Standard Science Primary 4 Energy

Ravi placed four rods made of different materials into a beaker of boiling water. A drop of wax was placed at the end of each rod. Which material will cause the wax to melt the FASTEST?

A Glass
B Wood
C Plastic
D Copper
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Worked Solution

Step 1: Wax melts when it gains enough heat from the rod. Step 2: The rod that conducts heat the fastest will melt the wax first. Step 3: Metals are better conductors of heat than non-metals. Step 4: Copper is a metal and an excellent conductor.

Correct answer: Copper

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