You Can Reduce the Rate of Energy Transfer

Question 1

What do all objects have?

Answer 1

A thermal conductivity

Question 2

What does thermal conductivity describe?

Answer 2

How well an object transfers energy by conduction

Question 3

Materials with a …… …….. ……… transfer energy between their particles quickly

Answer 3

High thermal conductivity

Question 4

How do you reduce energy transfers away from a system by conduction?

Answer 4

Use materials with low thermal conductivity

Question 5

How do you reduce convection?

Answer 5

You need to stop the fluid moving, and prevent convection currents from forming

Question 6

How does insulation such as clothes, blankets and foam cavity wall insulation work?

Answer 6

By trapping pockets of air

Question 7

Which is better at absorbing / emitting radiation: white or black surface?

Answer 7

Black

Question 8

How do you reduce the energy transfers away from an object by thermal energy?

Answer 8

The object should be designed with a surface that is a poor emitter