Magnet and Electricity Study Guide

Match the following definitions

• conductor

• the buildup of charges on an object

• resistance

• an object that does not conduct electricity

• insulator

• an object that allows electricity to flow

• static electricity

• the measure of how much a material opposes the flow of electricity

Match the following definitions

• parallel circuits

• a circuit that has two or more paths that electricity can follow

• series circuit

• a circuit that has only one path that electricity can follow

• electromagnet

• a temporary magnet made up of a wire wrapped around a core

What is a property of matter that causes objects to attract or repel each other?

• compass

• electric charge

• electric circuit

• electric field

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Which is a characteristic of most electrical conductors?

• They can be cut easily

• Positive charges move easily through them

• They are soft and flexible

• Negative charges move easily through them

Which statement is TRUE about an electromagnet?

• It is a permanent magnet

• Increasing the number of coils decreases its strength

• It cannot be turned off.

• It is made by wrapping current-carrying wire around an iron core.

Which of these materials makes a good insulator of electricity

• plastics

• aluminum foil

• salt water

• silver

If one burned out bulb causes all of the lights to fail in a circuit, what might you conclude

• It is a parallel circuit.

• More batteries are needed.

• It is a series circuit.

• A heavier wire is needed.

Two charged objects attract each other. Which statement is true?

• neither is positive

• they have the same charge

• neither is negative

• they have opposite charges

Which of the following materials would you use to connect a battery and bulb so that the bulb would light?

• a wooden toothpick

• a strip of silver

• a rubber band

• a strip of plastic

How are copper wire and aluminum foil alike?

• Negative charges can move through them easily.

• They are both silver-colored metals.

• They are both used to insulate wires.

• Negative charges can’t move through them.