Keeping homes warm

How does double glazing reduce energy loss?

The gap between the two pieces of glass is filled with a gas or contains a vacuum. How does this reduce energy loss by conduction?

How does loft insulation reduce energy loss?

How does loft insulation reduce energy loss by conduction and convection?

What can happen without loft insulation?

How will hot air rise into the loft only?

How does cavity wall insulation reduce energy loss?

How does cavity wall insulation reduce energy loss by conduction and convection?

Why do insulation blocks that are used to build new homes have shiny foil on both sides?

How do the insulation blocks that are used to build new homes which have shiny foil on both sides reduce energy transfer by radiation?

Name the three ways in which energy can be transferred.

How is energy transferred by conduction?

How is energy transferred by convection?

What is the unit of density?

What is the equation for density?

How is energy transferred by radiation?

How can you calculate energy efficiency?

How can energy transformations be shown?

Draw an example of a Sankey diagram for a light bulb when the total energy input is 100J, 75J is useful energy output and 25J is energy lost to the environment.

Fill in the gaps:
Energy from the ...... (....) is lost to the .... (...........).

Different amounts of insulation cost different amounts and save different amounts of energy. Write the equation for payback time.

Fill in the gaps:
Everything that transfers ...... will ..... some of that energy as .... to the .............

Buildings that are well insulated and where little energy is lost to the surroundings are what?

Designers and architects have to make sure that.........