How did the earth come to be? How was the Earth formed?

The other two said it well! Thermal support!

The earth's surface is composed of mountains, plateaus, plains, and other diverse terrain and landforms, and the topography of the surface is constantly changing. The movement of the Earth's interior and the action of external forces are the main reasons for the formation and reshaping of various topography on the Earth's surface.

The effects of external forces on the surface of the earth are weathering, erosion, sedimentation, etc. Weathering and erosion gradually cut off the raised areas of the earth's surface, while sedimentation gradually fills in the low-lying areas.

Weathering and the action of living organisms can make rocks end up turning into soil. Soils contain weathered rocks of different sizes (pebbles, sand, clay), humus, water, air, etc. Soil is closely related to human production, life and the survival of living organisms.

In the process of changing the surface topography, internal and external forces sometimes cause natural disasters to human beings, and the impact of natural disasters will be exacerbated by inappropriate human activities.

It was good and also helped me with my essay.

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.

As for the origin of the earth, there are already rigorous theories in science, which believe that the earth was born from the primordial clouds of the solar system 5 billion years ago, and after the formation of the sun, some residual materials were gathered.

Historically, there have been many hypotheses about the origin of the earth, for example, the French scientist Laplace, in his works "Theory of the Cosmic System" and "Celestial Mechanics" in the eighteenth century, proposed that the solar system was formed by a nebula, and the nebula gradually gathered into stars and planets due to gravitation.

At the beginning of the nineteenth century, the famous British scientist Kelvin speculated that the earth was born as a mass of high-temperature lava according to Laplace's nebula, and then cooled for a long time to become what it is now; Kelvin even calculated the time it would take for the Earth to cool from hot lava to its present moment based on thermodynamic principles, about 400 million years, in order to estimate the age of the Earth, which is actually wrong.

Modern astronomy holds that 5 billion years ago, the solar system was a primitive nebula, which came from a more distant supernova explosion that provided the primordial nebula of the solar system with abundant heavy elements.

Then after hundreds of millions of years of evolution, the primordial nebula began to gather under the action of gravity and maintained a certain angular momentum, and in the center of the nebula, our sun was formed, and our sun was born in 100 million years.

Then the remnants of the material orbited the sun, gathered in different orbits to form different planets, according to the nature of uranium decay into lead, scientists found special rocks to study its uranium and lead content, and speculated that the age of the earth is 100 million years.

Soon after the formation of the earth, it captured its own satellite - the moon, more than 3 billion years ago, the first single-celled organisms such as green algae appeared on the earth, these single-celled organisms gradually changed the earth's atmospheric environment, in the Cambrian period 500 million years ago, the earth had the first biological explosion event, since then the earth's life flourished until the emergence of human beings.

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.

To put it simply, the formation of the earth began with the contraction of the solar nebula, and the interstellar dust material (mainly ice and rock, with a diameter of about millimeters) that originally existed in the nebula gas acted as a condensation nucleus, which slowly absorbed the particles scattered around it, and gradually increased its mass over time, at this time it was called "star", and then the accretion process was more intense, and the stars would collide and fuse, and finally form a protoplanet, and then further evolve into planets, continuous accretion, Constant collision and fusion, this is how the earth was formed. I hope my answer is helpful to you

Question: How great is the earth! Thank you

Because the formation of the earth is inseparable from the sun, it may be that the sun has found the earth that follows it, there is the moon, there is a division of day and night on the earth, and slowly there will be the growth of living plants.

The material that formed the primitive Earth was mainly the primordial material of the nebula disk, the main components of which were hydrogen and helium, which accounted for 98% of the total mass. Then there is solid dust, and material thrown out by the Sun's early shrinkage evolution.

The Earth is a member of the solar system, and geologists believe that the Earth was formed 4.6 billion years ago because a large amount of material was quickly condensed together, and the Earth was formed when the sun began to shine and heat.

It is a single rock that slowly grows by absorbing cosmic fragments such as sand and rocks or mountains over the years to form the earth's crust. The flow of the earth's mantle causes tectonic plate movements, producing mountains and volcanoes and large amounts of gas and water vapor, which combine to produce rain.

The formation of the earth is due to the fact that the particles produced when the universe is large and converge into a planet, which is the earth.