Electrical Conductors and Insulators

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.

These are examples of

• Insulators

• Conductors

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______________ are materials that RESIST the flow of heat or thermal energy.

• Conductors

• Insulators

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What is a insulator?

• a material that slows the transfer of heat

• a material that transfers heat easily

• a material that is fluffy

• a material that is temperature controlled

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Rubber is a insulator of electric energy

• true

• false

Why is electrical wiring usually made from copper?

• Because copper is shiny

• Because copper conducts electricity

• Because copper is not magnetic

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

• newspaper

• copper wire

• glass plate

• plastic bottle

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These are examples of

• Conductors

• Insulators

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

• True

• False

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Mittens help keep your hands warm in winter because

• they are colorful

• they are fuzzy

• they are conductors

• they are insulators

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