TIDE 1 KG
Tides are caused by gravitational pull of the moon and the sun. ... Tides are very long-period waves that move through the oceans in response to the forces exerted by the moon and sun.
Tides originate in the oceans and progress toward the coastlines where they appear as the regular rise and fall of the sea surface
Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun, and the rotation of the Earth. Tide tables can be used for any given locale to find the predicted times and amplitude.