Why does the earth have so much water? Solar System Comet Landing or Earth Intrinsic? where does the water come from

Humans live on the vast earth, according to scientists' detection of the surface waters and land areas of the earth. At present, the surface water area accounts for 71% of the earth, and the land area on which daily life stands is only about 29%.

The earth belongs to a planet in the solar system. Compared with other planets, the earth and the sun seem to have a special relationship. On many planets centered on the sun, not all have surface water like Earth does. There is so much water on the earth, where does this water come from?

Regarding the source of water on the earth, in fact, according to the current research findings, no definite results have been obtained. However, in the analysis of many sources, there are mainly two directions that are more acceptable. The first is that these numerous water molecules escaped from the solar system, and the second is that they come from the earth itself.

According to speculation, 5 billion years ago, the sun was finally formed in the universe after the evolution from the primordial nebula. At that time, the sun did not have so many planets revolving around it. Take the earth as an example. About 4.6 billion years ago, the earth that provided many human beings with living places finally began to form. The formation of the earth is a long process, and it takes a long time for the emergence and continuous evolution of creatures on the earth.

About 3.5 billion years ago, primitive life began to exist on the earth. From the point of view of the origin of primitive organisms, more people agree that it emerged from the ocean. The vast ocean is enough to provide these low-level creatures with sufficient resources and environment. They have gradually evolved, whether it is microbes that are difficult to observe with the naked eye, or after the age of huge dinosaurs, they have finally evolved to this day.

Therefore, this also means that in the early days of the formation of the earth, the earth already had a large amount of water. From the perspective of the large space of the entire solar system, the earth is likely to be formed due to the continuous accumulation of many small comets being hit. In the process of growing from small to large, the size of the earth is gradually expanding.

Naturally, the water on the earth comes from these asteroids that flew from outer space, including from the current point of view, meteorites from the universe often land on the earth. There is water on many small planets, and when they are thrown to the earth, the water contained in the interior does not disappear.

However, in terms of the area of ​​the earth's waters, the Pacific Ocean, the Atlantic Ocean, the Arctic Ocean and the Indian Ocean account for a large proportion of the earth. On the surface of the Earth, water exists mainly in liquid form, but relative to the thick ice floes that even appear in the Arctic Ocean, it also shows that the form of water existence is affected by temperature.

On the surface of Neptune, it is believed that some ice crystals are also present. However, compared to planets such as Mercury and Venus, no surface water has been found.

Therefore, some people will speculate based on the distance from the sun, that planets that are closer to the sun will be affected by the high temperature of the sun, and the water on the surface will also be evaporated. Even if there is water, it is hidden in the internal components.

The location of the earth, according to the distance of the eight main planets of the solar system from the sun, can be said to be slightly closer. Only Mercury and Venus are closer to the Sun than Earth, while Mars, Jupiter, Saturn, Uranus and Neptune are getting farther and farther. Although Jupiter is the largest planet in the solar system, according to the survey, the earth is the only sphere with life in the solar system.

Since no water has been found on Mercury and Venus, it is likely that the water evaporates due to their proximity to the sun. On Earth, most of the water that exists is pooled in the four oceans in liquid form. However, according to geologists' predictions, during the last 20,000 years, the overall water level of the earth's oceans has been on an upward trend. Even in tens of thousands of years, it can rise hundreds of meters.

But planets falling from outer space did not carry more water. So why does the water level in the ocean keep rising? In fact, it may be easier to understand from the perspective of solar evaporation.

Unlike the moon, the earth is surrounded by an atmosphere on the outside of the earth, and the liquid water evaporated by the sun forms water vapor, and the water vapor will continue to accumulate, leaving the surface of the earth and rising to a certain height, so this will make the earth liquid water is lost. But we know that the overall water is in a state of circulation, including ice floes and snow, which will directly lead to sea level rise after they are melted away.

From a chemical point of view, since water molecules are composed of two hydrogen atoms and one oxygen atom, pure water, as a pure substance, belongs to the scope of compounds. In a specific reaction, the generation of water requires that the substance carrying the two elements of hydrogen and oxygen meet the conditions before it appears as a product.

The most abundant element in the universe is hydrogen. Therefore, if water is synthesized, the main consideration in space is the presence of oxygen. In the fusion reactions of some stars, oxygen may belong to their products. While releasing energy, it will also create opportunities for the combination of hydrogen and oxygen elements.

Many people believe that the solar wind is responsible for the existence of many atomic nuclei. When they hit electrons in the atmosphere, they become oxygen and hydrogen atoms, which then chemically react to become water. For the solar wind, it is some supersonic charged ions emitted by the atmosphere, similar to the high-speed motion of the stellar wind, which will promote the interaction of protons and electrons.

Another source of water is from the interior of the earth. In more than half of the global seas, the depth of the ocean is more than 3km, which also shows that the water on the earth is not convincing if it comes from the fall of asteroids in outer space.

After the formation of the earth, oceans also began to appear. Therefore, the first water on the earth may belong to the interior of the earth. Conditions like volcanic eruptions and earthquakes, for example, can cause changes in the water inside the Earth.

The high temperature generated by the volcanic eruption will evaporate the liquid water inside the earth, and after gathering to a certain extent, it will fall with the rain. Or under the influence of cold air, gaseous water becomes liquid and eventually flows into the vast ocean.

In order to study the existence of liquid water, some scientists have even probed the volcanic rock samples that have existed on the earth for many years and the magma components that appeared after the crustal changes, and found that they also contain hydrogen in their interiors. And according to the different atomic weights, these isotopes can also combine with oxygen to generate water on Earth.

Therefore, when the earth began to appear, the water present in the interior of the earth can be said to have played a very important role. It not only creates a source of living environment for the creatures in the ocean in the initial stage, but also satisfies the supply of energy and development of the earth itself.

Because the earth is surrounded by an atmosphere, even if some of the water is evaporated, it will return to the earth in various forms within a certain time frame. The cycle of water is also one of the essential conditions for life on earth to meet the living environment.

Conclusion: Where does the water on earth come from? The source of the earth's water has been discussed for a long time. Water is an important substance. It can be said that water affects all living things on the earth. But since the Earth was formed, the water on Earth may have already existed.

This is a question worth exploring, at least from the current situation, human beings have put forward many kinds of guesses, and are in the process of implementing demonstrations of these conjectures. When it comes to scientific research, the source of water's emergence is curious. It may be some small planets that carry water, or stars directly made of ice that continuously descend and accumulate on the earth. It may appear because of the existence of the solar wind and participate in specific chemical reactions, or it may be because in the interior of the earth, Moisture is already there.