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2.3 Transfer of thermal energy

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Question 64

Which statement about convection is not correct?

A

Convection currents can only occur in fluids (liquids and gases) because their particles are free to move.

B

As a liquid is heated, its volume increases, which decreases its density.

C

Convection is the primary mechanism of heat transfer through solid metal rods.

D

Convection cannot occur in a vacuum because there are no particles to transport heat.

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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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