I have narrowed down my lesson plans to the one that I will be conducting at the water fair at JJK. This is to understand infiltration and run-off.
Students will be provided with 3 cups. Cup A will contain clean water. The water will be poured into Cup B. Cup B will contain soil on top and one other object at the bottom (such as leaves, tin foil, wood chips, etc). Cup B and the object will both contain a hole. The water that is poured into Cup B from Cup A will run into Cup C. The students will observe the amount of water in Cup C and the color of the water in Cup C.
First, we will demonstrate the experiment with Cup B, which contains only soil at the bottom and requires two scoops of soil. Then we will fill Cup A a third to halfway with water. Then, dump the water from Cup A into Cup B. Then, observe what comes out of the bottom into Cup C. The water that comes out is called run-off. This ultimately flows into Cup C. Discuss the amount and color of the water with the students. Observe the amount and color of the water. Now, you will redo the experiment, but place different objects at the bottom of your Cup B that will act as obstructions, such as tinfoil or a sponge. What do we predict will happen, and then observe the runoff?
Then we all come together and discuss our observations and results regarding which object had the most and least run-off, and which run-off was the darkest. This shows how water moves through a system and changes along the way. How different objects affect the amount of water and the quality of water in a system, and if water can’t be taken into the soil, it can go through various routes of the water cycle.