Plop! Kenny dropped candies with a colorful sugared coating into a dish of water. Minutes later, the candy colors were spreading out at the bottom of the dish. Why would that happen? Think of your best answer, then read our explanation below.
As the sugared coating dissolves in the water, its sugar and dye molecules mix with neighboring water molecules. The sugar-water mixture is denser (heavier) than the rest of the water, so it sinks to the bottom of the dish, below the "pure" water. (In time, the sugar and dye will diffuse, or spread out, through all the water.)
By: Loralee Leavitt
Photo by: Guy Cali Associates, Inc.