Conductors Insulators and Simple Circuits

Why is electrical wiring usually covered with a layer of plastic?

• To help electricity flow along the wire

• To make it look pretty

• To avoid electrocution

• To reduce the amount of electricity that flow in the circuit

A material that prevents heat or an electric current from flowing

• Conductor

• Insulator

• Magnetism

• Electric Circuit

The above diagram shows an investigation to study a property of materials. After heating the rod at end A, the drawing pin at end B of the metal rod drops earlier than the glass rod. What conclusion can be drawn from this investigation?

• All materials conduct heat equally well.

• The metal rod can conduct electricity.

• The metal rod is a better conductor of heat than a glass rod.

• The metal rod is a better insulator of heat.

Tags

NGSS.MS-PS3-3

Substance X is a non-metal but it can conduct electricity. Substance X is ________________.

• plastic

• wood

• carbon

• glass

Tags

NGSS.MS-PS2-3

True or False: An insulator is a type of material that allows heat to escape from an object quickly.

• True

• False

Tags

NGSS.MS-PS3-3

Which is NOT an insulator.

• Wool

• Plastic

• Iron

• Glass

Tags

NGSS.MS-PS3-3

Which of the following is a good conductor of heat and electricity?

• newspaper

• copper wire

• glass plate

• plastic bottle

Tags

NGSS.MS-PS2-3

This girl is wearing pink wool earmuffs to keep her ears warm in the snowy weather. Differentiate between conductors and insulators. How does the wool affect heat transfer? (wool is a type of fabric)

• The wool is a conductor that transfers heat from her ears to the wool earmuffs.

• The wool is an insulator that provides heat to keep the girl's ears warm.

• The wool is a conductor that transfers heat from the girl's earmuffs to her ears.

• The wool is an insulator that keep the girl's ears from loosing heat.

An insulator does not allow electricity to pass through it easily. Which of the following would make a good insulator?

• copper penny

• iron nail

• metal doorknob

• rubber glove

Styrofoam is an example of _____

• a conductor

• an insulator