How the Earth Came to Shape in the Children s Nature Knowledge Series

Do you know how the earth is formed?

The home we live in is called the earth. She is the only planet discovered so far that nurtures and supports life. Do you know her?

Earth is the third planet from the Sun and the only known object that hosts and supports life. About 29.2 percent of the Earth's surface is land made up of continents and islands. The rest is covered with water.

After the "Encyclopedia" talks about the general content of the earth, let's talk about its formation.

Because 100 years ago, a large particle of cooling dust was formed in the universe, and these particles gathered together to form a large disk, and many rings were thrown out behind it, and at the same time, the particles reached a white-hot level, and the middle became the sun. About 4,05 billion years ago, eight planets were formed. This is the famous nebula theory that is the most plausible theory for the birth of the solar system.

That's what scholars think about the formation of the earth. The collisional accretion of matter in the nebula disk evolved into the primordial Earth. The temperature of the earth gradually decreases, and the internal material becomes differentiated.

The dense material gradually gathers to the center of the earth and forms the core; The less dense material concentrates upwards to form the mantle and crust.

Next, let's talk about the evolution of living things. Biological evolution goes through a process from low to high, from simple to complex. The distribution space has undergone a process of expansion from the sea to the land, some ancient organisms have died out, and new organisms have evolved and been born.

If you are interested in the universe and astronomy, you may wish to read Wang Jie's "The Strings of the Starry Sky". The content of this book is about the major discoveries of astronomy, and it is suitable for novices who want to enter astronomy. Very useful! (I only recommend it, and I do not use it for g

Hope it helps.

The formation of the earth, as follows:

1.The formation of the Earth began with the contraction of the solar nebula, and the interstellar dust material that was originally present in the nebula gas acted as a condensation nucleus. It will slowly absorb the scattered particles around it, and gradually increase its mass over time, at this time it will be called "stars", and then the accretion process will be more intense, and the stars will collide and fuse, and finally form a protoplanet, and then further evolve into planets, continuous accretion, continuous collision and fusion, and this is how the earth is formed.

2.Earth feels like a blue planet. The trees swayed in the breeze, the turquoise waves crashed against the white sand grains on the beach, and the bubbles crashed into each other before disappearing.

The rough seas and winding mountains, which take on different colors such as green, white, and brown, bring us peace of mind. Then, thanks to human efforts, huge domes, sacred churches, and skyscrapers surrounded by glass reached into the sky. People drive all kinds of cars, buses, trains, and follow pre-planned routes towards their goals.

The station and the streets are full of bustling people. That's what life is all about.

3.The Earth is the third closest planet to the Sun, and it is the only known object that can produce and sustain life. About the surface of the earth is land and islands.

The rest is covered by water, mostly by oceans, bays, and other salty waters, as well as lakes, rivers, and other freshwaters, which are made up of these bodies of water. Most of the polar regions of the planet are snow and ice. The Earth's outer layers are divided into hard plates that have been moving on the surface over millions of years, but are still active inside.

Earth. It is the light radiation of the sun in the process of growth.

Mercury was first formed in the third radiation belt.

The Earth was created by the decomposition of mineral rocks in Mercury by the action of sunlight radiation.

So. The earth is made of water.

When the ball of rock in Mercury expands and cracks.

The part that protrudes the surface of the water is the land, which announces the formation of the earth.

It is not difficult to see from the degree of soilization of the earth's rocks.

China's Loess Plateau is undoubtedly the first land to stand out from the water.

So. It was also the Loess Plateau that produced the earliest people.

It was they who created human civilization in the first place.

According to the nebula hypothesis of the formation of the solar system, the Earth was formed at about the same time as the other planets of the solar system.

The nebula hypothesis suggests that the solar system was formed by the gradual cooling and solidification of a swirling mass of hot gas. The evidence is that the orbits of the large planets are almost circular, and the orbital planes are close to the equatorial plane of the Sun. A similar situation exists in regular satellite systems.

In addition, almost all planets and satellites have the same rotation direction and revolution direction as the sun.

To put it simply, a large cloud of interstellar gas dust is disturbed by the gravitational field and begins to contract gravitationally, and then produces a rotational motion under the action of a weak lateral force (probably related to the Lorentz force), gradually becoming a discus shape with a thick and dense middle, and thinner and less dense towards the edges. Then, in the middle of the "discus", a star is formed that concentrates most of the mass of the interstellar cloud, which is the sun. In the outer cloud of dust, some agglomeration clumps of material with smaller masses gradually formed.

These mass mass of material collided with each other and accreted, the large absorbing the small, and gradually formed eight large planets, including the Earth.

Because these planets are all generated in the same dust cloud disk, they all "inherit" the rotational angular momentum of the dust cloud disk, so they all rotate in the same direction.

Scientists theorize that the Earth began as a red-hot ball of liquid material, mainly magma. Over time, the temperature of the earth's surface continues to drop, and a solid core gradually forms. The dense material moves towards the center of the earth, and the less dense material (rocks, etc.) floats on the surface of the earth, which forms a earth whose surface is mainly composed of rocks.

The earth is our home to humanity. The Earth was 4.5 billion years ago when the universe was slowly formed by small fragments. The first Earth was a surface with a lot of magma, and finally formed by the impact of hundreds of thousands of asteroids.

1.The horizon is arc-shaped;

2.Ships on the sea level always see the mast first and then the hull when they come from afar, proving that the earth is spherical;

3.During a solar eclipse or lunar eclipse, observing the moon, the solar eclipse always has a certain arc. Proof that the earth is round;

4 When a partial lunar eclipse occurs, the earth blocks a part of the daylight, so that the shadow of the earth is projected on the surface of the moon, just like looking at the earth in a mirror, so that we can see the shape of the earth's sphere.

First of all, if the earth is flat, then even if only one part of the earth's surface is an arc, the sea level on the arc should be flat, not arc. Only if the earth is a spherical line can the sea level on the arc also be arc. So it's doable.

Second, the projection of the Earth on the surface of the Moon during a lunar eclipse is not always formed in a fixed place on the Earth. But it is round at all times, so the surface of the earth should be round.

There is one more, such as climbing high and looking far away. If the earth is flat and there is nothing in the way, then it should be the same far no matter how high you look, but in fact, no matter where you are on the earth, you will be looking far away. So the earth is round, 1, and the simple proof is:

The earth is a huge sphere, people's understanding of the earth has gone through a long and difficult exploration process, and the phenomenon of life that can prove that the earth is spherical has sailing ships coming from afar, first see the mast, and then see the hull; the Earth's shadow at the time of a lunar eclipse; Climb high and look far away, etc

Therefore, the answer is: (1) When you see a sailing ship coming from afar on the seashore, you always see the mast first, and then the hull; (2) the shadow of the Earth during a lunar eclipse; (3) Climb high and look far away...1, in the distance of the sea first see the sail in the sight of the ship, 0, the formation of day and night, 0,

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.

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.