Pearson Edexcel International GCSE (9–1) · PHYSICS · Chapter
Energy Transfers
18 practice questions
Practice questions
1–8 of 8 · Easy
Question 1
1 mark · Easy
Answer and see the solution →State the main energy store in a stretched elastic band.
Question 2
1 mark · Easy
Answer and check →Which device transfers chemical energy directly to movement energy?
- A.A battery-powered torch
- B.A compressed spring toy car
- C.A solar panel
- D.A microphone
Question 3
1 mark · Easy
Answer and see the solution →State the principle of conservation of energy.
Question 4
2 marks · Easy
Answer and see the solution →A kettle transfers 320 kJ of energy to water, and 40 kJ is wasted as heat to the air. Calculate the efficiency of the kettle. Give your answer as a percentage.
Question 5
3 marks · Easy
Answer and see the solution →A student rubs their hands together on a cold day.
(a)[1 mark]Describe the main energy transfer that occurs while rubbing hands.
(b)[1 mark]Which energy store increases as the hands become warmer?
(c)[1 mark]Explain why rubbing hands is not 100% efficient.
Question 6
1 mark · Easy
Answer and check →Which method of thermal energy transfer mostly explains why the handle of a metal spoon becomes hot when placed in hot soup?
- A.Conduction
- B.Convection
- C.Radiation
- D.Insulation
Question 7
3 marks · Easy
Answer and see the solution →Describe a simple experiment you could carry out to show that air is a poor conductor of heat. Include the setup and an observation you would make.
Question 8
3 marks · Easy
Answer and see the solution →A student is asked to explain how a woolly jumper helps to keep you warm on a cold day.
(a)[1 mark]Name the process by which heat would escape without a jumper.
(b)[1 mark]Describe how the wool reduces heat loss.
(c)[1 mark]Name another common household use of a similar insulating principle.