Boys and Girls, please use the following questions to help you
prepare for the test on Chapter 8. You may print the following guide at
home or ask Mrs. Fox for a copy of the study guide at school
We will complete the study guide together at school or you may work
to complete the study guide at home and check and correct your
answers at school. I will choose questions from the
following to compose your chapter 8 test.

• 1) Science Chapter 8 STUDY GUIDE
  
  True/False
  Indicate whether the statement is true or false.
  
  ____ 1. A positive charge will attract another positive charge.
  
  ____ 2. Electricity is the result of electrical charges.
  
  ____ 3. Negative charges move more easily than positive charges do.
  
  ____ 4. Lightning is another form of electric discharge.
  
  ____ 5. Lightning often hits the lowest point in the area.
  
  ____ 6. Metals are good insulators.
  
  ____ 7. Surprisingly, humans make good electrical conductors.
  
  ____ 8. Electrical current keeps charges moving, while static
  electricity builds them up.
  
  ____ 9. To keep charges moving, a circuit cannot have any breaks.
  
  
  
  ____ 10. The branches of a parallel circuit divide the electrical
  current between them.
  
  ____ 11. Most electrical devices are made of only series circuits.
  
  ____ 12. A power source with more voltage can make a light bulb glow
  brighter.
  
  ____ 13. Wall outlets have 120 volts.
  
  ____ 14. Increasing the resistance of a circuit also increases the
  flow of electrical charges through it.
  
  ____ 15. Because rubber is a good insulator, it is difficult to make
  any electrical current flow through it.
  
  ____ 16. A short circuit can stop the rest of the circuit from
  operating properly.
  
  ____ 17. Magnetic attraction is caused by magnetic force.
  
  ____ 18. A north pole will attract another north pole.
  
  ____ 19. When allowed to move freely, magnets will line up in an
  east-west direction.
  
  ____ 20. If you wrap the wire in an electrical circuit into a loop,
  it increases the strength of the magnetic field.
  
  
  True   False
• 2) Enter your question here.
  
  Multiple Choice
  Identify the choice that best completes the statement or answers the
  question.
  
  ____ 21. Electrical charge is a(n) _____ property of matter.
  
  a. chemical c. electrical
  b. physical d. powerful
  
  
  ____ 22. A positive charge will repel a _____ charge.
  
  a. positive c. neutral
  b. negative d. static
  
  
  ____ 23. A negative charge will attract a _____ charge.
  
  a. positive c. neutral
  b. negative d. static
  
  
  ____ 24. Rubbing objects together produces _____ static electricity.
  
  a. more c. neutral
  b. less d. the same
  
  
  ____ 25. What happens to charged particles when two objects touch?
  
  a. Nothing ever happens. c. They lose their charge.
  b. They are released into the air. d. They can move from one object
  to the other.
  
  
  ____ 26. When you walk across carpet and then touch a doorknob, the
  shock you may feel is _____.
  
  a. static c. positive charges
  b. an electrical discharge d. negative charges
  
  
  ____ 27. Before lightning strikes, _____ droplets move to the bottom
  of a cloud and interact with charges on the ground below.
  
  a. negatively charged c. hot
  b. positively charged d. cold
  
  
  ____ 28. Conductors allow charges to move _____.
  
  a. one at a time c. slowly
  b. quickly d. not at all
  
  
  ____ 29. What cause clothes from a dryer to stick together?
  
  a. the attraction of positive and negative charges c. the attraction
  of two negative charges
  b. the attraction of two positive charges d. likeness and color keep
  clothes together
  
  
  ____ 30. Lightning is a type of _____.
  
  a. negative charge c. current electricity
  b. static electricity d. short circuit
  
  
  ____ 31. A flow of electrical charges is known as _____.
  
  a. resistance c. static electricity
  b. electrical current d. voltage
  
  
  ____ 32. A switch in a circuit _____.
  
  
  
  a. acts as an insulator c. allows or stops the flow of electricity
  b. absorbs electricity d. keeps the flow of electricity at a safe level
  
  
  ____ 33. Study the diagram below.
  
  
  
  Which of these belongs in the blank box?
  
  a. Light bulb glows c. A spark is created
  b. Lightning is created d. Broken path
  
  
  ____ 34. A complete, unbroken circuit is called a(n) _____.
  
  a. closed circuit c. switch
  b. open circuit d. load
  
  
  ____ 35. When a light bulb burns out in a series circuit, it creates
  a(n) _____.
  
  a. closed circuit c. switch
  b. open circuit d. load
  
  
  ____ 36. A circuit is a series circuit as long as _____.
  
  a. all the parts are connected one after another c. the switch is open
  b. the switch is closed d. all the parts are separated
  
  
  ____ 37. A series circuit can best be compared to _____.
  
  a. a two-way highway c. a one-way circular street
  b. an interstate with many lanes of traffic d. a road with many stop
  signs
  
  
  ____ 38. The different paths in a parallel circuit are often called
  _____.
  
  a. wires c. stems
  b. branches d. connectors
  
  
  ____ 39. A circuit containing both series and parallel circuits is
  called a _____ circuit.
  
  a. multiple c. combination
  b. double d. perpendicular
  
  
  ____ 40. If you connect two light bulbs on one branch of a parallel
  circuit, you have created a _____ circuit.
  
  a. series c. parallel
  b. combination d. broken
  
  
  ____ 41. _____ is the strength of a power source.
  
  a. Resistance c. Current
  b. Voltage d. Battery
  
  
  ____ 42. _____ is the ability to oppose or slow down electrical current.
  
  a. Resistance c. Current
  b. Voltage d. Battery
  
  
  ____ 43. _____ allows electrical energy to be changed into other
  forms of energy, such as light and heat.
  
  a. Resistance c. Current
  b. Voltage d. Battery
  
  
  ____ 44. A path with almost no resistance is sometimes called a(n)
  _____ circuit.
  
  a. complete c. short
  b. incomplete d. broken
  
  
  ____ 45. Stove burners get very hot because they have _____ resistance.
  
  
  
  a. no c. a lot of
  b. a little d. a high voltage
  
  
  ____ 46. If you decrease the resistance of a circuit, what will
  happen to the current in the circuit?
  
  a. It will not change. c. It will decrease.
  b. It will stop flowing completely. d. It will increase.
  
