Make wadded-up newspaper balls and place them at one end of the tray for hills and mountains. 2.Cover the tray with the sheet of aluminum foil. Gently press on the aluminum foil to cover the mountains and make valleys between the mountains. Shape the foil to form a bay at the lower end of the tray. Poke small holes in the bottom of a paper cup with a pencil point and place it inside another paper cup.
Half fill the cup with water.
Describe how the water moves in the model watershed. Now sprinkle a small amount of Kool-Aid over the watershed. The Kool-Aid will represent soil nutrients and other runoff. Make it rain again. Sprinkle with Kool-Aid again and make it rain.