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2.3 Transfer of thermal energy

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Question 169

A metal block, which has been cooled in a freezer, is placed on a table in a warm room.

What happens to the warm air that comes into contact with the cold surface of the block?

A

The density of the air decreases and the air rises.

B

The density of the air decreases and the air falls.

C

The density of the air increases and the air rises.

D

The density of the air increases and the air falls.

Markscheme

2.3 Transfer of thermal energy Questions

  1. IGCSE
  2. /Physics
  3. /2.3 Transfer of thermal energy

301 exam-style questions on CIE IGCSE Physics 2.3 Transfer of thermal energy, covering 2.3.1a Thermal conductors and thermal insulators, 2.3.1b Explaining thermal conduction, 2.3.2 Convection, 2.3.3a Thermal radiation, 2.3.3b Surface colour and texture, 2.3.3c Rate of emission and absorption of radiation, and 2.3.4 Consequences of thermal energy transfer. Each one has a worked solution and a mark scheme showing where the marks go.

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