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provides video clips and interactive resources for learning about biogeochemical cycles, earth's changes and history, earth's surface and internal processes, energy, natural resources, the rock cycle, and soil structure and formation. Find lessons on wind power, earthquakes, environmental change, plate tectonics, recycling and composting, the scientific process, seasons, and volcanoes. (Teachers' Domain, Multiple Agencies)
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The Colorado River has flowed through the Grand Canyon for about five million years, and it continues today to slowly cut its channel deeper into the rock. In the deepest part of the canyon, the water flows past its oldest rock, known to geologists as the Vishnu Schist. |
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Making big waves |
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