Various objects in our daily lives are attached to windows, refrigerators, bathroom walls, and other surfaces using suction cups. How does a suction cup work? A-The pressure from the atmosphere is greater than the pressure inside the suction cup. This difference causes the suction cup to be pressed against the surface it is attached to. B-Suction cups only work if they make use of some form of chemical adhesive. Air pressure alone cannot produce strong enough forces to hold a suction cup in place.     C- The air molecules inside a suction cup pull the suction cup toward the surface it is attached to, holding it in place.

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