Materials

Which of the following is an electrical insulator?

• Gold

• Rubber

• Aluminum

• Copper

Answer explanation

In these materials, the insulator (which does not allow current to flow) is rubber (rubber).

Which of the following is an electrical conductor?

• Dry wood

• Plastic

• Sliver

• Glass

Answer explanation

In these materials, the conductor (for the current to flow through) is silver (silver).

A material which is NOT an electrical insulator _______.

• does not allow electricity to pass through it easily

• does not allow heat to travel through it easily

• allows heat to travel through it easily

• allows electricity to pass through it easily

Answer explanation

A material that is not an electrical insulator is a material that conducts electricity (allows electric current to flow easily).

Rubber is a good ________ material but plastic is not.

• elastic

• flexible

• breathable

• insulating

Which could not be a natural fiber?

• Nylon

• Cotton

• Linen

• Silk

What is a property of cotton cloth?

• Breathable

• Simmering

• Conductive

• Strong

Nylon

What do you think about your country ? Is it polluted or beautiful ?

Do you think your country will be polluted ?

• Yes

• No

• I don't know

• ...

What country do you live ?