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2.3 Transfer of thermal energy

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Question 151

A portion of air near the ceiling of a room is cooled by an air conditioning unit.

Which row describes the change in the density of this cooled air and the primary form of thermal energy transfer that occurs as a result of this change?

A

Density increases; conduction

B

Density increases; convection

C

Density decreases; conduction

D

Density decreases; convection

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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