Electricity and Magnetism - Test Practice

What kind of electricity do you think should be used to power a new neighborhood that is being planned?

• Static electricity, because it is a constant flow of electricity.

• Static electricity, because it would be the easiest to control.

• Current electricity, because it is free.

• Current electricity, because it is easier to control.

Which item could be placed where the question mark is to complete the circuit?

• wax candle

• plastic marker

• steel screw

• fabric pillow

Which of these diagrams is a closed circuit?

• A

• B

• C

• D

Which of these is an example of human-harnessed electricity?

• lightning striking a tree

• accidentally shocking your cat when you touch her

• using a flashlight

• socks from the dryer sticking together

Abigail rubs two balloons on her wool sweater and lays them next to each other on her desk. What do you think will happen to the two balloons?

• They will stay laying close together but not touching.

• They will move toward each other and stick together.

• They will touch each other and then pop.

• They will push each other away.

Tags

NGSS.MS-PS2-3

NGSS.MS-PS2-5

Why would a circuit not work if one of the wires was replaced with a rubber band?

• Rubber is a conductor, so the electricity would flow through it.

• Rubber is an insulator, so the electricity would flow through it.

• Rubber is an insulator, so the electricity would not flow through it.

• Rubber is a conductor, so the electricity would flow through it.

Which of the following is ABSOLUTELY NECESSARY for a simple circuit to work? Check all that apply.

• power source

• conductor

• load

• switch

• circuit breaker

Which of the following objects do you predict would be good conductors of electricity? Check all that apply.

• book

• styrofoam

• paperclip

• Lego

• aluminum foil

Which of the following shows a complete circuit?

• 
• 
• 
• 

Why is the electromagnet on the left picking up more items?

• Because the nail must be a permanent magnet.

• Because there are more coils of wire around the nail.

• Because the battery on the right is not as strong.

• Because the circuit on the right is open.

Tags

NGSS.MS-PS2-3