Test: Water (Oceans)

Ocean floor has varied and complex features.

Surface salinity is lowered in coastal regions because of the inflow of fresh water from rivers.

Salinity is the saltiness or dissolved salt content of a body of water. It is a general term that is used to describe the levels of different salts, such as sodium chloride, magnesium and calcium sulfates and bicarbonates.

Submarine canyons have been found carving deep cracks that extend from near shore to deep sea edge of the oceanic shelf.

Salinity, generally, increases with depth and there is a distinct zone called the halocline, where salinity increases sharply. Other factors being constant, increasing salinity of seawater causes its density to increase.

A mid-ocean ridge is an underwater mountain system formed by plate tectonics and consequently is termed a divergent plate boundary.

The factor affecting the distribution of temperature of ocean water is latitude, unequal distribution of land and water,prevailing winds ocean currents.

The Pacific Ocean has the most coral reefs amongst all the oceans. There are about twice as many coral species in Pacific Ocean reefs as in Atlantic Ocean reefs.