-PS3-2

This toy has stopped making noise. Joaquin turns the knob. When Joaquin lets go of the knob, what will happen?

• Kinetic energy will change into sound energy.

• Kinetic energy will change into potential energy.

• Electrical energy will change into potential energy.

• Potential energy will change into kinetic and sound energy.

Tags

NGSS.MS-PS3-5

Chen shines a flashlight onto a ceiling. He places a dime in the center of the flashlight beam, so it partly covers the light. How would the beam of light and the shadow made by the dime appear on the ceiling?

• F

• G

• H

• I

Tags

NGSS.MS-PS4-2