'Steep narrow mountain valley' presentation slideshows

What are the forces of erosion and deposition that shape our landscape?

Suppose that you fill a jar halfway with layers of gravel, sand, and soil. Then you fill the jar with water, cover it tightly, and shake for 5 seconds. What effect would shaking the jar have on the soil, sand, and gravel? What would happen to them after the shaking stops? Explain your answer.

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