Why does the tide change every 6 hours?

Answer 1

6 + 6 = 12 and 12 + 12 = 24, the hours in one day. As the earth spins, the moon's gravity attracts a bulge in the ocean waters that produces a tide every 12 hours. But at the same time there is another bulge in the ocean on the side of the earth away from the moon, because there is less attraction from the moon there (more distant) and the centrifugal outward force on the ocean water is therefore less restrained. Thus there are two complete tides every 12 hours and the flow in and out of a bay changes every 6 hours (approximately). The pull of the sun also affects the tides to a lesser extent either aiding or working against the lunar tide.

Answer 2

Tides are created because the Earth and the moon are attracted to each other, just like magnets are attracted to each other. The moon tries to pull at anything on the Earth to bring it closer. But, the Earth is able to hold onto everything except the water. Since the water is always moving, the Earth cannot hold onto it, and the moon is able to pull at it. Each day, there are two high tides and two low tides. The ocean is constantly moving from high tide to low tide, and then back to high tide. There is about 12 hours and 25 minutes between the two high tides.







Main Reason: Gravitational pull of the moon

Answer 3

Gravitational pull from the moon