The word "tides" is a generic term used to define the alternating rise and fall in sea level with respect to the land, produced by the gravitational attraction of the moon and the sun. The gravitational attraction of the moon causes the oceans to bulge out in the direction of the moon. Another bulge occurs on the opposite side, since the Earth is also being pulled toward the moon (and away from the water on the far side). Ocean levels fluctuate daily as the sun, moon and earth interact. As the moon travels around the earth and as they, together, travel around the sun, the combined gravitational forces cause the world's oceans to rise and fall. Since the earth is rotating while this is happening, two tides occur each day. The ocean is constantly moving from high tide to low tide, and then back to high tide. There is about 12 hours and 25 minutes between the two high tides.
When the sun and moon are aligned, there are exceptionally strong gravitational forces, causing very high and very low tides which are called spring tides, though they have nothing to do with the season. When the sun and moon are not aligned, the gravitational forces cancel each other out, and the tides are not as dramatically high and low. These are called neap tides.
2006-06-11 01:17:59
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answer #1
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answered by Pringles 1
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High tide when the water level is at it's deepest, and ebb tide when the ocean's water level is at the lowest. The moon controls the ocean's rise and fall of water (and many other things).
2006-06-13 22:37:10
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answer #2
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answered by organic gardener 5
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rise of sea water is known as high tide and fall of level is low tide.
any other reference u can ask.
2006-06-11 08:01:45
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answer #3
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answered by arora s 1
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Ebb tides?
2006-06-11 07:56:04
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answer #4
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answered by jammer 6
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umm the tide
2006-06-11 07:55:03
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answer #5
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answered by Anonymous
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the tide
2006-06-11 07:55:35
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answer #6
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answered by scottrs75 2
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the tide.
2006-06-12 12:01:10
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answer #7
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answered by Ted 5
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