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provides online tutorials on corals, currents, estuaries, geodesy (global positioning), pollution, and tides; case studies on an oil spill and an invasive species (Lionfish); two mysteries for young students (grades 3-5) to solve; and dozens of lesson plans on climate change, coral reefs, currents, ecosystems, estuaries, global positioning, habitat management, marine sanctuaries, navigation, ocean exploration, pollution, tides, and more. (National Oceanic and Atmospheric Administration)
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Tides are very long-period waves that move through the oceans in response to the forces exerted by the moon and sun. Tides originate in the oceans and progress toward the coastlines where they appear as the regular rise and fall of the sea surface. When the highest part, or crest of the wave reaches a particular location, high tide occurs; low tide corresponds to the lowest part of the wave, or its trough. |
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Corals |
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