Standard Science Primary 4 Matter

Siti pushed the plunger of a syringe filled with air while covering the nozzle with her finger. She observed that the plunger moved in slightly. Which property of matter does this experiment demonstrate?

A Air has a definite volume.
B Air occupies space.
C Air can be compressed.
D Air has mass.
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Worked Solution

Step 1: Identify that the syringe is filled with air (a gas). Step [2-9]: The plunger moving in while the nozzle is sealed shows that the volume of air inside has decreased. Step [2-9]: This demonstrates that gases can be compressed.

Correct answer: Air can be compressed.

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