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2.3 Transfer of thermal energy

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Question 172

Which statement about thermal energy transfer processes is correct?

A

Thermal energy transfer by radiation requires a material medium to propagate.

B

In convection, hotter parts of a fluid sink because they become more dense.

C

Metals are good thermal conductors because their free electrons can rapidly transfer energy.

D

Conduction is the main mechanism of heat transfer through gases.

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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