Sea? What Is a

Although there are no major differences between a sea and an ocean, a sea is an extension of the ocean partly or wholly covering surrounding the land, and is therefore significantly smaller than an ocean.

The word “Sea” is also used to denote smaller, partly landlocked sections of the ocean and certain large, entirely landlocked, saltwater lakes, such as the Caspian Sea, the North Sea, the Red Sea, and the Dead Sea. These water bodies contain minerals like salts of magnesium, calcium, and potassium, amongst many other elements – some in minute concentrations.