STEMbite: Diffusion

A biology or physical science class would benefit from viewing this video on diffusion and molecular motion. Mr. Vanden Heuvel plays with food coloring in drinking glasses, showing that the faster the water molecules are moving due to their heat energy, the more quickly the color is distributed. Ideally you would follow this with a lab activity in which your class measures the temperatures of the water samples and records the time until the water is evenly colored.