Water and Pepper Experiment

Show your kids why washing your hands is important with the help of the water and pepper experiment. Watch the video for step by step instructions. Pepper is hydrophobic or doesn't dissolve or mix into water. Since water molecules are strongly attracted to each other, or have a high surface tension, it keeps the pepper afloat. Adding soap breaks down the surface tension and as the water molecules spread out away from the soap, they brings the pepper with them.