(c.) Beating a drum represents what kind of energy transfer?

1. (c.) Beating a drum represents what kind of energy transfer? • Electrical to mechanical • Mechanical to sound • Chemical to electrical • Sound to heat

2. (c.) A car uses gasoline for fuel. Which of the following describes the energy conversion from gasoline to the movement of the car? • Mechanical to electrical • Heat to light • Electrical to nuclear • Chemical to mechanical

3. (c.) Which of the following is an example of electrical energy being converted to light energy? • Ringing a doorbell • Striking a match • Turning on a computer monitor • Water falling over a dam

4. (c.) Which of the following uses mechanical energy to function? • Computer • Battery • Microwave oven • Windmill

5. (a.) An engine converts 95% of energy input into useful work output. What happens to the remaining 5% of the energy? • It is converted to heat or to some other form of unusable energy. • It is destroyed in the process of converting from one type of energy to another. • It is stored in the engine for later use. • It is lost along with the mass of the fuel.

6. (d.) Francisco was heating soup in a metal pan on the stove. He noticed that the soup was about to boil over. He quickly grabbed the handle of the pan to remove it from the heat. Just as quickly, he let go of the pan because he burned his hand. What kind of heat transfer occurred through the metal handle of the pan? • Radiation • Convection • Conduction • Insulation

7. (d.) How does the energy from the Sun reach the Earth? • Conduction • Convection • Radiation • Insulation

8. (d.) Which of the following specifically describes the transfer of energy? • Heat • Temperature • Average kinetic energy • Thermal energy

9. (d.) A material that does NOT conduct thermal energy easily is a(n) • Conductor • Metal • Radiator • Insulator

10. (c.) Which of the following correctly describes the energetic transition that takes place when you turn on a light bulb? • Turning on a light bulb is the conversion of electrical energy to electromagnetic energy. • Turning on a light bulb creates thermal energy from chemical energy. • Turning on a light bulb creates electrical energy from electromagnetic energy. • Turning on a light bulb is the conversion of electrical energy to chemical energy.

11. (d.) Mara has a glass beaker of water with a thermometer in it. At time t=0 minutes, the thermometer reads 17*C. At time t=40 minutes, the thermometer reads 25*C. Which statement correctly describes this scenario? • The temperature of the water increased because of transferred energy to the surrounding air. • The temperature of the water increased because the surrounding air transferred thermal energy to the water. • The temperature of the water increased because the thermal energy of the water and air were equivalent. • The temperature of the water increased because glass is a thermal insulator.

12. (b.) Which is an example of kinetic energy? • An apple • A light bulb • An ocean wave • A battery

13. (a.) Lupe conducts an experiment to see how much electricity she can generate by pedaling a bicycle hooked up to a generator. At the end of the experiment, she calculates that she did 500 Joules of work but only produces 400 Joules of energy in the form of electricity. Where did the other 100 Joules go? • It was destroyed by the friction of the bike. • Friction between the parts of the bike lowered energy output. • The rubber wheels of the bike block some of the electricity. • It was recycled back into the bike generator.

14. (b.) Which of the following is an example of potential energy? • A rock rolling down a hill • A rock resting at the bottom of a hill • A rock at the top of a hill • A rock bouncing down a hill

15. (b.) Which of the following is an example of kinetic energy? • A baseball flying through the air • A baseball in a catcher’s mitt • A baseball in a locker • A baseball stuck in a house gutter

16. (b.) Kinetic and potential are terms that describe the expression of the energy of an object. Which of the following statements is true? • All potential energy becomes kinetic energy. • Potential energy is expressed as motion. • All kinetic energy becomes potential energy. • Potential energy is stored.

17. (d.) A recently used hot ceramic teapot is placed on a cold trivet. Which statement is correct about the sequence of thermal energy transfers? • The air transfers energy to the teapot and trivet, and they become cool. • The teapot transfers all of its energy to the air and becomes cool. • The teapot transfers some of its energy to the trivet and some energy to the air and becomes cool. • The trivet transfers energy to the teapot, and the teapot becomes cool.

