Approximately 75% of the Earth's surface up the seas and oceans.They are a single whole, interconnected by straits.The entire planet is called the hydrosphere oceans.In turn, the Earth's oceans contain 97% total water.
How the world's oceans?The world is divided into four parts.It follows oceans: Pacific, Arctic, Atlantic and Indian.
Pacific is considered the largest.Its area is about 166 million sq. Kilometers.It got its name after his first failed to cross the famous traveler Magellan.Water resources of the Pacific Ocean is almost half of the planet's water reserves.The biggest of its length - that's 17 thousand kilometers.This is almost half the globe.But his name does not correspond to reality.Not always it is beautiful and serene.Because of the high seismic activity it is characterized by severe storms and earthquakes that make it awesome.
Pacific Ocean wash the area of land from East Asia to the Americas, including the coast of Africa.The depth of its waters is uneven.The smallest is 120 meters.The average is in the range of 4000 meters.Ocean is famous for the most unique place on Earth, the Mariana Trench, the depth of which is 11022 meters.After investigation it turned out that there are living organisms.
Relief of the Pacific Ocean floor has a different structure.There are present and the ridge of seamounts, and numerous depressions.On its territory there are many islands of volcanic origin.Ocean water rich with living organisms.
Earth's oceans are interconnected with each other.The second largest is considered Atlantic.An area of 82 million sq. Kilometers.The greatest ocean depth reaches 9218 meters.In the middle of its territory stretches a huge underwater ridge.Atlantic Ocean has a great influence on the weather in Europe.
Another representative system that make Earth's oceans, is Indian.Its area - 73 million sq. Km, it is the third largest.It can be called the warmest ocean.In this connection it water is a great variety of vegetable and animal organisms.Around the island of Java, which is located in the Indian Ocean basin found.Its depth is 7,450 meters.A feature of the ocean is a change in the flow of its waters to the opposite.It happens twice a year.
Indian Ocean washes the shores of East Africa, India, Australia and Antarctica.Underwater earthquakes are responsible for the formation of mountain peaks that protrude above the surface and form a chain of islands.
Earth's oceans, and include the smallest Arctic Ocean.It is located between Siberia and Canada.Its special feature is that most of its surface is covered with ice.Therefore, the ocean is not yet fully investigated.The greatest depth is 5000 meters.Closer to the territory of Russia is continental shelf.This determines the depth of the small coastal seas: the Barents, Chukchi, Laptev, Kara, East Siberian.
Seawater 3% consists of the mineral salts.This figure may vary.For instance, Dead Sea water contains 24% salt.Also in the ocean water enters the gold.Its total amount is huge, but the density is so small that it is virtually impossible to obtain.
The world's oceans contain a lot of information about the past of the planet.Their research continues today.Earth's oceans hold a lot of secrets and mysteries.Some phenomena mankind can not solve for a long time.It is a storehouse of minerals and other resources necessary for the people.
