Tides
Tides are the periodic rise and fall of ocean waters affecting coastal areas around the world.
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This introduction to tides gives an overview of the concepts and activities explored in this unit and describes how these investigations build an understanding of ocean literacy.
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Tides rise and fall daily in predictable patterns. Scientists and mariners use specific terminology to describe a variety of tide properties.
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Gravity from the sun and the moon pull on Earth’s water to form tides.
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The tides rise and fall daily due to the rotation of the earth. Tidal height is caused by a combination of gravitational forces from the moon and the sun.
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The predictable movements of the earth, the sun, and the moon allow us to accurately forecast future tides.
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Different coastlines have distinct patterns in their daily tides. Tidal patterns determine tidal currents.
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