Standard Science Primary 5 Systems

Study the table below showing the properties of three materials. Which material(s) can be used to make the outer covering of an electrical wire?

A Material Y only
B Material X and Z
C Material Y and Z
D Material X only
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Worked Solution

Step 1: The outer covering of a wire must be an electrical insulator to prevent shocks. Step 2: It must also be flexible so the wire can be bent and routed easily. Step 3: Check the table: Material Y is a non-conductor (insulator) and is flexible.

Correct answer: Material Y only

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