Electricity and Magnetism Unit Review

Electricity - Which of the following describes electrical charges?

• Like charges attract. Unlike charges repel.

• Like charges attract. Unlike charges attract.

• Like charges repel. Unlike charges attract.

• Like charges repel. Unlike charges repel.

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NGSS.MS-PS2-3

NGSS.MS-PS2-5

Electricity - Which of the following is an example of static electricity?

• A magnet attracting paperclips.

• Ice sticking to a car's windshield on a cold day.

• Glue holding two pieces of paper together.

• socks from a dryer sticking together.

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NGSS.MS-PS2-5

Circuits - What is the purpose of a wire in an electrical circuit?

• to conduct electricity

• to provide the power for the circuit

• to allow the circuit to be opened or closed

• to transform the electricity into a different type of energy

Circuits - A circuit contains a battery, a wire, a switch, and a bulb. What would happen if you removed the battery?

• The current would flow faster

• The bulb would glow less brightly

• The current would not flow

• The bulb would glow more brightly

Conductors & Insulators - Which of the following materials are the BEST insulators.

• steel paperclip

• iron nail

• plastic block

• copper wire

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NGSS.MS-PS3-3

Electromagnet - Which MUST be included in an electromagnet.

• light bulb

• electric current

• motor

• switch

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NGSS.MS-PS2-3

Conductors and Insulators - Which of these materials can BEST conduct an electric current?

• cloth

• rubber

• sand

• gold

Electricity - A girl rubs a balloon against her hair. The balloon then has a negative charge. The girls hair....

• was uncharged before but now has a negative charge.

• was uncharged before but now has a positive charge.

• had a positive charge before but now is uncharged.

• had a negative charge before but now is uncharged.

Electromagnets - An electromagnet can be used in a motor but a bar magnet cannot. This is MOSTLY because the electromagnet....

• can be turned on and off

• will attract all metal objects

• is strongest near its ends

• has magnetic poles.

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NGSS.MS-PS2-3

Magnetism - Which is true about an electromagnet AND a bar magnet?

• They both have a current in a wire

• They both are attached to a battery.

• They both have a north and a south pole

• They both can be turned on and off