Woollen clothes keep us warm in winter mainly because

wool traps air, and air is a poor conductor of heatCorrect answerYour answerwool produces heat of its ownCorrect answerYour answerwool is a good conductor of heatCorrect answerYour answerwool absorbs heat from cold airCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer A

Correct answer: A

The fibres hold many small pockets of still air.
Air conducts heat poorly, so the body's heat escapes slowly.

Worth noting

Clothes do not make heat; they slow the loss of the body's own heat.

Concept: Insulation by trapped air
Typical timeTypical: 35 s
Your timeYours: —

The rule this testsHeat and temperature

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Woollen clothes keep us warm in winter mainly because

Explanation