Tide is an important process of the motions of the sea water because the tidal waves produced by the gravitational force of the sun and the moon rise up and fall down regularly. The water level of the sea does not remain the same. This sea water rises up and falls down twice a day at a fixed interval. Rising up of the sea level is called Tide and its falling down is called Ebb. The nature and height of the tides vary at different places.
