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A Carolina Exclusive! Grades 9-12. Students explore the formation of soil and its physical properties when it reacts with water. Performing 3 different activities over 2 lab periods, they investigate weathering of rocks, particle size composition of local soils, and the rate of permeability of different soil samples. They apply their knowledge to build a model of a slope that's been cleared for farming and plan how to modify the slope to reduce erosion. Part of the Inquiries in Science® series.