Tides
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Tides are defined as the vertical movements of water as it goes up and down. The tides are caused by the gravitational pull of the Moon and the sun on the oceans of the earth. In general tidal cycles contain two high tides and two low tides each day. The Earth projects slightly both toward and away from the Moon. As the Earth rotates daily, the projections move across the Earth. Since the Earth's water is more fluid than the land, it moves slightly more, resulting in high tides. On the side of the earth opposite from the moon, the force caused by the earth's rotation produces another amount of water and high tide on the opposite side of the earth. Somewhere in between these two high tides are two flat areas on the surface of the ocean, these are low tides. Between the times of high and low tides there will be a current flow. The time difference is a little bit over 6 hours and the entire tidal cycle repeats itself approximately 50min later each day...