Standard Science Primary 4 Energy

Stan noticed that the electrical wires between the poles along the road appeared to be sagging more on a very hot afternoon. This is because the wires __________.

A gained heat and expanded
B lost heat and contracted
C lost heat and expanded
D gained heat and contracted
Show Worked Solution

Worked Solution

Step 1: Identify the condition (hot afternoon). Step [2-9]: Recall that most materials expand when they gain heat. Step [2-9]: Expansion increases the length of the wires, causing them to sag lower.

Correct answer: gained heat and expanded

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