Standard Science Primary 4 Energy

Ravi placed identical cubes of wax on the ends of four rods made of different materials: copper, glass, plastic, and iron. He heated the other ends of the rods. On which rod will the wax melt the FASTEST?

A Plastic
B Glass
C Copper
D Iron
Show Worked Solution

Worked Solution

Step 1: Compare the thermal conductivity of materials. Step 2: Copper is the best conductor of heat among the list. Step 3: Heat travels fastest through copper to melt the wax.

Correct answer: Copper

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