Reducing Energy Loss (KS3/4)

"Explain and investigate different methods of reducing heat transfer": When insulating a house, what methods can be used to keep in the heat?

"To be able to recall a definition for dissipation": What does dissipation mean?

• Dissipation is a term that is used to describe ways in which energy is wasted.

• Dissipation is a term that is used to describe ways in which energy is stored.

• Dissipation is a term that is used to describe ways in which energy is transferred.

"Identify the different methods of energy transfer": What form of energy transfer is happening in the water of the boiling kettle?

• Conduction

• Radiation

• Convection

"Identify the different methods of energy transfer": What form of energy transfer is happening from the sun to the earth?

• Conduction

• Radiation

• Convection

"Identify the different methods of energy transfer": What form of energy transfer is happening from the stove to the pan?

• Conduction

• Radiation

• Convection

What makes these insulation methods (such as cavity wall insulation, loft insulation and double glazing) ideal for reducing energy transfer?

• Air gaps that are present in these methods limit energy transfer.

• The materials used to insulate produce their own heat.

• These insulation methods do not have any particles.

How can we reduce energy that is being wasted?

Sometimes, we want heat to move effectively from one place to another.

Give one example of a conductor, and explain why you would want to increase energy (heat) loss in this case.

In other situations, we want to prevent heat transfer.

Give one example of an insulator, and explain why you would want to prevent energy (heat) loss in this case.

Which method of energy transfer does not make use of particles?

• Convection

• Conduction

• Radiation