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Magnetism and Electricity

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  • 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 pushing or pulling force caused by a magnet is called ______________.
    poles
    magnetism
    attract
  • All matter is made up of tiny particles that have electric charges. The tiny particles are called _______.
    conductors
    atoms
    circuits
  • A magnet's magnetism is strongest at the __________.
    poles
    repel
    electromagnet
  • Objects with the same kind of electric charge __________ each other.
    electromagnet
    repel
    attract
  • A magnet that forms when electric current flows through a wire that is wrapped around a piece of metal is called an _________________.
    magnetic field
    poles
    electromagnet
  • The only electric charge that can move from object to object is a POSITIVE charge.
    False
    True
  • A material that allows electricity to flow through it easily is called ________.
    a conductor
    a circuit
    an insulator
  • True or False: The magnetism of a BAR MAGNET is temporary because it has a switch that turns electric current on and off.
    False
    True
  • 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.
  • A form of energy that involves the flow of electric charges is called ___________.
    magnetism
    an insulator
    electricity
  • An ELECTROMAGNET can be made stronger by increasing the electric current flowing through the electromagnet's wire.
    True
    False
  • How can magnets be helpful?
    They are used in technology! The can help with tools (like a magnetic screwdriver).
  • The area around a magnet where the force of the magnet can act is called the ________________.
    repel
    magnetic field
    electromagnet
  • In CURRENT electricity, the negative charges have a continuous flow through a material.
    False
    True
  • When electric charges build up on the surface of an object, ___________ occurs.
    static electricity
    current electricity
    a circuit
  • An object that attracts certain metals is called ________________.
    a magnet
    a circuit
    an insulator
  • The invisible magnetic field can be observed by sprinkling ____________ around the magnet.
    iron fillings
    pieces of plastic
    bits of paper
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