Standard Science Primary 4 Matter

Siti tried to push the plunger of a syringe filled with substance X. She found that she could push the plunger in slightly. What is substance X likely to be?

A Sand
B Air
C Oil
D Water
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Worked Solution

Step 1: Identify the observation (plunger can be pushed in). Step 2: This means substance X can be compressed. Step 3: Only gases can be compressed as they have no definite volume. Step 4: Air is a gas.

Correct answer: Air

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