As a marine science expert with a background in oceanography, I can explain the difference between high and low tide. High tide is the highest level that the sea reaches during a tidal cycle, while low tide is the lowest level to which the sea recedes. The difference between the two is known as the tidal range. Tides are the periodic rise and fall of sea levels associated with the gravitational forces exerted by the Moon and the Sun, as well as the rotation of the Earth. The gravitational pull of the Moon and the Sun, particularly the Moon, because it is much closer to the Earth, causes the ocean's water to bulge on the side facing the Moon and also on the opposite side. This results in two high tides and two low tides each day, approximately 12 hours and 25 minutes apart. read more >>

The tidal range is the vertical difference between the high tide and the succeeding low tide. 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.read more >>