Much of planet Earth is composed of water, with superiority to oceanic waters. The oceans are gigantic bodies of salt water that do not remain paralyzed, on the contrary, they move all the time. Among the various movements, the most prominent are waves, tides and ocean currents.
Waves are formed from the influence of aeolian (wind), which blows over the surface of ocean waters, forcing the movement. The moment the waves approach the coast, the depth tends to decrease, so they bend and break in areas of beaches or rocks. The biggest waves occur in regions of open sea, in this regard the place that presents the highest in the world is in Hawaii, where they reach over 10 meters in height.
Another known movement of the oceans is the tides. They happen every day, the tides correspond to the coming and going of the waters in relation to the coast. The phenomenon in question arises from the influence of the stars, Sun and Moon, which provoke an attraction force on the Earth. When the waters are at a higher level in relation to the coast, we call it high tide and when it decreases, we call it low tide. The advancing and retreating dynamics of the waters occur periodically every six hours. When the waters are at a higher level, the phenomenon is called flood or flow. On the other hand, when the water level decreases, it is called reflux or ebb.
By Eduardo de Freitas
Graduated in Geography
Source: Brazil School - https://brasilescola.uol.com.br/geografia/os-movimentos-das-aguas-dos-mares-oceanos.htm