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2.3 Transfer of thermal energy

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Question 205

Why is the cooling compartment of a domestic refrigerator usually placed at the top of the cabinet?

A

Cold air is less dense than warm air and therefore sinks.

B

Cold air is more dense than warm air and therefore sinks.

C

Warm air is less dense than cold air and therefore sinks.

D

Warm air is more dense than cold air and therefore rises.

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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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