Soap Collapses a Water Dome

The dome flattens and spills quickly. Ask students to predict what will happen. Touch a tiny amount of soap to the water dome. Key idea: Soap lowers the water's surface tension. Ask: What changed when the soap touched the surface? Safety and cleanup: Use tiny soap amount; wipe slippery drops. https://www.google.com/search?q=%22Soap%20Collapses%20a%20Water%20Dome%22%20science%20demonstration%20experiment