Pepper Runs from Soap

Pepper races away from the soap. Ask students to predict what will happen. Sprinkle pepper on water and touch soap to the center. Key idea: Soap lowers surface tension locally and the surface pulls away. Ask: Is the soap touching every piece of pepper? Safety and cleanup: Wipe slippery spills. https://www.youtube.com/watch?v=N6PjqB77rQc