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1. a few books
2. two shallow pans
3. a deeper pan
5. soil with grass growing in it
6. water in a container
Step 1: Gather all your materials listed above. Then prop up the end of the shallow pan on the books. Put the other end of the shallow pan in the deeper pan. Fill the shallow pan with soil up to the rim.
Step 2: Carefully pour the water from the top end of the pan, and let it flow down.
you notice anything? The soil should have been carried from the shallow pan
down to the deeper pan. That is how erosion
works. The water carries away
the soil and soon it settles in the water.
Step 3: Take your other shallow pan. Put the soil with plants in it and put it where your other shallow pan was.
Step 4: Pour the water from the top of the pan, as you did before.
Did you notice anything? The plants and grass helped keep the soil in place.