How did the earth come to be, and how did the earth come to be?

The formation of the primitive earth.

Before the formation of the earth, there were many asteroids in the universe revolving around the sun, and these planets collided with each other to form the primitive earth, when the earth was still a hot fireball, and as the collision gradually decreased, the earth began to cool slowly from the outside to the inside, producing a thin layer of hard shell - the earth's crust, at this time the earth was still in a hot state. A large amount of gas is ejected from the inside of the earth, which carries a large amount of water vapor, which forms a circle of atmosphere surrounded by the periphery of the earth, the position of the earth from the sun is not too close to the water vapor is evaporated by the sun, and the size of the earth itself has enough gravity to pull the atmosphere, so the earth will have a unique atmospheric environment, and the atmosphere begins to rain after the formation, and the original ocean is formed.

About 4.7 billion years ago, dust gathered in the universe to form the Earth and the other planets of the solar system in which it is located. At that time, the air did not contain oxygen, but contained a lot of carbon dioxide (carbon dioxide gas) and nitrogen.

Originally, the Earth was small, but it continued to increase in size due to the constant impact of small stars in the universe. And when it hits, the energy gathers, the temperature rises, and eventually melts into a liquid.

Soon, the number of star impacts decreased, and the temperature of the Earth's surface decreased, forming the Earth's crust. This is the surface of the earth today. However, magma in the Earth's interior is constantly erupting, forming a large number of volcanoes. The water vapor in the volcanic ash cools and condenses into water, which forms the ocean. Formation of balls.

The formation of the primitive earth.

Before the formation of the earth, there were many asteroids in the universe revolving around the sun, and these planets collided with each other to form the primitive earth, which was still a hot fireball at that time.

As the collisions gradually decreased, the earth began to slowly cool from the outside in, creating a thin layer of hard crust - the earth's crust, and the interior of the earth was still in a hot state.

Formation of the atmosphere and oceans.

A large amount of gas is ejected from the inside of the earth, which carries a large amount of water vapor, which forms a circle of atmosphere surrounded by the periphery of the earth, the position of the earth from the sun is not too close to the water vapor is evaporated by the sun, and the size of the earth itself has enough gravity to pull the atmosphere, so the earth will have a unique atmospheric environment, and the atmosphere begins to rain after the formation, and the original ocean is formed.

The formation of the Earth began with the contraction of the solar nebula.

The interstellar dust material (mainly ice and rocky, about millimeter in diameter) that is already present in the nebula gas acts as a condensation nucleus, slowly absorbing the particles scattered around it, gradually increasing in mass over time.

At this time, it is called "star", and then the accretion process is more intense, the stars will collide and fuse, and finally form a protoplanet, and then further evolve into planets, continuous accretion, continuous collision and fusion, and the earth is formed in this way.

Interstellar dust plays two important roles in the formation of the solar system

The first is cooling, when the nebula shrinks, the temperature increases gradually from the outside to the inside, and this dust can help the nebula cool the interior of the nebula, so that the pressure generated by the thermal movement inside the nebula can be reduced, which will play a role in gravitational contraction.

The second is that these interstellar dust can act as condensation nuclei, just like the formation of snowflakes on the earth, three major conditions: water vapor, low temperature, and condensation nuclei, so these interstellar dust will continue to adsorb the scattered particles around them, slowly grow, and finally form larger stars, and then collide and merge with each other to become protoplanets and planets.

It is the only known planet in the solar system that has life. How did the earth come to be? For centuries, scientists have searched for a satisfactory answer to this question. There are currently several theories about the origin of the earth:

Comet collision said.

MSI Doctrine. In 1900, the American scientists Thomas, Zoud Chamberlain, and Forrest Ray Morton rediscovered Bufeng's theory in their research. They believe that a long time ago, when another star passed near the Sun, under the action of gravity, some of each of them broke away from their parent bodies and formed new individuals, which rotated sharply under the gravitational force and thus gained a large amount of angular momentum. After separation, these individuals gradually cool down and decrease in size, becoming solids or microstars, which form planets when they collide further.

Matter from two stars clumps together to form a family of planets, a hypothesis known as the "MSI Theory".

The capture theory holds that the sun captured matter from interstellar space to form a primordial nebula, which later coalesced into the Earth and planets. For example, in 1944, the former Soviet geophysicist Schmitt proposed that the rotating gases captured by the sun, the solid particles in the dust, eventually condensed to form the earth and the sun.

Gas Chaosheng said.

There is some truth to all claims, but there is a lack of hard evidence, so to this day, how the earth came to be remains a mystery.

2. After different centuries, different geological ages have different characteristics.

3. 2.4 billion years ago, the primordial sphere began to appear on the earth, and lower life and living environment began to form.

4. In the era of primitive organisms, marine life began to appear.

5. With the evolution of organisms, more and more animals began to appear on the earth.

6. The development of the natural world eventually led to the emergence of human beings.

7. With the passage of time, there is today's earth.

About 5 billion years ago, the Milky Way was filled with a large amount of nebulous material. They contract due to their own gravitational pull, and the vortices created during the contraction cause the nebula to break into many "pieces". Among them, those fragments that form the solar system are called solar nebulae.

The solar nebula contains solid dust particles that are not easily volatile. These dust particles combine with each other to form larger and larger particle rings, and begin to adsorb some of the smaller dust particles around them, so that the volume increases day by day, and gradually the Earth star embryo is formed. The Earth's star embryo moves within a certain range of space and continues to grow itself.

Thus, the primordial earth was formed. The primordial earth has evolved and grown to what it is today.

The Earth is a member of the solar system. The solar system family consists of the Sun, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, and 500,000 asteroids, moons, and comets. The Sun is the parent of the solar system.

Before the formation of the solar system, it was a nebula made up of red-hot gas, which rotated when the gas cooled and caused contraction. Due to gravity, the gas and wind wind and grass contract and rotate faster, and the nebula becomes a flat disk. We know that the washing machine used to wash clothes in modern families has a dehydrator, put wet clothes in it, and the dehydrator rotates quickly, and the moisture in the clothes will be "thrown" out, and the wet clothes become dry clothes.

The force that throws water out is the force generated by the water droplets leaving the center when they move in a circular motion, which is called centrifugal force. In the same way, when a rotating nebula shrinks and rotates, and the centrifugal force of the surrounding matter exceeds the centrifugal pull of the center on it, it separates a ring. And just like that, one ring after another was created.

Eventually, the central part becomes the sun, and the surrounding rings become planets, one of which is the Earth, which was created four or five billion years ago.

This is a scientific hypothesis, a doctrine put forward by the German philosopher Immanuel Kant and the French mathematician Laplace in the 18th century. In 1944, the German physicist Weizak developed this theory.

Research on the origin of the solar system and the formation of the Earth continues and continues to improve. Nevertheless, the earth is the mother of our humanity and nurtures us to grow up. We humans should know it, understand it, and even if one day, human beings move to other planets, we will always miss it.

You might think that the complex Earth is made up of an infinite number of different substances, but in fact it contains almost only four basic components, ferrosilicon magnesium, these four elements account for 93% of the earth's substance, and the rest is only a trace supplement, including calcium, aluminum, copper, and so on.