Give 4 methods of reducing heat loss from a home.

  1. Make walls from a material with low thermal conductivity.
  2. Use cavity walls.
  3. Use double glazed windows.
  4. Insulate walls and attic.


There are many more possible answers.

Answer in your head, out loud, or on paper, then tap the card to flip.

What is the purpose of putting insulation in the gap in cavity walls?

To minimise air convection currents.

Answer in your head, out loud, or on paper, then tap the card to flip.

How does the gap in a cavity wall help reduce heat loss?

Heat cannot be conducted across the gap, as the gap contains mostly air which does not conduct heat (remember that insulation is mostly made of air gaps).

Answer in your head, out loud, or on paper, then tap the card to flip.

What is the difference between a single glazed and double glazed window?

Single glazed windows only have one pane of glass, whereas double glazed windows have two panes of glass, with a small air gap between them.

Answer in your head, out loud, or on paper, then tap the card to flip.

What is the key benefit of double-glazed windows?

The air gap between the two panes minimises heat loss by conduction.

Answer in your head, out loud, or on paper, then tap the card to flip.

What is friction?

Friction is the resistance that an object encounters when moving over a solid, or moving through a liquid.

Answer in your head, out loud, or on paper, then tap the card to flip.

How could you reduce the friction between a bike chain and the bike cogs?

Add a lubricant, such as oil. 

Answer in your head, out loud, or on paper, then tap the card to flip.

Do double glazed windows have a higher or lower thermal conductivity than single glazed windows?

Double glazed windows have lower thermal conductivity, meaning less thermal energy transfers through them.

Answer in your head, out loud, or on paper, then tap the card to flip.