Energy Transfers In The House

Question 1

Loft insulation

Answer 1

Good insulation due to air pockets between fibre, reducing loss through conduction

Question 2

Cavity wall insulation

Answer 2

pumped into the air cavity between two layers of bricks. better insulation than air due to small pockets of air, reducing energy loss through conduction

Question 3

Aluminium foil

Answer 3

between radiator and reflects radiation back into the room, reducing energy loss through radiation

Question 4

Double glazed windows

Answer 4

air trapped (vacuum- no moving particles) two layers of glass reducing energy loss through conduction

Question 5

Thicker external walls

Answer 5

thicker bricks have lower thermal conductivity, reducing loss through conduction

Question 6

Photovoltaic cells

Answer 6

used to convert energy directly into electricity