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Difference between Tides and Waves. Key Difference: Tides are the rise and fall of sea level that is caused by the gravitational pull of the moon and the sun on the Earth. Waves are actually energy that moves across the surface of the water.
Tides are the regular rise and fall of sea level that occurs either once a day (every 24.8. hours) or twice a day (every 12.4 hours). Tides are waves with very long periods (24.8 or 12.4 hours) and wavelengths. (thousands of km) Tides are shallow-water waves (that is, their speed is slowed by friction with the ocean. bottom) even in the deepest parts of the ocean.