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Oceans are large expanses of saltwater that occupy the depressions of the Earth's surface. THE oceanography It is the specific science that studies the oceans and their characteristics.
The theory of the emergence of the oceans is directly linked to the formation of the atmosphere in the precambrian period.

The planet was very hot in this period and the water vapor in the atmosphere then gave rise to a large volume of rainfall, which accumulated in the lower relief areas.

Importance of the oceans

Oceans are extremely important to the planet because life originated in them. They are the major producers of oxygen, a fact that occurs through oceanic microalgae, also regulate the planet's temperature, interfere with atmospheric dynamics and differentiate climate types. Oceans are also an important transportation route.
The biodiversity found in the oceans is very rich and equivalent to terrestrial ecosystems. In addition, it is a source of mineral extraction and destination for those seeking tourism and leisure.

The five oceans

Even though they are interconnected, the oceans do not exchange much water between them. This is because the waters that make up each of the oceans have their own characteristics, such as temperature, solar insolation, salinity (amount of salts dissolved in water) and movements of waves, tides and currents.

Thus, the oceans, that is, the immense saltwater mass that covers the planet Earth, were divided into five parts:

Antarctic Ocean

Arctic Ocean

Atlantic Ocean

Indian Ocean

Pacific Ocean