Activity Preparation

• Locate an area outside of the school, preferably where an asphalt or concrete walkway is adjacent to a plot of grass. Note: If the ground is saturated due to recent rains or watering, the demonstration will not work correctly. Plan this demonstration for a day when water will soak into the ground.
• Fill watering cans with equal amounts of water to take outside.
• Review the included PowerPoint prior to using it as part of the lesson. It will provide students with information from #4 of the Discussion section.