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.