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Students work in groups around home-made stream tables. Each person in the group is assigned a role that is involved in maintaining the stream table (such as the hose-holder, the bucket-holder, the person who turns on and off the water, and the recorder). As a group, they turn on the water and observe what happens when water and sand interact on a slope. Once a stream has formed, they draw the stream, noting locations where erosion and deposition have occurred. Then, they take measurements of the stream channel and stream flow in order to calculate velocity, sinuosity, gradient, and discharge. This activity encourages students to work in groups, use math within a scientific context, and learn about how streams work in a hands-on manner.
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