Question

9. A principal wants to replace the playground equipment after several students complained of suffering burns on a hot day. The table provides information on several material options. Which material should the principal choose to prevent future burns?
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1 point
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A. Wood because it is the least dense.
B. Stainless steel because it has the greatest density.
C. Plastic because it has the lowest thermal conductivity.
D. Aluminum because it has the greatest thermal conductivity.

Answer 1

C. Plastic — because a low thermal conductivity means the material transfers heat to skin more slowly, reducing the chance of burns. Density is not the key factor, and aluminum (high conductivity) would make burns more likely.