How did the ocean originate?

The distance between the earth and the sun is not far or close, and the atmospheric environment can retain more energy for the earth, so the temperature on the earth's surface is suitable, liquid water can exist, and the density of water is very small.

Inner lava, iron-nickel core. Although in gravity.

Under the action of the earth, the earth formed a spherical structure, but because the earth's ** material is not unified and comes from different periods, plus the movement of the earth's crust.

There is a swelling and valley bottom on the earth's surface, and liquid water is concentrated in the lower part due to gravity, and such a large amount of water on the earth is gathered together to be the ocean.

<> for a long time, water vapor.

Coexisting with the atmosphere in the sky around the Earth, darkening the dense clouds in the sky. As the earth's crust cools and the atmosphere cools, water vapor accumulates as condensation nuclei in water droplets of dust and ash. Due to uneven cooling, air convection is serious, forming thunder and lightning winds and turbid currents of heavy rain.

The surging floods, through thousands of rivers and ravines, converge into a huge body of water, which is the primordial ocean. About 5 billion years ago, the solar system.

It is a chaotic mass of primordial nebula matter. These substances collided with each other and grew, eventually giving birth to the primordial Earth about 4.6 billion years ago.

The primordial Earth continues to grow by cleaning up small primitive objects in its orbit. The surface of the primitive earth was very hot, and there was this lava flow all over the earth's surface, in a molten state.

At this time, there are no oceans on Earth. Later, due to changes in temperature and gravity, the earth's materials gradually separated into layers, and gaseous substances such as hydrogen and oxygen began to rise to the surface and produced water through chemical action. This is the most important part of the water on Earth.

As the Earth's surface cools completely, the temperature drops. Water vapor from the Earth's primordial atmosphere condenses into water droplets that fall to the ground. When the first raindrops hit the ground, the earth began its sea-building movement.

Millions of years! Heavy rains fell on the Earth's surface, filling the Earth's lowlands with large amounts of water, thus forming the first oceans.

To explain it as the most common physical phenomenon, it is that the water vapor in the air is cooled to form small water droplets, which gather into clouds, and later form rain, which falls on the earth, and many, many rains form the sea.

Water vapor accumulates more and more on the earth, and then forms rainfall, a large amount of rainwater that falls to the ground, and finally collects in low-lying places, forming primeval oceans.

The origins of the oceans are very ancient, and then we will also learn about some pictures of marine life based on corresponding experiments and research, which can be traced back to ancient times.

How exactly are oceans formed? In fact, this is still a matter of debate in the scientific community until now.

In addition to the well-known meteorite theory, there are four main theories about the formation of oceans.

1.Clouds of gas and dust give birth to the oceans.

Clouds of gas and dust form water precipitates, which are sealed in the interior of the earth as a by-product of the universe, and then these sediments are ejected like steam, forming wide and old water-rich clouds, and then forming oceans.

2.Volcanic activity.

Billions of years ago, there was widespread fire on the earth, and volcanic eruptions erupted water deposits from the earth. It turns into water vapor and eventually forms clouds in the atmosphere.

3.Raw cooling.

This is the idea that once the Earth's otherwise hot temperature drops dramatically, liquid water can form. I think there are many doubts about this kind of argument, and with the current level of scientific understanding and research, this argument cannot be well confirmed, so the credibility is not high enough.

4.There is a vast ancient ocean underneath.

According to numerous scientific studies, hundreds of meters of rock underground contain a large amount of water. And this view is currently accepted by the majority of people. Hunger, and I myself believe in this argument even more.

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, it seems more appropriate to call it a water ball.

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.

Science: Earth, Universe, Large**, Ocean, Geology.

The total area of the earth's oceans reaches 100 million square kilometers, accounting for 71% of the earth's surface area, and the water storage in the oceans exceeds 1.3 billion cubic kilometers, accounting for about 97% of the earth's total water resources. Despite such a huge amount, the oceans did not exist when the earth was first formed, but rather the product of accumulation.

When the earth was first formed, it was always hit by various meteorites and asteroids in the universe, and the radioactive elements inside the earth generated a lot of heat, so the ground at that time was full of erupting volcanoes and flowing lava, and the earth was basically a big fireball covered with lava. When the number of asteroids hitting the Earth decreased, the temperature on the Earth's surface decreased, and the magma slowly solidified and agglomerate, forming a cratered primitive crust.

