Siti trapped some air in a syringe and covered the nozzle with her finger. She found that she could push the plunger in slightly. This shows that air __________.
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Worked Solution
Step 1: Identify that the syringe is sealed.
Step 2: The plunger moving in means the volume of air decreased.
Step 3: Only gases (air) can have their volume reduced under pressure. This is called compression.
Correct answer: can be compressed
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