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| Powerful Waves |
Waves are the forward movement of the ocean's water due to the oscillation of water particles by the frictional drag of wind over the water's surface.
Waves have crests (the peak of the wave) and troughs (the lowest point on the wave). The wavelength, or horizontal size of the wave, is determined by the horizontal distance between two crests or two troughs. The vertical size of the wave is determined by the vertical distance between the two. Waves travel in groups called wave trains.
