Conductors and Insulators

Which is NOT an insulator?

• Styrofoam

• Plastic

• Iron

• Glass

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

• newspaper

• copper wire

• glass plate

• plastic bottle

Which is TRUE about an insulator?

• It can be a good conductor.

• It allows heat to pass through easily.

• It slows energy transfer.

• It provides heat to keep materials warm.

The electrical wires in many homes are made of copper and covered with plastic. Why are copper and plastic good choices for electrical wires?

• Copper is a conductor of electricity, and plastic is an insulator of electricity.

• Copper is an insulator of electricity, and plastic is a conductor of electricity.

• Copper is a conductor of electricity, and plastic is an insulator of heat.

• Copper is an insulator of electricity, and plastic is a conductor of heat.

The handle of a frying pan is often coated in rubber because rubber provides...

• Heat insulation
• Heat conduction
• A low melting point
• A nonstick surface

The best insulators are

• Plastic, rubber, wood, glass

• Silver, air, paper, silicon

• Copper, aluminium, gold, steel

• Ceramic, fabric, paper clip, cork

Why are the poles of a power line in our street made of wood?

• Wood is a conductor- they stop electrical current from the power lines hitting the ground

• So that during thunderstorms in winter, there isn't as much electrical current in the power line

• Because electrons can move faster through wood compared to any other material

• Wood is an insulator- they stop electrical current from the power lines hitting the ground

Why are metals useful for making electrical wire?

• Metals do not bend.
• Metals hold much heat.
• Metals are insulators.
• Metals are conductors.

Mittens help keep your hands warm in winter because

• they are colorful
• they are fuzzy
• they are conductors
• they are insulators

What is NOT an example of an insulator in the kitchen?

• an oven mitten

• pots and pans

• wooden spoons

• a measuring cup made of plastic