Earth History

EARTH HISTORY

Earth history

The history of the earth is calculated after the earth is made up of parts of the primitive solar nebula. Scientists estimate that it is between 4.6 billion and 5 billion years. And because it is difficult to express such a long time, the history of the earth can be simulated as twenty-four hours (the time when the earth is formed is set to zero in the morning, and this time is now at zero in the morning of the next day), about every second represents In 53,000 years, the time of the Big Bang and the formation of the universe was about 13.7 billion years ago. In terms of simulation time, it was about three days ago, that is, two days before the birth of the earth.

ORIGIN

The earth is a planet, with the birth of the solar system. When the solar system was born, it existed in the form of huge and constantly rotating clouds of dust and gas. It is composed of hydrogen and helium generated by the Big Bang, and also has other elements synthesized inside the planet a long time ago. 15 to 30 minutes before the birth of the earth (equivalent to about 4.6 billion years ago), a nearby star may have formed a supernova explosion, sending a shock wave to the solar nebula and shrinking it. As the cloud collapses, the temperature rises, the rotation accelerates and flattens. As the cloud rotates, gravity and inertia press the cloud into a circular dish, perpendicular to its axis of rotation. Most of the mass is concentrated in the center and heating begins. At the same time, the gravitational force caused the matter to shrink around the dust particles, causing the rest of the disc to begin to break down into rings. The small fragments collide with each other and form larger fragments.The Earth's matter is composed of about 150 million kilometers from the center. When the sun shrinks and is heated, nuclear fusion begins, and the resulting solar wind clears most of the material in the disc that has not shrunk and composed of larger individuals, leaving only a few elements. Afterwards, the heavier elements gathered near the sun to form small, dense stars (terrestrial planets); the lighter elements gathered farther away from the sun to form large, lower-density stars (Jupiter), and the earth is the third closest planet to the sun

Moon Formation

The origin of the moon is still widely divided, but the supporting evidence of the big collision theory is the most. The earth may not be the only planet created 150 million kilometers from the sun.scientists hypothesized that another primitive planet was formed 150 million kilometers from the sun and the earth, at the fourth or fifth Lagrangian point. This planet is named Thea, and it is assumed to be smaller than the current Earth, about the size and mass of Mars. Its orbit should be relatively stable at the beginning, but then it was disturbed by the increasing mass of the earth. Theia began to turn around and move closer to the earth, and finally collided with the earth at a low angle at about 0:11 am (about 4.53 billion years ago) of the hypothetical clock. Its low speed and low angle are not enough to destroy the earth, but enough to cause most of the crust to be ejected. The heavy metals that make up for Theia sink into the earth's core, while the remaining material and ejection condense into an independent entity within a few weeks. Under the influence of its own gravity, within a year, it becomes a more spherical entity, that is, the moon. It is also believed that this impact tilted the earth's rotation axis by 23.5 °, which made the earth appear in four seasons (a simple, perfect star should be a season in which the rotation axis is not tilted and there is no distinct season). It may also accelerate the rotation speed of the earth and cause plate tectonics on the earth.

Crustal Formation

The Earth's early atmosphere included material in the solar nebula surrounding it, especially lighter gases such as hydrogen and helium, but the solar wind and the heat of the earth itself emptied this atmosphere. The surface of the earth slowly condensed, forming a solid crust at 0:47 (4.45 billion years ago) at (approximately a hypothetical clock).

At about 3 to 4 am (4 billion to 3.8 billion years ago), assuming a clock, the Earth experienced a period of heavy star impact. Steam escaped from the crust, and more gas was released from the volcano, forming a second atmosphere. This new atmosphere may contain ammonia, methane, water vapor, carbon dioxide, nitrogen, and other lesser gases. Oxygen is bound by hydrogen or minerals on the surface. Volcanic activity occurs frequently, and because there is no ozone layer protection, a large amount of ultraviolet rays shine on the surface of the earth. More water is brought when the fire meteor hits the earth.

Ocean Formation

This was 3.8 billion years ago, when the earth began to cool and the temperature of the atmosphere dropped, forming a torrential rain that lasted for millions of years. All the water pooled to form the ocean (recent evidence suggests that the ocean may have formed 4.2 billion years ago, ie this entry assumes 1:50 am of the clock)