Standard Science Primary 4 Energy

Which of the following lists contains ONLY opaque objects?

A Frosted glass, clear plastic, tissue paper
B Clear glass, tracing paper, mirror
C Iron sheet, clear glass, wooden door
D Mirror, wooden door, iron sheet
Show Worked Solution

Worked Solution

Step 1: Opaque objects do not allow any light to pass through them. Step 2: Mirrors reflect light completely but do not let it pass through (opaque). Step 3: Wood and iron are also opaque.

Correct answer: Mirror, wooden door, iron sheet

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