| Water as a Solid | Water as a Liquid |
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| And Water as a Gas | |
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| Measure the Temperature of a beaker of ice water, each minute, for 20 minutes! | |
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| Don't watch the beaker or it will never boil! | |
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| Hey, with ice in the beaker, it's not heating up? | While it is boiling it's not heating up either? |
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| During the two phase changes where was all of the energy going if the water was not getting hotter? | |
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| Phase Changes take ENERGY! | |