The formation of the primitive crust (from left to right: magma everywhere - magma gradually cooling - potholed primitive crust).

Along with the magma is a large amount of gas and dust, which gradually rises due to its relatively light mass, because the earth's gravity wraps around the outer layers of the earth, forming a primitive atmosphere over time. Various substances in the primordial atmosphere mix together and various chemical and physical reactions occur, causing the atmosphere to begin to rain. This rainwater flows in the low-lying areas of the earth's crust and finally converges along the topography to form a primordial ocean about 3.5 billion years ago.

Light mass gases rise - primordial atmosphere - rainfall.

The formation of the primordial ocean (from left to right): magma erupting.

Heavy magma, dust sinking - primitive crust - stagnant water - primordial ocean.

The above content refers to Milley's children's book "A Brief History of Life".

In fact, the sea was formed by too much water vapor during the first volcanic eruption in the history of the earth, and then it rained heavily for thousands of years to form the ocean.

Formation process: 1. Studies have proved that about 5 billion years ago, some 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.

2. 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.

3. After the earth's crust has been cooled and shaped, the earth is like an apple that has been dried for a long time, with wrinkles and uneven surfaces. Mountains, plains, river beds, sea basins, all kinds of terrain are available.

Fourth, for a long period of time, water vapor and atmosphere in the sky coexisted; 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.

5. In the primitive 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.

6. In short, after the gradual increase of water volume and salinity, and the vicissitudes of geological history, the primordial ocean gradually evolved into today's ocean.

First of all, let's talk about the formation of ocean basins. The original hypothesis was the "cold shrinkage theory," which posed that the Earth was a molten magma fireball separated from the blazing sun. Due to thermal expansion and contraction, the surface cools quickly and the inside cools slowly, so that the outer and inner cavities become larger and larger.

During the rotation, the rock mass above the void sinks due to gravity, creating a deep and wide depression. This is the original ocean.

With ocean basins, there is no ocean without seawater. Where does the sea come from? "The water of the Yellow River comes from the sky", and the water on the earth mainly comes from the sky.

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. The water vapor emitted by volcanoes is an important part of the earth's water**. 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 low-lying parts of the earth's crust to form lakes and oceans.

It is said that the sea water was bitter and salty, but the pristine ocean water was not as salty as it is today. It turns out that the atmosphere and volcanoes eject gases with some solid vapors, such as sodium chloride, magnesium chloride and other salts, which are dissolved in water and flow into the ocean. In addition, some salts from weathering of some rocks on land and on the seabed also flow into the seawater.

Over time, the salt in the sea became more and more salty, and it became saltier and saltier, and it became the sea water it is today.

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

The vast oceans are beautiful and spectacular, but did you know that when the earth was first formed, there were no rivers and oceans, and there was very little moisture in the atmosphere, and even if there was some, it evaporated with other gas molecules? Later water on Earth was produced from the Earth's interior along with the primordial atmosphere. In the early days, the earth's crust had only recently consolidated, and the earth's interior was full of "lava oceans", and volcanic eruptions came and went, bringing out a large amount of water vapor that rushed into the sky and gathered into an incomparably thick cloud.

As the Earth gradually cools, when water vapor exceeds its saturation point, it begins to condense into water droplets, ice crystals. As a result, it has triggered a storm of "overwhelming mountains and seas", and it will be hundreds or thousands of years as soon as it "goes down". The rain kept flowing to the low-lying areas, and year after year, day after day, the primeval ocean was born.

At this time, the ocean water is not only severely hypoxic, but also contains a large number of volcanic eruption acids, such as HCl, HF, CO2, etc., which has a strong solubility ability. According to scientists' study of fossils, primordial oceans were formed about 3.9 billion years ago.

In terms of scale, the area of the primeval ocean was nowhere near as large as that of the modern ocean. It is estimated that it had only about 10% of the water of the modern ocean. Later, thanks to the addition of structural water stored in the earth's interior, the primordial ocean gradually grew, forming the magnificent modern ocean.

The water in the primeval ocean was not as bitter and salty as modern seawater. The inorganic salts in modern ocean water are mainly brought into the sea from land through the repeated water cycle in nature and increase year by year. However, the organic macromolecules in the primeval ocean are very abundant and beyond the reach of the modern ocean.