As the glass of water was placed in the freezer, the temperature of the water decreased, causing the thermal energy of the water molecules to drop. This reduction in thermal energy led to a decrease in the kinetic energy of the molecules, resulting in them moving more slowly. Eventually, the molecules lost enough energy to form rigid structures, causing the water to solidify into ice.
You fill a glass with room temperature water from the sink and then place it in the freezer. After a few hours, you take the glass out and the water is now a solid. In two to three sentences explain what happened to the water in the glass as the temperature decreased. Key words to include for full points: kinetic energy, thermal energy, temperature, and heat. (4 points)
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