LateralRiddle #1408
Jen's sealed bag of chips was flat when she boarded the plane. Halfway through the flight it was puffed up like a pillow. Nobody touched it. Why?
Hint: The bag didn't change; the air around it did.
Answer
Cabin air pressure is lower at cruising altitude, so the air inside the bag expanded.
Planes are pressurized to about the level of a high mountain, so sealed bags swell.
Did you get it?
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