1517255
9780924886324
Students observe the passage of hundreds of thousands of years without leaving their desks! By creating desktop river models, students observe how rivers, canyons, deltas, and other geological formations change over time. The river models enable students to gain experience with concepts such as geological time, erosion, and pollution.Sneider, Cary I. is the author of 'River Cutters' with ISBN 9780924886324 and ISBN 0924886323.
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