Energy Test Review

1. Energy Test Review

2. Question #1 • The form of energy associated with moving electrons. • Electrical Energy • Nuclear Energy • Thermal/Heat Energy • Chemical Energy Answer: Electrical Energy

3. Question #2 • The unit used to measure energy. • Work • Energy • Joule • Centimeter Answer: Joule

4. Question #3 • The form of energy that is stored by an object’s position, height, or chemical bonds. • Thermal Energy • Mechanical Energy • Kinetic Energy • Potential Energy Answer: Potential Energy

5. Question #4 • The ability to do work. • Work • Energy • Joule • Nuclear Energy Answer: Energy

6. Question #5 • The form of Potential Energy that is dependent on the height of the object. • Elastic Potential Energy • Electrical Energy • Kinetic Energy • Gravitational Potential Energy Answer: Gravitational Potential Energy

7. Question #6 • The form of energy associated with light. • Electrical Energy • Nuclear Energy • Thermal/Heat Energy • Radiant Energy Answer: Radiant Energy

8. Question #7 • The energy found in a moving object. • Mechanical Energy • Radiant/Light Energy • Thermal/Heat Energy • Chemical Energy Answer: Mechanical Energy

9. Question #8 • The form of energy that bonds atoms and molecules together. • Chemical Energy • Radiant/Light Energy • Thermal/Heat Energy • Kinetic Energy Answer: Chemical Energy

10. Question #9 • Energy found in the nucleus of an atom. • Chemical Energy • Nuclear Energy • Radiant/Light Energy • Mechanical Energy Answer: Nuclear Energy

11. Question #10 • The energy of stretched or compressed objects such as a spring. • Kinetic Energy • Gravitational Potential Energy • Elastic Potential Energy • Chemical Potential Energy Answer: Elastic Potential Energy

12. Question #11 • The form of energy involved in the internal motion of atoms also called heat. • Chemical Energy • Light Energy • Thermal Energy • Mechanical Energy Answer: Thermal Energy

13. Question #12 • The kinetic energy of an object increases as the object: • Slows down • Stops moving • Loses mass • Speeds up Answer: Speeds up

14. Question #13 • Changes in the forms of energy are called: • Transformations • Turbines • Engines • Conservations Answer: Transformations

15. Question #14 • A burning candle is in the process of transforming • Heat energy into chemical energy • Chemical energy into light and heat • Chemical energy into mechanical energy • Chemical energy into nuclear energy Answer: Chemical energy into light and heat

16. Question #15 • The law of conservation of energy states that energy cannot be • created or destroyed, it is just changed from one form to another • waves or matter, it is just changed from potential to kinetic • chemical or nuclear, it is just changed from mechanical to electrical • only potential or only kinetic, it is just changed from one form to another Answer: created or destroyed, it is just changed from one form to another

17. Question #16 • The members of a city council are researching the construction of a new hydroelectric power plant on an existing dam. The city currently burns coal for its power. In the new plant, water from the river would pass through a turbine in the power plant as shown. The turbine would turn, which would cause the generator to produce electricity. The hydroelectric power plant and dam would not block the entire river. The council members discuss the advantages and disadvantages of using a hydroelectric power plant to generate electricity. Describe one environmental advantage and one environmental disadvantage of building the hydroelectric power plant proposed by the city council.

18. Question #16 - Answer • Advantages • Water is renewable and this source of energy will be available indefinitely • Reducing the use of coal as an energy source will decrease air pollution • Disadvantages • The change of river flow has environmental impacts on organisms and ecosystems • Metal in the power plant could break down and pollute the river • Can cause increased erosion of river beds further downstream • Can cause increased flooding which can damage or destroy habitats

19. Question #17 • Using the illustration, identify the original form of energy and then what each form is transformed into.

20. Question #17 - Answer • Waterfall • Potential  Kinetic/Mechanical • Sun to Trees • Radiant  Chemical • Sailboat • Wind  Mechanical • Swing • Potential  Kinetic/Mechanical

21. Question #18 • An example of stored chemical energy. • Gasoline in an automobile • An electric motor • The suns energy • Light Answer: gasoline in an automobile

22. Question #19 • Which of the following is NOT an example of an object with potential energy? • Car battery • Diver prepared to jump off a diving board • Moving baseball • Wrecking ball before it swings Answer: moving baseball

23. Question #20 • Mechanical energy is converted into heat energy when • Food is stored in fat cells • Hands are rubbed together • Charcoal is burned on a grill • Lasers are used to make a colorful display Answer: hands are rubbed together

24. Question #21 • The energy in the fuel of a rocket engine is: • Kinetic energy • Nuclear energy • Mechanical energy • Chemical energy Answer: Chemical Energy

25. Question #22 • An example of kinetic energy continuously being changed to potential energy and back might be: • A girl jumping on a trampoline • A rock poised on the top of a mountain • A moving train • Electric charges moving in a straight path Answer: A girl jumping on a trampoline

