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2.3.4 Consequences of thermal energy transfer

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Question 5

A scientist is explaining why a down jacket (insulated with goose down) is so effective at keeping a person warm in cold weather. The down insulation consists of fluffy feathers that trap a large amount of air in tiny pockets.

Three statements are made to explain this:

  1. The trapped air is a poor thermal conductor.
  2. Convection is minimized because the air is trapped in very small pockets and cannot move easily.
  3. The feather material itself is a poor thermal conductor.

Which statements are correct?

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

2 and 3 only

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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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