OCS 1005 Chapter : Chapter 9 Review
15 Mar 2019
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It is because the sun is 390 times farther from earth than the moon and the moon exerts over two times the gravitational pull of the sun on tides. The spring tide occurs during full moon phases because the tide is extremely large and the earth, moon and sun are in union. The neap occurs at first and third quarter moons because it the moon is said to be in four and the time between a spring tide and neap is one-quarter the monthly lunar cycle. They are considered shallow water waves, not deep-water waves anywhere in the ocean, because their speed is proportional to their water depth. For a tide to travel 1000 miles per hour, the ocean would have to be 13. 7 miles deep. During a lunar day, most areas on earth should experience two high tides and two low tides of unequal heights. In practice, there are three different tidal patterns.
