Heat Transfer

Question 1

Conduction

Answer 1

Heat traveling through a conductor

Question 2

Convection Current

Answer 2

A current created by heat causing changes in the density of fluid

Question 3

Thermal Radiation (Infrared radiation)

Answer 3

Does not need a medium to travel through, so can pass through a vacuum.

Question 4

Best state of a material for conduction

Answer 4

1. Solid
2. Liquid
3. Gas

Question 5

How is a convection current made?

Answer 5

1. The heat source heats the (Water)
2. The hot (Water) expands, and becomes less dense. The less dense (Water) rises.
3. Cooler, more dense (Water) sinks to replace the warm (Water) causing a convection current.

Question 6

Shiny Materials & Thermal Radiation

Answer 6

Shiny objects reflect the heat.

Question 7

Colours and Thermal Radiation

Answer 7

Black is the best emitter and absorber of heat energy.

White is the worst.