Standard Science Primary 4 Energy

Four rods made of different materials were placed in a beaker of boiling water. A drop of wax was placed on the end of each rod. On which rod would the wax melt the FASTEST?

A Glass rod
B Wooden rod
C Copper rod
D Plastic rod
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Worked Solution

Step 1: Heat travels from the boiling water through the rod to the wax. Step 2: Metals are good conductors of heat and transfer heat faster than non-metals. Step 3: Copper is a metal, so the wax on it melts first.

Correct answer: Copper rod

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