Heat Transfer

Question 1

Thermal radiation

Answer 1

All objects emit and absorb thermal radiation

Hot objects emit more than they absorb

Question 2

Conduction

Answer 2

Happens in solids

Conduction of heat is the process where vibrating particles pass on their extra kinetic energy to neighbouring particles

Question 3

Convection

Answer 3

Involves liquids and gases only

Convection occurs when the more energetic particles move from hotter region to the cooler regions and take their heat energy with them

Remember this use word expand and as the hot water Rises it displaces the colder water out of the way making it sink towards the heater coil

Question 4

Insulating your house

Answer 4

Loft insulation conduction convection

Double glazing conduction and convection

Cavity wall insulation convection radiation conduction

Thick curtains convection conduction and radiation