How deep is the ocean Want to know how deep the ocean is?

The average depth of the world's oceans reached 3,688 meters.

The oceans are huge, covering about 71% of the Earth's surface, with an average depth of about 3,800 meters, and humans have only reached the bottom of 5% of the oceans. It can be said that most of the seabed is completely unknown to humans.

The deepest place in the world is the Mariana Trench at the junction of the Pacific and Philippine plates.

The deepest point is 11,034 meters below sea level, which holds the entire Mount Everest.

It is also more than enough. And no living thing can live on such a seabed, because the extremely strong water pressure is enough to crush any marine animal.

The survival limit of living creatures is only more than 8,000 meters.

The sea is the ocean. In fact, there are still some differences between the sea and the ocean.

The sea is close to the mainland, and the temperature, salinity, color and transparency of the sea are affected by the land, and there are obvious changes in the temperature, salinity, color and transparency of the sea.

The sea is not flat-bottomed, and the world's coastal sea is also the largest coral sea in the world.

The deepest point reaches 9,140 meters, which is the deepest along the coast.

The deepest part of the world's oceans is the Mariana Trench in the Pacific Ocean, reaching a maximum depth of 11,521 meters, and the top trenches are all in the Pacific Ocean.

The average depth of the world's oceans is about 3,347 meters.

The deepest part of the world's oceans is the Mariana Trench in the Pacific Ocean, with a maximum depth of 11,034 meters, which is near the Philippines and was formed by the subduction of the Pacific plate under the Eurasian plate.

In the case of human hands, there have been people who have created a depth of more than 400 meters, with the help of ropes and heavy objects to sink quickly, and with the help of air bags to quickly float, but there is no oxygen, anti-pressure equipment, etc., basically do not use diving equipment. Wearing a wetsuit and using oxygen, the safe depth of diving is about 400 meters.

If you want to dive to deeper depths, you have to use special oxygen, a mixture of oxygen and noble gases, which can dive to greater depths, but the danger is further increased, mainly because of the problem of blood dissolving other gases.

Classification of ocean depths:

The depth of the ocean is divided into five water layers: the upper ocean layer (above 200 meters), the middle ocean layer (200 meters 1 km), the deep ocean layer (1 km 4 km), the ocean abyssal layer (4 km 6 km), and the ocean ultra-abyssal layer (below 6 km).

According to the intensity of sunlight, from the surface of the ocean to the depth of 200 meters of water, called the upper layer of the ocean, where the sunlight penetrates the seawater, the water is relatively bright, and the sea water is blue and blue; The water layer from 200 meters to 1,000 meters deep is called the middle ocean, where the sunlight cannot pass through all the seawater, the light is very weak, and the sea water is black and blue.

The water layer from 1,000 meters to 4,000 meters is called the semi-deep sea layer, where there is no sunlight at all, it is pitch black, and it is a dark world; Below 4,000 meters is the abyssal layer, which is even darker, but most of the fish in the semi-abyssal and abyssal layers have light-emitting organs to help them forage and move in the dark.

The average depth of the ocean, which scientists have measured so far, is meters.

The deepest part of the world's oceans is the Mariana Trench in the Pacific Ocean, reaching a maximum depth of 11,034 meters

The depth of the ocean is divided into five water layers: the upper ocean layer (above 200 meters), the middle ocean layer (200 meters 1 km), the deep ocean layer (1 km 4 km), the ocean abyssal layer (4 km 6 km), and the ocean ultra-abyssal layer (below 6 km).

According to the intensity of sunlight, from the surface of the ocean to the depth of 200 meters of water, called the upper layer of the ocean, where the sunlight penetrates the seawater, the water is relatively bright, and the sea water is blue and blue; The water layer from 200 meters to 1,000 meters deep is called the middle ocean, where the sunlight cannot pass through all the seawater, the light is very weak, and the sea water is black and blue.

The water layer from 1,000 meters to 4,000 meters is called the semi-deep sea layer, where there is no sunlight at all, it is pitch black, and it is a dark world; Below 4,000 meters is the abyssal layer, which is even darker, but most of the fish in the semi-abyssal and abyssal layers have light-emitting organs to help them forage and move in the dark.

The average water depth is about 3,795 meters, and as of 2021, the deepest known Mariana Trench is 10,909 meters.

The ocean covers an area of about 362,000,000 square kilometers (140,000,000 square miles), nearly 71% of the Earth's surface area. The oceans contain more than 1.35 billion cubic kilometres of water, accounting for about 97 per cent of the Earth's total water.