26. Question #23 • When a plant uses the sun’s energy during photosynthesis the transformation is: • Light/radiant energy converted to kinetic energy • Light/radiant energy converted to heat/thermal energy • Heat/thermal energy converted to mechanical energy • Light/radiant energy converted to chemical energy Answer: Light/Radiant energy converted to chemical energy

27. Question #24 • An example of an object with kinetic energy is a • Car stopped at a red light • Boulder about to fall off a cliff • Skier hurtling through the air • Photograph of a bicycle race Answer: Skier hurtling through the air

28. Question #25 • A waterfall is an example of • Nuclear energy • Chemical energy • Mechanical energy • Electromagnetic energy Answer: Mechanical Energy

29. Question #26 • This flashlight uses 3 different forms of energy. Which of these shows the energy changes in the correct order • mechanical  heat chemical • heat chemical light • electrical  mechanical chemical • chemical electrical  light Answer: chemical electrical  light

30. Question #27 • Which of the following could best be used to demonstrate energy being transformed from electricity to heat? • A magnifying glass • A triple beam balance • A toaster • A gas oven Answer: a toaster

31. Question #28 • What type of energy does the water behind the dam represent? • kinetic • potential • electrical • chemical Answer: potential

32. Question #29 • The law of conservation of energy means that the hydroelectric power station • Converts all of the water’s energy into electricity • Efficiently transforms one type of energy into another • Converts all the water’s energy into different forms of energy • Conserves the environment by generating no greenhouse gases Answer: Converts all the water’s energy into different forms of energy

33. Question #30 • The diagram below represents a diver’s motion from the top of a high diving board into a pool of water. At which labeled point does the diver have the least potential energy? • 1 • 2 • 3 • 4 Answer: 4

34. Question #31 • The diagram below shows a pinwheel rotating above a lit candle. The arrows indicate the direction of air flow. Which energy transformation is best shown in this diagram? • heat to mechanical • mechanical to light • sound to heat • heat to sound Answer: heat to mechanical

35. Question #32 • A ball is released from rest at position 1. The diagram shows the ball in four positions as it rolls along a track from left to right. In which position does the ball have its minimum gravitational potential energy and maximum kinetic energy? • 1 • 2 • 3 • 4 Answer: 3

36. Question #33 • Electricity is produced in a hydroelectric plant when moving water turns a turbine. Which describes this energy transformation from the turning turbine to electricity? • kinetic energy into electrical • nuclear energy into electrical • thermal energy into electrical • chemical energy into electrical Answer: kinetic into electrical

37. Question #34 • What letter represents the greatest gravitational potential energy? • Letter A • Letter G • Letter E • Letter D Answer: Letter D

38. Question #35 • When you walk into a dark room and turn on a lamp, what is true? • You are converting electrical energy into potential energy • You are converting kinetic energy into radiant and chemical energy • You are converting electrical energy into radiant energy and thermal energy • You are converting kinetic energy into potential energy and radiant enegy • Answer: You are converting electrical energy into radiant energy and thermal energy

39. Question #36 • Energy is constantly being converted from one form to another. What happens when one form of energy is converted to another form? • Some energy is always destroyed by the process • Some new energy is always created • Energy is neither created nor destroyed • Energy may be destroyed or created, depending on the situation Answer: Energy is neither created nor destroyed

40. Question #37 • Which describes the potential and kinetic energy of the pendulum at position X? • Potential energy is at its lowest and kinetic energy is at its lowest • Potential energy is at its highest and kinetic energy is at its lowest • Kinetic energy is at its highest and potential energy is at its lowest • Kinetic energy is at its highest and potential energy is at its highest Answer: Kinetic energy is at its highest and potential energy is at its lowest

41. Question #38 • Which of the following sources can be used to produce electrical energy? • The sun • The wind • Coal • All of the above Answer: All of the above

42. Question #39 • What type of energy does the rock at the top of the hill have? • Kinetic due to position • Kinetic due to motion • Potential due to position • Potential due to motion Answer: Potential due to position

43. Question #40 • Acoustical, or sound, energy is transferred in • gusts • beams • waves • bursts Answer: waves

44. Question #41 • What type of energy is being given off in the picture? • chemical • nuclear • acoustic • thermal Answer: thermal

45. Question #42 • How does the device shown convert energy? • It converts mechanical energy to electrical energy • It converts electrical energy to acoustic energy • It converts acoustic energy to chemical energy • It converts chemical energy to mechanical energy Answer: It converts electrical energy to acoustic energy

46. Question #43 • Light bulbs are designed to convert electric energy to light energy. Some light bulbs are more efficient than others. When comparing two light bulbs, the more efficient bulb will produce less • heat • light • electricity • photons Answer: heat