The tides are governed by the gravitational pull of the moon and sun. This pulling force drives the rise and fall of a body of water over a period of time, creating tides. There are many different types of tides. A bore tide is where the edge of water in a bay or river creates a tide moving in the opposite direction of the water. A rip tide is created when water from a river channels into an ocean through the surf line; it is fast and furious. This strong channel of water cre