The four main oceans of the ocean are the Pacific, Atlantic and Indian Oceans, and the Arctic Ocean (some scientists have added the fifth ocean, the sea near Antarctica), most of which are bounded by land and seabed topography.

Causes of the formation of the ocean.

About 5 billion years ago, a number of large and small nebulae were separated from the solar nebula. They rotate while revolving around the sun. In the process of movement, they collide with each other, and some clumps combine with each other, from small to large, and gradually become the primitive earth.

During the collision of nebula masses, the sharp contraction under the action of gravity, coupled with the transformation of the internal radioactive elements, caused the primitive earth to be continuously heated and warmed. When the internal temperature reaches a high enough level, the substances in the earth, including iron, nickel, etc., begin to dissolve.

Under the action of gravity, the weight sinks and tends to concentrate on the center of the earth, forming the earth's core; The lighter ones rise to form the earth's crust and mantle. At high temperatures, the moisture inside vaporizes and rushes out along with the gases and soars into the air. But due to the gravitational pull of the center of the earth, they will not run away, and only around the earth, becoming a circle of air and water.

A layer of crust located on the surface of the earth, in the process of cooling and condensation, is constantly impacted and squeezed by the violent movement of the earth's interior, so it becomes folded and uneven, and sometimes it is squeezed out, forming ** and volcanic eruptions, spewing out magma and hot gas. At first, this happened frequently, but gradually became less and less common and slowly stabilized. This process of differentiation of light and heavy materials, resulting in great turmoil and great reorganization, was completed about 4.5 billion years ago.

After the earth's crust has been cooled and shaped, the earth is like a long-left and dried apple, with a wrinkled and uneven surface. Mountains, plains, river beds, sea basins, all kinds of terrain are available. For a long time, the sky was full of water vapor and the atmosphere, and the sky was dark and dark.

As the earth's crust cools and the temperature of the atmosphere slowly decreases, the water vapor condenses with dust and ash and becomes water droplets. Due to uneven cooling, the air convection is violent, forming thunder and lightning winds, torrential rain and turbidity, and the rain is getting heavier and heavier, and it has been raining for hundreds of years. The surging floods, through thousands of rivers, converge into a huge body of water, which is the primordial ocean.

The above content reference: Encyclopedia - Ocean.

Encyclopedia - Mariana Trench.

The deepest is the Mariana Trench, which has 11,034 meters.

At its deepest point, 6,11 kilometres, it is the deepest known ocean, and it is one of the harshest areas on Earth due to its high water pressure, complete darkness, low temperatures, low oxygen levels and lack of food resources.

The Mariana Trench is a plate subduction zone, and the geological movement of the seabed is very active, and the material composition and genesis of seamount volcanic rocks are of interest to marine geologists.

Explore the results. On May 8, 2020, Vityaz-D, a new autonomous submersible manufactured by Russia's Ruby Marine Machinery ** Design Bureau (RUBIN), is the world's first autonomous water ** vessel that reached a depth of 10,028 meters (32,900 feet) in the Mariana Trench of the World Ocean.

The submarine was developed jointly by the Ruby Design Bureau (RUBIN) and the Russian Advanced Research Project**. The Russian Navy plans to replace its fleet of unmanned deep-sea submersibles with Vityaz-D UAVs for military operations.

At 8:12 a.m. on November 10, 2020, the Chinese manned submersible "Struggler" successfully dived more than 10,000 meters in the Mariana Trench in the western Pacific Ocean and successfully sat on the bottom at a depth of 10,909 meters. It has set a new record for manned deep diving in China, and it is also the first time in the world that three people have been brought to the deepest part of the ocean at the same time.

The average depth of the global ocean is 3,688 meters. The Pacific Ocean is the deepest of the Earth's five oceans, reaching an average depth of 3,970 meters. The shallowest of the five oceans is the Arctic Ocean, which has an average depth of about 1,205 meters.

How deep the ocean is

The area of the ocean at a depth of more than 200 meters can be called the deep sea, which is characterized by high pressure, no light, high salinity, low water temperature, slow bottom current, abundant oxygen content, and more sediment.

The deepest part of the world's oceans is the Mariana Trench in the western Pacific Ocean, which can reach a maximum depth of 11 kilometers.

70% of the Earth's total area is covered by oceans of liquid water. The ocean is not only the cradle of human life, but also an important source of the earth's water resources, biological resources and mineral resources.