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sand (or completely dry soil)
a pan
water
watering can
WHAT YOU SHOULD DO
1. Make a pile of sand in the pan.
2. Gently blow on the sand. (The people should not stand close to the sand)
WHAT HAPPENED?
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WHY DO YOU THINK THIS HAPPENED?
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WHAT YOU SHOULD DO
1. Make a pile of sand inn the pan.
2. Fill the watering can with water.
3. Sprinkle the top of the pile with water.
WHAT HAPPENED?
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WHY DO YOU THINK THIS HAPPENED?
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WHY DID THIS HAPPEN?
You caused erosion to happen. In the first part, you created "wind". The "wind" moved the sand. This happened because the sand was not protected. In the second part, you created "rain." The "rain" moved the sand. The sand was not protected.
HOW COULD YOU PROTECT THE SAND?
Would a wall stop the wind from causing erosion? Try putting a cardboard wall around it. What would stop the water from causing erosion? Think about ways to end erosion. Try them on your pile of sand. Do you think that this would work in the real environment?