Question

student name: class/section: date:
directions: read each question carefully. circle the best answer.
part a - easy (remembering & understanding)

1. when something moves, it has

a. color b. energy of motion c. no energy d. shape

1. the energy of motion is called energy.

a. potential b. kinetic c. electric d. light

1. when an object is not moving, it can still have energy.

a. sleeping b. moving c. stored d. sound

1. stored energy is called energy.

a. potential b. kinetic c. sound d. heat

1. when you lift a ball higher, its potential energy

a. goes up b. goes down c. stays the same d. disappears

1. a ball rolling on the floor has energy

a. kinetic b. sound c. light d. no

1. a book on a high shelf has energy.

a. no b. potential c. sound d. light

1. when you drop a ball, its potential energy changes to energy.

a. sound b. kinetic c. light d. heat

1. kinetic energy means the object is

a. moving b. sleeping c. cold d. quiet

1. potential energy means the object is

a. flying b. still but can move c. hot d. shining

1. the faster something moves, the kinetic energy it has.

a. less b. more c. same d. none

1. when you push a swing, you give it

a. food b. sound c. energy d. color

1. when you ride a bike down a hill, your energy grows.

a. potential b. kinetic c. sound d. color

1. the higher an object is, the potential energy it has.

a. more b. less c. none d. same

1. energy can move from one object to

a. food b. another object c. color d. name

1. gravity pulls things

a. up b. down c. sideways d. away

1. when a toy car stops moving, it has kinetic energy.

a. more b. less c. none d. half

1. a rolling marble will stop when it loses its

a. energy b. color c. weight d. name

1. which has more potential energy?

a. a ball on the ground b. a ball on a high table c. a flat book d. a pencil

Explanation:

1. When something moves, it has energy of motion. Kinetic energy is the energy of motion.
2. The energy of motion is called kinetic energy.
3. When an object is not moving, it can still have stored (potential) energy.
4. Stored energy is called potential energy.
5. When you lift a ball higher, its potential energy goes up (since potential energy \(U = mgh\) and \(h\) increases).
6. A ball rolling on the floor has kinetic energy (because it is in motion).
7. A book on a high shelf has potential energy (due to its height).
8. When you drop a ball, its potential energy changes to kinetic energy (as it starts moving).
9. Kinetic energy means the object is moving.
10. Potential energy means the object is still but can move (stored energy).
11. The faster something moves, the more kinetic energy it has (kinetic energy \(K=\frac{1}{2}mv^{2}\), \(v\) is velocity).
12. When you push a swing, you give it energy.
13. When you ride a bike down a hill, your kinetic energy grows (as speed increases).
14. The higher an object is, the more potential energy it has (\(U = mgh\)).
15. Energy can move from one object to another object.
16. Gravity pulls things down.
17. When a toy car stops moving, it has none kinetic energy (kinetic energy is for moving objects).
18. A rolling marble will stop when it loses its energy (to overcome friction etc.).
19. A ball on a high table has more potential energy (higher \(h\) in \(U = mgh\)).

Answer:

1. B. energy of motion
2. B. kinetic
3. C. stored
4. A. potential
5. A. goes up
6. A. kinetic
7. B. potential
8. B. kinetic
9. A. moving
10. B. still but can move
11. B. more
12. C. energy
13. B. kinetic
14. A. more
15. B. another object
16. B. down
17. C. none
18. A. energy
19. B. A ball on a high table