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Magnetism and Electricity

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  • Objects with the same kind of electric charge __________ each other.
    attract
    repel
    electromagnet
  • True or False: The magnetism of a BAR MAGNET is temporary because it has a switch that turns electric current on and off.
    True
    False
  • When electric charges build up on the surface of an object, ___________ occurs.
    static electricity
    current electricity
    a circuit
  • In CURRENT electricity, the negative charges have a continuous flow through a material.
    True
    False
  • The invisible magnetic field can be observed by sprinkling ____________ around the magnet.
    iron fillings
    bits of paper
    pieces of plastic
  • The only electric charge that can move from object to object is a POSITIVE charge.
    False
    True
  • All matter is made up of tiny particles that have electric charges. The tiny particles are called _______.
    conductors
    atoms
    circuits
  • A form of energy that involves the flow of electric charges is called ___________.
    magnetism
    electricity
    an insulator
  • How have electromagnets helped people solve real life problems? (Tell at least two ways in two complete sentences)
    Electromagnets are used in fire alarms, toasters, microwaves, doorbells, TV's, computers, trains, and MRI machines.
  • The area around a magnet where the force of the magnet can act is called the ________________.
    repel
    magnetic field
    electromagnet
  • An ELECTROMAGNET can be made stronger by increasing the electric current flowing through the electromagnet's wire.
    True
    False
  • An object that attracts certain metals is called ________________.
    a magnet
    a circuit
    an insulator
  • The pushing or pulling force caused by a magnet is called ______________.
    attract
    poles
    magnetism
  • A magnet's magnetism is strongest at the __________.
    electromagnet
    repel
    poles
  • A material that allows electricity to flow through it easily is called ________.
    a conductor
    an insulator
    a circuit
  • A magnet that forms when electric current flows through a wire that is wrapped around a piece of metal is called an _________________.
    magnetic field
    electromagnet
    poles
  • How can magnets be helpful?
    They are used in technology! The can help with tools (like a magnetic screwdriver).
  • Why is it important to be safe with electricity?
    We need to protect our bodies because we are conductors. You could get shocked and injured if you don't make safe choices.
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