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it causes the difference in density, denser water flows to the less dense parts
The Oceanic crust is denser than the continental crust
Convection occurs whenever a less dense liquid is beneath a denser liquid.
sinks
ocean water, because it is saltier.
Ocean crust is denser
Sea water is denser, not only that, different oceans have different densities.
The ocean is stratified with denser layers below less dense layers.
because it is colder up there
The water of the oceans is denser because of the high level of salt it contains.
denser
sinks