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The size of the waves depends on the general movement of the ocean
water in the
area, the shape of the sea floor, and whether there are storms or strong winds that
can produce bigger waves.
The word
tide refers to the variation in the general level of the ocean. Tides are
caused by the gravitational
forces of the moon and sun, as well
as the rotation of the
earth. Many places
have one or two times of high tide and
low tide per day:
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