Magnetism
What would happen if the north ends of two magnets were close together?
What is repel?
Socks taken from a clothes dryer that stick together or a lightning bolt in the sky are examples of ____________.
What is static electricity?
Is a circuit open or closed if you haven't turned on the switch?
What is open?
What is a material that lets electric current pass through?
What is a conductor?
True or False: An electromagnet is a permanent magnet.
What is False? An electromagnet can be turned on or off. Once the circuit is broken, the magnetism is lost.
If a south end of a magnet is close to a north end of a magnet, the magnets will _________.
What is attract?
True or False: Like charges attract and unlike charges repel.
What is False? Like charges repel and unlike charges attract.
What supplies current to an electrical circuit?
What is a battery (or other electrical source)?
What is a material that blocks an electric current from passing through?
What is an insulator?
True or False: An electric crane is an example of an electromagnet.
What is True?
True or False: All magnets have the same shape and size.
What is False?
If you rub your hair on a balloon and the balloon becomes negatively charged, what charge will your hair have?
What is a positive charge?
What part of a circuit does electrical energy change from one form to another?
What is a load (lightbulb)? This is where the energy changes to produce heat or light.
Which of these materials is not a conductor: copper, aluminum, gold, or wood?
What is wood?
True or False: A refrigerator magnet is a permanent magnet.
What is True? Even when you take it off the refrigerator, it is still magnetic.
True or False: All magnets have a north and south pole.
What is True?
Current electricity that is produced by passing magnets past coils of wire, including wind and water turbines.
What is human-harnessed electricity?
True or False: When you turn on a light, the switch is opening the circuit.
What is False? A switch closes the circuit to turn on the light.
Which of these materials is a conductor: rubber, glass, air, silver?
What is silver?
An electromagnet must be part of an electrical ______.
What is circuit?
Will a magnet attract copper, rubber, iron, or plastic?
What is iron?
Naturally-occurring electricity that occurs when there is a buildup of negative charges in one place.
What is static electricity?
An electrical circuit is made up of a connector (wire), a load (lightbulb), a switch, and a ____________.
What is a battery (or electrical source)?
True or False: Pure water is a conductor.
What is False? The salts and other materials in water are conductors though. So, don't mix water with an electrical circuit!!!!
An electromagnet is made up of what three items?
What is an iron bar (nail), battery, and a wire?