Advanced Science Primary 4 Energy

Based on the table below, which material is most suitable for making the curtains of a bedroom to keep the room completely dark in the morning?

A Material W
B Material Y
C Material Z
D Material X
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Worked Solution

Step 1: To keep a room completely dark, the material must block all light. Step 2: A material that blocks all light is opaque. Step 3: Looking at the table, Material Z allows NO light to pass through.

Correct answer: Material Z

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