Tide= the periodic rising and falling of ocean waters caused by gravitational forces of the sun and moon (they pull on water and create bulges that are high and low tides)
- these high tides occur when the water is pulled towards the moon (also called flood tides because water going towards shore) and low tides are the opposite (also called ebb current because the water moves away from shore)
Spring Tides- when the sun and moon are aligned (full and new moons) and cause extreme height variation in water
Neap Tides- when sun and moon are at right angles (quarter phases) and it is hard to tell the difference between the high and low tides
Semidiurnal- high and low tides at same height (most common)
Mixed Semidiurnal- high tides differ in height
Diurnal- one high and low tide every day (least common)
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