Oceanography and the movement. By zerik favorel

Oceans in Motion: Waves and Tides

There are waves of all sizes and shapes rolling into the beach at any given time. If they’re not stopped by anything, waves can travel across entire ocean basins and so the waves at your beach might be from a storm half a world away

Tides in the ocean that go across a lot of the ocean are called wind driven waves.

Different parts of the wave

Crest-the very top of the wave

Trough-the hollow between two crests

wavelength-the horizontal distance between any one point on one wave and the corresponding point on the next

amplitude-the maximum vertical displacement of the sea surface from still water level

Seafloor spreading is a geologic process in which tectonic plates—large slabs of Earth's lithosphere—split apart from each other.

Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle’s convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor.

How the moon and sun affects the oceans.

Tides are the periodic rising and falling of ocean waters caused by the gravitational forces of the sun and moon.

The vertical motion of tides is accompanied by a horizontal movement of ocean waters called tidal currents. Oceanographers say that tides rise and fall, while tidal currents ebb (during a falling tide) and flood (during a rising tide).

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