How are oceans formed, and how are oceans formed?

Science is not yet able to give a final answer to these questions, because they are linked to another universal and equally unresolved question of the origin of the solar system.

Research now proves that 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 melt. 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.

The influence of ocean currents is here.

For a long time, water vapor in the sky coexisted with the atmosphere; Thick clouds. As the earth's crust cools down, the temperature of the atmosphere slowly decreases, and the water vapor condenses into water droplets with dust and ash as condensation nuclei, accumulating more and more. 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 a long, long time.

The surging floods, through thousands of rivers, converge into a huge body of water, which is the primordial ocean.

In the pristine ocean, the sea water is not salty, but acidic and hypoxic. The water evaporates and rains on the terrain and falls back to the ground, dissolving the salt from the rocks on land and the seabed and collecting them in the seawater. After hundreds of millions of years of accumulation and fusion, it has become a roughly uniform salty water.

At the same time, because there was no oxygen in the atmosphere at that time, and there was no ozone layer, ultraviolet rays could reach the ground, and with the protection of seawater, life was born in the ocean. About 3.8 billion years ago, organic matter was created in the oceans, and there were lower single-celled organisms. In the Paleozoic Era, 600 million years ago, there were seaweeds, which photosynthesized in sunlight and produced oxygen, which slowly accumulated and formed the ozone layer.

At this point, creatures began to land on land.

In short, through the gradual increase in water volume and salinity, and the vicissitudes of geological history, the primordial ocean gradually evolved into the ocean it is today.

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The formation of the oceans began at the beginning of the formation of the earth.

About 4.6 billion years ago, a part of the dust in the universe accumulated together to form the Earth, which was just formed at a very high temperature and full of erupting volcanoes. Volcanoes in addition to spewing magma.

In addition, a large amount of water vapor is emitted.

and other gases.

Later, the water vapor on the earth accumulated, and they became clouds when they were cold in the air. As the ground cools slowly, small droplets of water in the clouds turn into rain and fall. The large amount of rainwater that falls to the ground and finally collects in low-lying places, forming a primeval ocean.

The pristine ocean water is not salty, but acidic and hypoxic. The primordial seawater evaporated and fell, dissolving the salt of the land and the rocks on the seabed, and converging over hundreds of millions of years to form the ocean that is now formed.

01 Due to the thin crust of the earth and the continuous bombardment of the earth's surface by small celestial bodies, magma is constantly spewing out, so the earth is a sea of firewater accumulation. The magma is accompanied by a large amount of gas and dust, which rises into the air and forms clouds. Small droplets of water in the clouds turn into rain.

After a long period of rainfall, a large amount of rainwater gradually accumulated in the low-lying areas of the original crust, forming an ocean.

The vast interconnected waters of the Earth make up a unified marine world. Before scientists reach the bottom of the sea, it is all so mysterious and so fascinating. Humans with a spirit of exploration have marched to the ocean again and again to unveil the seabed.

The ocean is a general term for a vast and continuous body of saltwater on Earth. It has a total area of about 100 million square kilometers, which is about 71% of the Earth's surface area. If you look back at the earth from far away, you will feel that the earth is called"Water polo"Seems more appropriate.

The central main part of the ocean is called the ocean, and the peripheral part is called the sea. The sea and the ocean are connected to each other and together form a unified ocean of the world. So how did the ocean form in the first place?

The earth's crust is uplifted by the upwelling of internal materials and stretched to both sides under tension, resulting in local ruptures and the formation of a series of rifts and lakes. Later, the continental crust was eventually pulled off, and magma swelled up along the cracks, condensing into the continental crust, and a new ocean was born.

So where does the sea water come from? Water on Earth comes mostly from the atmosphere. At the beginning of the earth's existence, the internal matter differentiated at high temperatures to produce gases, forming a primitive atmosphere that included a large amount of water vapor.

Water vapor emitted by volcanoes is important for water on Earth**. When lava cools and crystallizes, it also releases large amounts of water. At the end of the day, both water and the atmosphere come from the Earth's interior.

These waters converge in the lower parts of the earth's crust to form lakes and oceans.

It is generally said that the eruption of volcanoes on the primitive earth caused various water vapor and carbon dioxide to form clouds, causing rainfall to accumulate in the depressions on the earth, but there are many hypotheses.

When there is more water, it is formed.

The birth of the earth How continents and oceans were formed.