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5. 100 200 300 400 500 A- Static Electricity B- Flowing Electricity C- Magnetic Fields D- Transform It! E- Teacher’s Choice

6. What causes static electricity? A- when positive and negative charges no longer balance B- gaining electrons C- losing electrons D- when positive and negative charges balance A 100

7. What causes static electricity? A- when positive and negative charges no longer balance

8. A ________ object repels a positively charged object. A- negatively charged B- positively charged C- neutrally charged A 200

9. A ________ object repeals a positively charged object. B- positively charged

10. What type of particles will gather near the bottom of a cloud before energy is released as lightning? A- neutral particles B- positive and negative particles C- negative particles D- positive particles A 300

11. What type of particles will gather near the bottom of a cloud before energy is released as lightning? C- negative particles

12. A 400 Two objects that have the same charge ________ each other. A- repel B- attract C- stick to D- do nothing to

13. A 400 Two objects that have the same charge ________ each other. A- repel

14. What is the space around an electrically charged object called? A- magnetic field B- electric field C- electric force D- electric charge A 500

15. What is the space around an electrically charged object called? B- electric field

16. Which of these would be a good conductor for a closed circuit? A- plastic B- rubber C- copper D- wood B 100

17. Which of these would be a good conductor for a closed circuit? C- copper

18. A material that conducts electric current poorly is called.. A- an insulator B- a circuit C- a charge D- a conductor B 200

19. A material that conducts electric current poorly is called.. A- an insulator

20. What would happen to the other light bulbs in the circuit if one light bulb burns out? A – The others will remain on. B- The others will go out. B 300

21. What would happen to the other light bulbs in the circuit if one light bulb burns out? B- The others will go out.

22. Do new homes use electricity that is arranged in a series or parallel circuit? A- Series circuits B- Both series and parallel circuits. C- Parallel circuits B 400

23. Do new homes use electricity that is arranged in a series or parallel circuit? C- Parallel circuits

24. A(n) ________________ will allow electric charges to flow without any interruptions. A- open circuit B- resistance C- electric field D- closed circuit B 500

25. A ________________ will allow electric charges to flow without any interruptions. D- closed circuit

26. Where is a magnetic field the strongest? A- at the south-seeking pole B- at the north-seeking pole C- in the middle D- at both poles C 100

27. Where is a magnetic field the strongest? D- at both poles

28. Why does a compass needle point in a north-south direction? A- The needle is lightweight. B- The needle is pulled in the middle by Earth’s equator. C- The needle reacts to Earth’s magnetic poles. C 200

29. Why does a compass needle point in a north-south direction? C- The needle reacts to Earth’s magnetic poles.

30. C 300 What did Michael Faraday do when he discovered that changing a magnetic field created an electric current in a wire? A- He shared his invention with other scientists. B- He told no one of his investigation. C- He did not think he had discovered anything.

31. C 300 What did Michael Faraday do when he discovered that changing a magnetic field created an electric current in a wire? A- He shared his invention with other scientists.

32. What does this show? A- magnets attracting B- magnets repelling C- electric field C 400

33. What does this show? B- magnets repelling

34. C 500 The _____________ are caused by charged particles being attracted to the strongest part of Earth’s magnetic poles. A- North Pole B- Northern Lights C- Northern Particles D- Northern Auras

35. C 500 The _____________ are caused by charged particles being attracted to the strongest part of Earth’s magnetic poles. B- Northern Lights

36. In a doorbell, electromagnets help convert _________ to magnetic energy to mechanical energy. A- mechanical energy B- static electricity C- electric energy D 100

37. In a doorbell, electromagnets help convert _________ to magnetic energy to mechanical energy. C- electric energy

38. D 200 How can the strength of an electromagnet be increased? A- by using less current B- by using a smaller magnetic core C- by using a smaller magnet D- by using more turns in the metal coil

39. D 200 How can the strength of an electromagnet be increased? D- by using more turns in the metal coil

40. D 300 What is produced when a coiled wire is spun around a magnet? A- magnetic energy B- mechanical energy C- electrical energy D- geothermal energy

41. D 300 What is produced when a coiled wire is spun around a magnet? C- electrical energy

42. _______________ are often used in industry to lift heavy objects. A- Magnets B- Electromagnets C- Electric motors D- Permanent magnets D 400

43. _______________ are often used in industry to lift heavy objects. B- Electromagnets

44. A generator uses magnets and wires to turn mechanical energy to _____________. A- static electricity B- electrical energy C- energy of motion D- hydroelectric power D 500

45. A generator uses magnets and wires to turn mechanical energy to _____________. B- electrical energy

46. What is a charge in motion? A- parallel circuit B- electric current C- magnetism D- static electricity E 100

47. What is a charge in motion? B- electric current

48. One advantage of a(n) __________ is that its magnetic field can be turned off. A- electric current B- permanent magnet C- electromagnet D- generator E 200

49. One advantage of a(n) __________ is that its magnetic field can be turned off. C- electromagnet

50. E 300 Which of the following is NOT used to power generators? A- wind B- moving water C- hot rocks deep below earth’s surface D- static electricity

51. E 300 Which of the following is NOT used to power generators? D- static electricity

52. Lights are wired as shown. What happens to the circuit if one bulb burns out? A- Half of the bulbs light. B- All bulbs light. C- All but one light. E 400

53. Lights are wired as shown. What happens to the circuit if one bulb burns out? C- All but one light.

54. If you break a magnet in two pieces, what might happen? A- The magnetic field disappears. B- Each piece has only one pole. C- Each piece has a north and south pole. D- One magnet has two north poles and the other has two south poles. E 500

55. If you break a magnet in two pieces, what might happen? C- Each piece has a north and south pole.