Units 5/6 Test

1. 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 potentianl energy and mechanical energy.

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

• Computer
• Desk lamp
• Power drill
• Radio

3. Julie has a glass filled with ice and water. How could she make the ice melt more quickly?

• add more ice
• put a book under the glass
• put the glass under a lamp
• put the glass in a closet

4. 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

5. A mover pushes a box up a ramp. Which produces the most heat?

• Box moving against the ramp
• Ramp sitting against the truck
• Wind pushing against the box
• Mover's hands on the box

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

• grass
• mud
• ocean
• snow

7. 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.

8. Mali sets a bowl of hot soup on a table. Which statement best describes what happens when she puts the spoon in the soup?

• The air's temperature will decrease.
• The soup's temperature will increase.
• The bowl's temperature will increase.
• The spoon's temperature will increase.

9. Liang turns on her desk lamp and gets a cup of water. She sits at her desk to do homework. Which direction does heat flow to make Liang’s book feel warm after a few minutes?

• from the book to the cup
• from the desk to the book
• from the lamp to the book
• the book to the lamp

10. As Kai begins to move down a slide, which statement is true?

• He loses kinetic energy.
• He gains potential energy.
• Potential energy is about to change.
• Mechanical energy is about to change.