Sara tries to push the plunger of a syringe filled with air while covering the nozzle with her finger. She finds she can push it in slightly. This shows that air __________.
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Worked Solution
Step 1: The nozzle is sealed, so no air escapes.
Step 2: The plunger moves, meaning the space air occupies has decreased.
Step 3: This ability to decrease volume under pressure is called compressibility.
Correct answer: can be compressed
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