Energy Transfers and Efficiency

Question 1

What 3 things can energy be?

Answer 1

Transferred usefully, stored or dissipated

Question 2

What can’t energy be?

Answer 2

Created or destroyed

Question 3

Where is wasted energy transferred to? What do they become?

Answer 3

The surroundings- becoming warmer

Question 4

What happens to the wasted energy?

Answer 4

It becomes increasingly spread out, so becomes less useful

Question 5

When energy is transferred, how can it be described?

Answer 5

Part useful, the rest is wasted

Question 6

What’s payback time?

Answer 6

The time it takes for the amount of money you save to cover the amount you paid

Question 7

What type of heat transfer does cavity wall insulation stop?

Answer 7

Convection and radiation

Question 8

What type of heat transfer does loft insulation stop?

Answer 8

Conduction and radiation

Question 9

What type of heat transfer does draught-proofing stop?

Answer 9

Convection

Question 10

What type of heat transfer does a hot water tank jacket stop?

Answer 10

Conduction and radiation

Question 11

What type of heat transfer does thick curtains stop?

Answer 11

Conduction and radiation