Standard Science Primary 4 Energy

Which of the following is the best material for a winter jacket to keep a person warm?

A Wool
B Aluminum
C Copper
D Iron
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Worked Solution

Step 1: To stay warm, you need to reduce heat loss from the body to the cold air. Step 2: This requires a poor conductor (insulator). Step 3: Wool traps air (a poor conductor) and is a better insulator than any of the metals listed.

Correct answer: Wool

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