Insulating buildings

Which of the following materials have a HIGH THERMAL CONDUCTIVITY? Choose TWO correct answers.

• copper

• wool

• foam

• steel

Which of the following has a LOW THERMAL CONDUCTIVITY? Choose two correct answers.

• COPPER

• FIBREGLASS

• AIR

• STEEL

A duvet keeps you warm because the material inside contains pockets of

A 15 tog duvet keeps you warmer than a 4.5 tog duvet because the material inside is

A padded coat keeps you warm because the material inside

• has a high thermal conductivity

• has a low thermal conductivity

• is white

• is very thin

Insulators have a low thermal conductivity and transfer heat energy

Which statements about heat energy transfer is true? Choose TWO.

• Heat energy transfers from a colder place to to warmer place

• Heat energy transfers from a warmer place to a colder place.

• Heat energy transfers quicker if there is a big difference in temperature.

• Heat energy transfers slower if there is a big difference in temperature.

Which of the following is NOT a method of insulating our homes?

• cavity wall insulation

• loft insulation

• wearing a hat

• double glazed windows

Putting foil behind radiators reduces heat energy losses.

• True

• False

Ben paid £10 000 to have double glazed windows fitted in his home. He was told that he would save £125 each year on his energy bills. What is the PAYBACK TIME for Ben?

• £100

• £125

• £80

• £180