Circuits and Electricity

A conductor is a material which allows electricity to flow through it.

• True

• False

All metals are conductors of electricity

• True

• False

Here is a list of some materials.

Copper

Glass

Sand

Iron

Paper

Wood

Plastic

Which of these materials will conduct electricity?

• Copper and sand

• Iron and wood

• Paper and plastic

• Copper and iron

Here are diagrams of four electric circuits.

How many of these circuits will NOT work?

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS2-3

Choose the best word to complete the following sentence.

Graphite is a good electrical................................................

• Metal

• Conductor

• Insulator

• solid

Tags

NGSS.MS-PS2-3

Here is a diagram of an electric cable. Electric cables contain wires. The materials labelled A and B are made of plastic. Plastic is used to cover the wires because,

• Plastic is flexible and a good conductor

• Plastic is inflexible and a good insulator

• Plastic is flexible and a good insulator

• the material is not plastic but actually rubber.

Alizhan has come back from football practice. He is feeling very hot and has been sweating a lot, so he want to plug in a cooling fan to help him recover. Before he plugs in the fan he is advised to dry his hands because....

• The fan is heavy and it could slip out of his hands.

• Electricity from the socket could travel in the sweat and give him an electric shock.

• His sweat could get on the plug and stop the fan from working.

• His sister tells him he is gross and she does not want his sweat on the fan.

Elif sets up a circuit, as shown in the diagram, to test different materials to see if they can carry electricity. After each test she opens the switch and then changes the test material. Why does she open the circuit each time?

• So that she does not give herself an electric shock.

• So that she does not break the battery

• So that she does not break the light bulb

• So that she can complete the circuit.

Etka set up the electrical circuit as shown in the diagram. The equipment he used to set up this circuit are...

• Battery, conductor, lightbulb, ammeter, motor, switch

• Battery conductor, voltmeter motor, switch.

• Battery, conductor, ammeter, buzzer, switch

• Battery, conductor, voltmeter, buzzer, switch

Tags

NGSS.MS-ETS1-1

Elif tested several materials to see which would be the best conductor of electricity. Which of these materials would be the best conductor of electricity?

• Graphite

• Silver

• iron

• Copper

Tags

NGSS.MS-ETS1-2