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2.3.4 Consequences of thermal energy transfer

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Question 19

In cold weather, birds fluff up their feathers to help themselves stay warm.

How does fluffing up feathers help a bird to stay warm?

A

Air can circulate easily between the feathers and warm up the skin by convection.

B

Air trapped between the feathers reduces heat losses from the skin by convection.

C

The feathers conduct heat to the skin from the cold air outside.

D

The feathers are good conductors of heat, so they conduct heat away more slowly.

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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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