Insulation

Question 1

What is insulation?

Answer 1

Insulation is a process used to avoid unwanted heat transfer into the surroundings.

Question 2

How does evaporation reduce heat transfer?

Answer 2

When a liquid evaporates, its thermal energy is transferred into the surroundings. The evaporated particles take lots of energy with them and so the remaining liquid cools down.

Question 3

What are some features of an insulator?

Answer 3

• made out of non-metallic materials e.g. glass, plastic, wood
• durable and resistant
• don’t allow heat and electricity to pass through them easily