Question

Section B: Structured Question
1. (a) A piece of kitchen aluminium foil is used to
wrap food to be cooked in a barbecue fire.
One side of the foil is shiny, while the other
side is dull. Which side should be on the
outside and why?
(b) Most houses in countries that experience
winter have air heaters installed. These
heaters are usually installed near the floor.
Explain why.
Section C: Free-Response Question​

Answer 1

Answer

A) the dull side should be used because there is an oxide layer of aluminium oxide due to rusting in air so it protects the future rusting so dull side should be used outside

B) hot air goes top and cold air comes down because hot air is lighter than cold air

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