EnergyAQA GCSE Physics (8463)

Conservation and Dissipation of Energy

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

Practice progress

6 MCQs

0 of 6 attempted

Correct

Incorrect

Remaining

1
Which is NOT one of AQA's three named methods to reduce unwanted energy transfers?
Answer & explanation
Correct: option D
Refrigeration is not on the spec list. The three are lubrication, streamlining and (thermal) insulation.
2
When a moving car brakes to a stop, where does most of its kinetic energy end up?
Answer & explanation
Correct: option B
Friction at the brake discs converts kinetic energy into the thermal store of the discs (and a smaller amount into the tyres and road).
3
Why is trapped air a good thermal insulator?
Answer & explanation
Correct: option B
Air conducts heat poorly (0.025 W/m·K), and trapping it stops convection currents that would otherwise carry heat away.
4
In RP2, which is a suitable control variable?
Answer & explanation
Correct: option B
Volume of water must be kept the same so heat loss rates can be fairly compared. Material is the independent variable; temperature is the dependent variable.
5
Doubling the thickness of loft insulation roughly:
Answer & explanation
Correct: option B
Rate of conduction is roughly inversely proportional to thickness — double the thickness, halve the rate of energy loss.
6
Streamlining reduces:
Answer & explanation
Correct: option B
Streamlining shapes a body to reduce air (or water) resistance.

EnergyAQA GCSE Physics (8463)

Work through the notes, try the practice questions, then take the quiz. The report tells you exactly what to revise next. (2026)

6 MCQs

0 of 6 attempted

Correct

Incorrect

Remaining

1
Which is NOT one of AQA's three named methods to reduce unwanted energy transfers?
Answer & explanation
Correct: option D
Refrigeration is not on the spec list. The three are lubrication, streamlining and (thermal) insulation.
2
When a moving car brakes to a stop, where does most of its kinetic energy end up?
Answer & explanation
Correct: option B
Friction at the brake discs converts kinetic energy into the thermal store of the discs (and a smaller amount into the tyres and road).
3
Why is trapped air a good thermal insulator?
Answer & explanation
Correct: option B
Air conducts heat poorly (0.025 W/m·K), and trapping it stops convection currents that would otherwise carry heat away.
4
In RP2, which is a suitable control variable?
Answer & explanation
Correct: option B
Volume of water must be kept the same so heat loss rates can be fairly compared. Material is the independent variable; temperature is the dependent variable.
5
Doubling the thickness of loft insulation roughly:
Answer & explanation
Correct: option B
Rate of conduction is roughly inversely proportional to thickness — double the thickness, halve the rate of energy loss.
6
Streamlining reduces:
Answer & explanation
Correct: option B
Streamlining shapes a body to reduce air (or water) resistance.