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Variations in tidal range along a coastline is primarily caused by the fluctuations in external gravitational forces acting on the earth, caused in greater extent by the moon and lesser extent the sun. What are naturally observed on a coastal area over time are the changes of water level from high tide (maximum water level) to low tide (minimum water levels). However, in the correct spot and correct time period, it would be observed that the earth has two high tides (semidiurnal tide), as opposed to one high tide (diurnal tide). This second high tide is opposite on earth than the tide influenced by the moon and is caused by a combination of inertia and gravity resulting from the moon-earth system.

At any given time, the moon is applying its gravitational pull towards its center of mass on various parts of the earth. The pull it exerts on water is strongest on the side of earth facing the moon, and is at its weakest on the ‘far side,' that opposite the moon. Thus, the......

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Approximate Word Count: 698
Approximate Pages: 3 (250 words per double-spaced page)

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