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2.3 Transfer of thermal energy

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Question 54

Which option correctly describes how cooling changes the density of air, and identifies the method of energy transfer driven by this density change?

A

The density decreases, and the energy transfer method is conduction.

B

The density decreases, and the energy transfer method is convection.

C

The density increases, and the energy transfer method is conduction.

D

The density increases, and the energy transfer method is convection.

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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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