The sea that's always moving
Waves crash from wind, tides breathe in and out with the Moon's pull, and vast currents circle the globe like rivers in the sea. The ocean is never still — three different motions, driven by wind, Moon, and heat, stir it constantly.
The sea is never still
Most waves are made by wind pushing on the water's surface. Tides are the slow, daily rise and fall of the sea, caused mostly by the Moon's gravity pulling on the ocean. Currents are like rivers within the sea — steady flows of water that move heat and living things around the planet.
Simulation · Wave: amplitude & frequency
Change a wave's height (amplitude) and how often it repeats (frequency) to see how energy travels through water.
The Moon runs the tides
As the Earth spins, most coasts get two high tides and two low tides a day, following the Moon overhead.