Standard Science Primary 4 Matter

Siti trapped some air in a syringe and sealed the nozzle. She found that she could push the plunger in slightly. This shows that air __________.

A has no mass
B can be compressed
C has a fixed volume
D takes up space
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Worked Solution

Step 1: The nozzle is sealed, so no air escapes. Step 2: The plunger moves in, meaning the space the air occupies decreases. Step 3: This ability to decrease volume under pressure is called compressibility.

Correct answer: can be compressed

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