A hiker feels cold while resting on a scale-climb and decides to put on a thick down-filled jacket.
Explain how the thick down-filled jacket helps to keep the hiker warm.
The hiker says: "I think that I can use a thin, shiny foil space blanket instead of the jacket to keep myself warm."
Do you agree with the hiker? Explain why.
36 exam-style questions on Edexcel IGCSE Physics Energy transfers. Each one has a worked solution and a mark scheme showing where the marks go.