Why does most of the Earth s water not come from the oceans? Where did that come from?

The earth we live on is a planet surrounded by water, with only 30% of land and 70% of it occupied by water, while 97% of the water on Earth is all seawater from the ocean, and less than 3% of the fresh water available to humans is edible. It is conceivable that the world's water resources are now 10 points in shortage, and now mankind has faced a situation where everyone is not enough to use, and some areas have been seriously short of water. But most of the Earth's water does not come from the oceans, but from a few places.

1. Melting water from glaciers in the Arctic and Antarctica. First of all, in the northernmost and southernmost parts of the earth, these are the two extreme regions where perennial low temperatures are below minus 20 degrees. And there are abundant glaciers and snow in these two regions, probably millions of cubic meters of ice, so as the global temperature continues to rise, a glacier and ice and snow in the two regions are constantly melting to meet the abundance of water in the ocean.

Therefore, the water in the ocean is replenished by the meltwater of ice and snow from the polar regions. It is also these areas that are rich in glaciers and snow and ice, which can meet the needs of the ocean at any time. <>

2. Supply of land, mountains and rivers. Secondly, another estimate is that there is a supply of water from many rivers, there are many major rivers in the world, such as the Yangtze River and the Yellow River in China, the Mississippi River in the United States, the Amazon River in Brazil, and the Nile River in Africa. These are rivers that carry a lot of water, and these rivers carry millions of cubic meters of water into the ocean every year.

As you can imagine, these rivers provide an ample replenishment to the ocean. <>

3. Replenishment of precipitation in the ocean. The last condition is that in the ocean, there is also the possibility of violent storms and rains on the surface of the ocean to replenish its own water. Because of the accumulation of clouds, as long as there is a certain amount of water vapor, it will form rain clouds after reaching the clouds, and it is easy to form in the ocean.

I think there was no water on the earth originally, but there were many meteorites that landed on the earth tens of thousands of years ago, and some meteorites were made up of ice cubes, and those ice cubes melted and formed the water resources on the earth today.

Some of the melting of glaciers at the poles is more dependent on the natural water cycle, the water exposed to the sun turns into water vapor, and then through the rainfall to form rivers, rivers and lakes return to us, and so on!

Because the ocean water is salty and unsuitable for human life, the water that humans drink on the earth comes from the cycle of groundwater and rainwater, and then it is processed and filtered before it can be used in the daily life of human beings.

"Nowadays, mainstream scientists believe that the water on Earth may be composed of water brought by the Earth and water sent by asteroid impacts, which exists on the surface of the Earth in liquid form under suitable temperature conditions, forming a primordial ocean. The Origin of the Ocean Although the ocean appeared early in the formation of the earth, the composition of the ocean, and the size of the ocean, are not fixed. The composition of the oceans can change at different times, because the water in the oceans will evaporate into the atmosphere, and the water vapor in the atmosphere will condense into rain and fall to the earth's surface.

It comes from outside the Earth, and may also be carried by comets or asteroids. Because the water vapor on the surface of the earth is accumulating more and more, clouds are formed, and finally raindrops fall.

No one can say what these waters are, and the formation of the oceans is mainly based on changes in the weather.

As we all know, our planet is a planet surrounded by water. It is a planet, and it is better to say that it is a water balloon. This is because the oceans cover more than 70 percent of the Earth's area. Later, some people showed why the original name of the earth was earth instead of water ball.

This actually reflects the understanding of the earth and water balloon. It's not that when a planet is 70 or even 80 oceans, then the planet should be called a water ball. What is a real salary star? I'm sure you're curious too, so we'll move on**.

Many scientists have given the model of the omen. I believe that in our impression, Mercury is not made up of oceans. It's an endless ocean and deep sea.

For example, our planet's Shanghai Ocean may be only a few kilometers, but the depth of the Shanghai Ocean is several kilometers, which sounds like an insufficient gap. Scientists also believe that water balloons are actually very common in the universe. At first, scientists thought that a thick atmosphere might have a water-storing environment.

But now, scientists say, when the planet is two to four times the diameter of the Earth's sand, it is enough to store water!

However, these oceans are not necessarily liquid, they can be solid, such as Neptune in the solar system, the partition and Pluto, and many other planets are considered water by scientists, but they are almost solid. It's just that these planets are too far away from their host star. Therefore, it cannot be presented in the form of liquid water.

Why was there any life born on these planets? Perhaps this is why the Earth can be a special planet in the solar system and the Milky Way. It is impossible to say that there is a planet of water.

Perhaps the conditions on this planet are very bad, such as the absence of a thick atmosphere, the absence of an atmosphere such as oxygen such as magnetic fields, so why have humans not yet found extraterrestrial life in the Milky Way?

But it is clear that there is a water balloon in the Milky Way. It also gives the earth a lot of opportunities. Look for extraterrestrial life, because these planets are not suitable for breeding life, which does not mean that this planet will exist over time in the form of aquatic planets.

For example, when our planet had 4.6 billion, it gradually became a fertile planet. Living Planet!

Because the thickness of water on the earth is only one thousandth of the diameter of the earth. Suppose a ball is 25 centimeters in diameter, stained with a layer of water on the surface, and the thickness of the water layer is millimeters, you can't call the ball a water ball.

Because human beings were born on land and have always lived on the ground, it was named Earth.

This is because the earth was first named by the ancients, when human knowledge had not yet reached this height, and there were limitations in cognition, and labor was mainly carried out on land, so they did not know that the area of the ocean was larger.

