Magnetism
Static Electricity
Circuit
Conductors and Insulators
Electromagnets

100

What would happen if the north ends of two magnets were close together?
repel

100

Socks taken from a clothes dryer that stick together is an example of ____________.
static electricity

100

Is a circuit open or closed if you haven't turned on the switch?
open

100

What is a material that lets electric current pass through?
a conductor

100

True or False: An electromagnet is a permanent magnet.
False. An electromagnet can be turned on or off. Once the circuit is broken, the magnetism is lost.

200

If a south end of a magnet is close to a north end of a magnet, the magnets will _________.
attract

200

True or False: Like charges attract and unlike charges repel.
False. Like charges repel and unlike charges attract.

200

What supplies current to an electrical circuit?
a battery (or other electrical source)

200

What is a material that blocks an electric current from passing through?
an insulator

200

True or False: An electric crane is an example of an electromagnet.
True

300

True or False: All magnets have the same shape and size.
False

300

If you rub your hair on a balloon and the balloon becomes negatively charged, what charge will your hair have?
a positive charge

300

What part of a circuit does electrical energy change from one form to another?
a load (example: lightbulb) This is where the energy changes to produce heat or light.

300

Which of these materials is not a conductor: copper, aluminum, gold, or wood?
wood

300

True or False: A refrigerator magnet is a permanent magnet.
True. Even when you take it off the refrigerator, it is still magnetic.

400

True or False: All magnets have a north and south pole.
True

400

True or False: Positive charges move from one object to another.
False. Only electrons (negative charge) move from one object to another.

400

True or False: When you turn on a light, the switch is opening the circuit.
False. A switch closes the circuit to turn on the light.

400

Which of these materials is a conductor: rubber, glass, air, silver?
silver

400

An electromagnet must be part of an electrical ______.
circuit

500

Will a magnet attract copper, rubber, iron, or plastic?
iron

500

True or False: A lightning bolt occurs when static electricity is created in the sky.
True

500

An electrical circuit is made up of a connector (wire), a load (lightbulb), a switch, and a ____________.
a battery (or electrical source)

500

True or False: Pure water is a conductor.
False. The salts and other materials in water are conductors though. So, don't mix water with an electrical circuit!!!!

500

An electromagnet is made up of what three items?
an iron bar (nail), battery, and a wire