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1. We put the same amount of dirt in the boxes.
2. We put a cup with a hole so the water goes but not too much.
3.We let the water run and when it dries we observe the path that water left.
Research
Soil is a natural resource but the world is facing a big problem of erosion. When farmers long ago cleared fields to plant crops , they pulled out trees and native plants that kept the soil in place.
Sometimes wind and water carried away unprotected soil and let the land unsuitable for farming.
How does water cause soil erosion?
things we don