Split the class into four teams. Have each team grab a handful of ice, place the ice in an empty beaker, and
measure out the mass of beaker of ice using a triple beam balance.
Carefully, have each team heat up the becker of ice over a hot plate until all the ice has changed into water.
Measure the mass and note and changes of the mass. Explain data findings.
Have the students heat up the water until it reaches boiling point - when the water begins to evaporate.
Carefully remove the beaker of boiling water and measure the mass. Explain data findings and make a hypothesis
of what is happening as the ice was being melted into water, and the water being boiled into vapor.
Repeat the entire activity except now in a CLOSED SYSTEM (place a lid on top of the beaker and have the
students measure out their results.) Students should be recoding their results and commenting on why in one case
the mass changes in the open system, and the mass does not deviate that much in the closed system.
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