18. (d.) What process moves thermal energy from the fire in a fireplace to a dog lying on a rug in front of the fireplace? • Conduction • Convection • Radiation • Fission

19. (c.) In an electric car, a car battery allows the engine to crank. The engine then moves the car from one place to another. Trace the energy transformations in this process. • Chemical, mechanical, electrical • Electrical, chemical, mechanical • Chemical, electrical, electrical • Chemical, electrical, mechanical

20. (b.) Which of the following is the BEST example of potential energy? • A fire • A match • A balloon • Thunder

21. (c.) A nuclear power plant uses the fission process to generate heat, which turns turbines, which in turn create electricity. A solar cell absorbs radiant solar energy and turns it directly into electricity. A hydroelectric power station uses the movement of water to turn turbines, which in turn create electricity. Electricity is generated from each of these energy sources. Which does not involve the use of mechanical energy? • Nuclear power generation • Solar power generation • Hydroelectric power generation • All of these methods involve the use of mechanical energy

22. (b.) Jill places a bottle a message in a bottle and drops it off a cliff into the ocean. When does the bottle have the greatest kinetic energy? • When Jill holds the bottle in her hand, just before dropping it • Just after Jill releases the bottle • Just before the bottle hits the surface of the water • When it is floating on the water

23. (d.) Which type of heat transfer causes macaroni to rise and fall in a pot as it is cooking? • Radiation • Convection • Circulation • Conduction

24. (d.) Mark adds liquid water to an ice tray and places it in the freezer. What happens? • Thermal energy flows from the higher-energy phase (water) to the lower-energy phase (cold air). • Thermal energy flows from the higher-energy phase (cold air) to the lower-energy phase (water). • Cold radiates from the cold air into the warm water. • The insulation of the ice tray keeps the temperature from changing much.

25. (b., c.) A wet cell battery is an example of stored potential energy. Once connected to a load, the stored energy is converted. Describe the conversion of energy that results in the movement of the hands in a battery-powered clock. • Chemical to electrical to mechanical • Chemical to thermal to electrical • Electrical to thermal to mechanical • Chemical to electrical to thermal

26. (d.) Hot gases rise from the interior of the sun. As they near the surface, they begin to cool. Cooler gasses sink, forming loops of gas that move energy toward the sun’s surface. This type of energy transfer is called • Fusion • Radiation • Convection • Conduction

27. (b.) In which of the following substance do the particles have the least amount of kinetic energy? • Steam • Tap water • Warm water • Ice cubes

28. (c.) Which of the following is a form of electrical energy? • Sunlight • A burning candle • A falling apple • Lightning

29. (b.) Hot lava contains a large amount of thermal energy. What happens to the energy of the molecules in the lava as the lava cools? • The molecules gain potential energy. • The molecules gain more kinetic energy. • The molecules lose most of their chemical energy. • The molecules lose some of their kinetic energy.

30. (d.) Which term describes how energy is transferred when a heating pad is used to warm your hands? • Radiation • Convection • Conduction • Thermal expansion

31. (c.) Sue wants to measure the average energy of motion of the air outside. Which instrument should she use? • A scale • A balance • A thermometer • A graduated cylinder

32. (a.) Besides heat, what is another outcome of every energy transformation? • Energy is destroyed • Matter is formed • Mass is gained • Work is done

33. (c.) Wind has energy because • It can change direction • It can do work • It has mass • It is electrically charged

34. (b.) When standing on the diving board, which diver has the least potential energy (PE = m x h)? • Clark • Delgado • Simmons • Chen

35. (b.) Which unit is the measure for energy? • Newton • Horsepower • Kilowatt • Joule

36. (a.) A pendulum will eventually slow and stop because of • Friction • Weight • Kinetic Energy • Potential Energy

37. (a.) What energy transformation takes place when wood is burned? • Nuclear to thermal • Thermal to electrical • Chemical to thermal • Mechanical to thermal

38. (d.) Two solid metal blocks are placed in a container. If there is a transfer of heat between the blocks, then they must have different • Boiling points • Melting points • Specific heats • Temperatures

39. (c.) Jan turns on a lamp so she can read. What type of energy provided by the lamp helps Jan read? • nuclear energy • electromagnetic energy • chemical energy • thermal energy

40. (c.) When the strings of the acoustic guitar are plucked they vibrate. These vibrations are transferred to particles in the air. What kind of energy is produced by these vibrating particles? • chemical energy • nuclear energy • electrical energy • sound energy

41. (c.) When moving air or wind strikes the blades of a windmill, it causes the blades to turn. What kind of energy is involved in the movement of the blades? • mechanical energy • nuclear energy • electrical energy • electromagnetic energy

42. (c.) What type of energy is released if the forces that hold the protons and neutrons of an atom in place are overcome? • electrical energy • nuclear energy • electromagnetic energy • thermal energy

43. (a.) Which of the following correctly states the law of conservation of energy? • Energy cannot be created or destroyed but can be converted from one form to another. • Energy can be created or destroyed as well as being converted from one form to another. • Energy is created when it is converted from one form to another. • In most systems, some energy is destroyed and lost as heat.