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Water Cycle & Erosion Opens with the origin of the atmosphere, then traces the path of water from the great reservoirs of the oceans through evaporation, condensation and precipitation over the land to its eventual return to the ocean. Shows the relentless erosive action of running water, how small rivers cut deep valleys, and the more subtle effects of chemical weathering. 15 minutes |
| VCT-18 VHS...$69.00 | |
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