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.

As the glass of water was placed in the freezer, the temperature of the water decreased, causing its thermal energy to drop. The decrease in temperature resulted in a reduction of the water molecules' kinetic energy, which slowed their movement. Eventually, as the temperature continued to fall, the water froze into a solid as the molecules reached a state where they were tightly bound in a structured arrangement.