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2.3.4 Consequences of thermal energy transfer

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Question 2

In winter, birds often puff up their feathers to stay warm. How does puffing up their feathers help a bird to reduce heat loss?

A

Air can circulate more freely between the feathers and heat up the skin by convection.

B

Air trapped by the feathers reduces heat loss from the skin by preventing convection currents.

C

The puffed-up feathers increase the rate of heat conduction away from the skin.

D

The feathers conduct heat energy from the cold surrounding air to the warmer skin.

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2.3.4 Consequences of thermal energy transfer Questions

  1. IGCSE
  2. /Physics
  3. /2.3.4 Consequences of thermal energy transfer

62 exam-style questions on CIE IGCSE Physics 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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