  
  ____ 47. About 2,000 years ago, where did people find rocks that
  would attract small pieces of iron?
  
  a. Mississippi c. Magnesia
  b. Monet Carlo d. Madagascar
  
  
  ____ 48. The two poles of a magnet are called the ______ and _____
  poles.
  
  a. north and south c. right and left
  b. like and unlike d. top and bottom
  
  
  ____ 49. _____ poles of magnets attract.
  
  
  
  a. Like c. Strong
  b. Unlike d. Weak
  
  
  ____ 50. A south pole will _____ a north pole.
  
  a. repel c. spin in a circle around
  b. attract d. disappear near
  
  
  ____ 51. A _____ is an instrument that uses Earth’s magnetic field to
  help people find directions.
  
  a. magnet c. speedometer
  b. compass d. electromagnet
  
  
  ____ 52. The north pole of a magnet or compass lines up with _____.
  
  a. Earth’s south pole c. the east
  b. the west d. Earth’s north pole
  
  
  ____ 53. The south pole of a magnet or compass lines up with _____.
  
  a. Earth’s south pole. c. the east.
  b. the west. d. Earth’s north pole.
  
  
  ____ 54. A(n) _____ is an electrical circuit that produces a magnetic
  field.
  
  a. magnet c. speedometer
  b. compass d. electromagnet
  
  
  ____ 55. When were electromagnets discovered?
  
  
  
  a. 1700s c. 1800s
  b. 1600s d. 1900s
  
  
  ____ 56. How can you make an electromagnet stronger?
  
  a. Loop the wire into a coil. c. Apply a compass.
  b. Decrease the electrical current. d. Use a carbon-based core.
  
  
  ____ 57. A loudspeaker is a device that changes electrical energy
  into _____.
  
  a. light c. sound
  b. heat d. colors
  
  
  ____ 58. A _____ is a device that uses a magnet to convert sound into
  electrical signals.
  
  a. telephone c. loudspeaker
  b. microphone d. stereo
  
  
  ____ 59. Which of the following does not use an electromagnet?
  
  a. dishwasher c. stove burner
  b. electric guitar d. vacuum cleaner
  
  

  Answer 1
  Answer 2
  Answer 3
  Answer 4
  
• 3) Yes/No
  Indicate whether you agree with the statement.
  
  ____ 60. Is an electrical charge something you can see?
  
  ____ 61. Can you weigh electricity?
  
  ____ 62. Will a balloon stick to a wall forever?
  
  ____ 63. Do electrical discharges always result in small shocks?
  
  ____ 64. Is rubber a good electrical conductor?
  
  ____ 65. Can electricity flow through an open circuit?
  
  ____ 66. Can electrical charges be made to flow through materials?
  
  ____ 67. Can a series circuit have more than one load or power source?
  
  ____ 68. One bulb in a series circuit burns out. Will current flow
  in the circuit?
  
  ____ 69. In a series circuit with many bulbs, if one bulb burns out,
  will the others still light up?
  
  ____ 70. If a light bulb in a parallel circuit burns out, will the
  other(s) still light up?
  
  ____ 71. Are insulators good resistors?
  
  ____ 72. Copper wire is a good conductor. Is it also a good resistor?
  
  ____ 73. Would rubber make a good resistor?
  
  ____ 74. Can a short circuit cause a fire?
  
  ____ 75. Will a south pole repel a north pole?
  
  ____ 76. Do loudspeakers use more than one magnet?
  
  ____ 77. Are electromagnets used in telephones?
  
  ____ 78. Can an electromagnet be switched on and off?
  
  ____ 79. Does a telephone mouthpiece use a loudspeaker?
  
  
  True   False
• 4) Matching
  
  Match each item to the correct description below.
  a. series circuit f. static electricity
  b. parallel circuit g. discharge
  c. electrical current h. magnetic attraction
  d. circuit i. pole
  e. electromagnet j. repel
  
  
  ____ 80. the ends of a magnet
  
  ____ 81. the path along which electrical current flows
  
  ____ 82. a circuit in which electrical current flows through more
  than one path
  
  ____ 83. fast movement of electrical charges
  
  ____ 84. to push away
  
  ____ 85. a circuit of electrical current that flows in the same
  direction along a single path
  
  ____ 86. the attraction caused by magnetic force
  
  ____ 87. the buildup of electrical charges on an object
  
  ____ 88. formed when an electrical current flows through wire wrapped
  around an iron core
  
  ____ 89. the flow of electrical charges through a circuit
  
  
  Answer:
• 5) Short Answer
  
  90. Like charges _______________ one another.
  
  91. Positive and negative are opposite __________________.
  
  92. To ________________ means to push away from.
  
  93. Lightning occurs when charges in the bottom of the cloud are
  attracted to the ____________________ charges on the ground.
  
  94. If you touch an insulator, you do not feel a shock because the
  charges move ___________________.
  
  95. A _________________ transfers heat easily.
  
  96. The path along which electrical current flows is called a
  _____________________.
  
  97. A simple circuit has 3 parts: a power source, connectors, and
  ________________________.
  
  
  Answer: