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2.3 Transfer of thermal energy

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Question 161

An electric heater is mounted on the wall near the floor of a room. The heater warms the surrounding air and releases it into the room.

What happens to the warm air released from the heater and why?

A

It falls because it is less dense than cold air.

B

It falls because it is more dense than cold air.

C

It rises because it is less dense than cold air.

D

It rises because it is more dense than cold air.

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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