1. The Collapsing Can Experiment.
*This builds upon the Marshmallow Madness experiment with pressure.
Materials: Aluminum soda can, Ice Water, Measuring Cup, Hot Plate-to heat up soda can, Tongs /oven mitt, Clear (glass) container to hold ice water, with a flat bottom, safety goggles
Procedure:
•Fill a bowl with cold water (adding ice would help).
•Put about 2 tablespoons of water in an empty soda can
•Heat the soda can on a hotplate.
•Place can up-right on stove and heat until steam is seen escaping from the mouth of can.
•Then quickly move the can over the bowl of cold water, and quickly invert it. Lowering it so that the top lip of the soda can (pointing down) just barely gets submerged underwater all the way around.
•Wait a few seconds. The soda can should quickly crumple in on itself. If it doesn’t, try the experiment again, something went wrong. (Usually either the water in the can was not boiling hard enough, or the can was submerged too much or too little.)
In Journals: Students need to try to explain and diagram what they think happened.
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