Test - Unit

Question 1

3. Where would this roller coaster have the greatest kinetic energy?

Answer 1

C

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Question 2

5. Green plants convert light energy from the sun into ____ during photosynthesis.

Answer 2

Chemical potential energy

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Question 3

7. The picture below shows a person swinging a baseball bat, starting at point A. The gravitational potential energy of the bat would be the greatest at.

Answer 3

Point A

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Question 4

11. How much force is required to lift a rock a vertical distance of 8 m if 80 J of work were done?

Answer 4

10 N

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Question 5

14. Conduction is the transfer of heat energy by______ .

Answer 5

Electromagnetic waves

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Question 6

20. The diagram to the right shows four locations in a temperature field. The temperature of each location is given in degrees Celsius. Heat energy will normally flow from:

Answer 6

C to B

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Question 7

21. When oil is burned to produce electricity, the electrical energy produced is less than the potential energy in the oil. Which best explains this observation?

Answer 7

Some of the potential energy in oil is converted into forms of energy other than electricity.
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Question 9

26. Which pictures show the same type of thermal energy transfer?

Answer 9

They all show different types of transfer.

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Question 10

27. The rate at which work is done is ____.

Answer 10

Power

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Question 11

28. When an object is dropped what happens to potential and kinetic energy as it falls?

Answer 11

GPE goes down, KE goes up

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Question 12

34. When water at 10oC is heated to 20o C its kinetic energy

Answer 12

Increases

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Question 13

35. Through which of the following will convection most likely occur?

Answer 13

Liquids and gasses

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Question 14

36. The kinetic energy of an object increases as its ______ increases.

Answer 14

Velocity

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Question 15

38. This roller coaster car starts from rest and moves along the track. At what point does the roller coaster car have the greatest potential energy?

Answer 15

B

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Question 16

39. When you hold an ice cube, your hand feels cold because

Answer 16

heat flows from your hand to the ice cube.

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Question 17

40. As the time required to do a given amount of work decreases, the power developed

Answer 17

Increases

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Question 18

41. Energy Transformations: A windmill would be an example of

Answer 18

Kinetic to electrical

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