water is a kind of substance & as the temperature of a substance decreases , the molecules in that substance will move slower / closer ->  as the temperature of water decreases, the molecules in water will move slower  as the temperature of water decreases, the molecules in water will move slower & the motion of liquid water molecules slows ->  the temperature of water is decreasing  the temperature of water is decreasing & temperature is a measure of heat energy ->  the heat energy of water is decreasing  the heat energy of water is decreasing & freezing means a substance changes from a liquid into a solid by decreasing heat energy & water is a kind of substance -> the water will freeze and change from a liquid to a solid