Although the ocean is larger, we still use to call it the earth because the environment we live in is mainly land.

I think it's possible that this water will evaporate deep in the earth and return to the surface as water vapor, or it may connect with a trench in the depths of the ocean and flow back to the sea.

This seawater flows into the interior of the earth, collects into groundwater, and sometimes flows back to the surface, which is a cyclical process.

The water did not disappear, but returned to the sea in another form. For example, in volcanic eruptions, magma is actually another form of water. In addition, although the water flows into the interior of the earth, it still evaporates back into the atmosphere.

All this water is in the interior of the earth, so some of it is also evaporated. So you can say that there can be a small part left, and as for those that are gone, it's a process.

It may have gone elsewhere through underground rivers, and eventually flowed back to the surface to evaporate, enter the air, and then fall back to the surface as the rain falls back to form a cycle.

This water eventually enters the center of the earth, and only when the earth needs it most does it seep out for human use.

With evaporation, the ecosystem repeats its cycle, returning to land, and from land to sea.

I don't know if you have some curiosity about the earth, especially for the water on the earth is from the **, the earth can be said to be a very rich water resources of the earth, the earth's primeval ocean is very large, almost all living things are bred by the primordial ocean, so such rich water resources are obtained from the **? <>

As the saying goes, you don't see the water of the Yellow River coming up from the sky, rushing to the sea and not returning, this poem I believe everyone is very familiar with, then the earth's water resources are not poured from the sky, but because of the nebula generally recognized by the scientific community, such abundant water resources on the earth are due to a large number of gases and dust floating in the solar system, which are diffused to a certain extent, and the long-term reaction leads to the formation of water resources formed by the combination of some substances, especially hydrogen and oxygen are the two most abundant atoms in the universe. In the process of formation for millions of years, these substances combine with each other to form abundant water resources under special circumstances, and I believe that everyone understands the chemical formula, so this statement is a concept recognized by most people in the scientific community. Some scientists believe that some water resources may be formed by some large comets and meteors hitting the earth, and scientists have found that some meteorites not only contain a certain amount of water through the analysis and judgment of various materials formed after the birth of the solar system. <>

So such abundant water resources have been understood to a certain extent, the primitive ocean on the earth is only about one-tenth of the current ocean area, because the sea water at that time, due to frequent volcanic eruptions and the harsh environment, resulting in the content of sea water is not huge, especially with the continuous passage of time, the impact and extrusion of various plates between the earth have formed a variety of terrain, most of the surface of the primordial ocean in ancient times is high mountains, basins, At that time, most of the primordial oceans were liquid water left over from the cooling of the atmosphere, including the mixture of water vapor and dust gases volatilized from the rocks, which slowly formed the primordial oceans that existed on the earth. <>

Water on Earth is formed by the condensation of water in the atmosphere to the ground, continuously released into the atmosphere and descended to the surface, and collected in low-lying places on the surface. The Earth's pristine oceans cover about 79% of the Earth's entire planet, which is much larger than the land area.

For water on Earth in general, it is an asteroid, and the associated comet hits the Earth and thus comes; For the Earth's primordial oceans, it covers an area of about 100 million square kilometers.

For a long time, it was believed that seawater was inherent in the earth. When the Earth condensed from the primordial solar nebula, it carried this part of the water. At first they were found in minerals and rocks in the form of structured water, crystalline water, etc.

This claim of "primary water" has no scientific basis and cannot be found, because isotope studies of this so-called "primary water" have found that they are composed of isotopes that closely resemble surface water, which proves that they are nothing more than surface water that penetrates into the ground and then recirculates to the surface.

So, where does the water on Earth come from? Many researchers believe that it came from the sky, from falling ice meteorites.

American scientist Frank was the first to discover that ice meteorites are attacking the Earth almost every moment. When he studied thousands of radiation maps of the Earth's atmosphere sent back from satellites between 1981 and 1986, he found that there were always small black dots on them, each of which lasted two or three minutes. He believes that the small black dots are caused by some ice balls that have crashed into the earth, and that they are the shadow left by their melting into water vapor.

Based on the size and frequency of these small black dots, he speculated that about 20 ice balls fall on Earth every minute, with an average diameter of about 10 meters, each of which can melt into 100 tons of water. In other words, the earth can get 1 billion tons of water from this ice hockey ball in one year. Since the Earth is 4.6 billion years old, it can get 46 billion tons of water from ice hockey.

In other words, there is three times as much water on the planet as there is 14.5 billion tons. Based on this, he concluded that the water that now covers the earth's surface3 4 was melted by ice hockey balls. He also speculated that millions of years from now, the size of the ocean will expand and the amount of water will increase as the ice pucks continue to fall.

But there are also scientists who are convinced that water is intrinsic to the earth. They point out that while there is evidence that volcanic vapor and hydrothermal water come mainly from the surface water cycle, it is important to rule out the possibility that there may be a small amount of real "primary water" mixed with, and that if the Earth's water vapour has been released in the past as much as it is now emitted by volcanic activity, the cumulative amount over billions of years would be 100 times the total volume of the Earth's atmosphere and oceans today. So they believe that the volcanic steam and hot spring water99 is the water that is constantly circulating,1 and it is the "primary water" from the earth's mantle, and it is this part of the water that makes up the real ** of the seawater.

It seems that there is a big difference of opinion between the "Heavenly School" and the "Earth School", and it is up to the scientists to solve this mystery as soon as possible.