Why is there water on Earth? Why is there water on Earth?

Because the earth is the only planet with life, and water is the source of life.

Perceptions of the origin of water are still widely divided, and there are currently about 32 theories about the formation of water. Here are a few of the main doctrines. One theory is that there was a primitive nebula of H2O molecules in the initial matter before the formation of the Earth, similar to the meteorites that now have an average water content, and that the Earth descended to the Earth after its formation, thus giving the Earth water.

Another theory holds that the original elements (hydrogen and oxygen) that formed water were formed only after the formation of the earth. Hydrogen and oxygen are combined under suitable conditions. Hydroxyl (OH) is generated.

The hydroxyl group then undergoes complex changes to form water (H2O). The Dutch astronomer Ott believes that the main ** on Earth is the upper mantle of the lithosphere of the interior of our planet. Half of the lithosphere is made up of silicon, of which silicates and water.

These rocks are dehydrated at a certain temperature and under suitable conditions, such as volcanic eruptions, thus forming the Earth's water. American scholar John F. Kennedy and others believed that when the rock is completely mixed in melting, it contains 75% silicate and 25% water. In the early days of the Earth's formation, volcanic eruptions were frequent, which accelerated the formation of the Earth's water.

The earth's water is increasing due to the high temperatures in the earth's interior. In the study, there is data that the ocean level has risen in the last 1,000 years. However, the rapid rise of ocean levels in recent decades may be largely due to global warming.

The origin of life on Earth is closely related to the existence of water. It can be said that without water, there would be no human life and all other living things on this planet. Of all living organisms, the organisms with the greatest water content are considered human beings.

What do you drink when you don't have water?

Water, liquid, these are two concepts.

Let me start by talking about why there is water!

First of all, there are many planets with water, which is composed of hydrogen atoms and oxygen atoms. These two atoms exist a lot in the vast universe. Especially hydrogen atoms.

It is the basic atom at the beginning of the universe. Therefore, the odds of being present are high. Second, the generation of water is very simple, first of all, hydrogen and oxygen can be produced by burning at high temperatures.

The three elements of combustion. Combustibles, hydrogen, accelerants, oxygen. Yes, as long as there is high temperature, it can be generated.

This is also not uncommon in the universe. Therefore, it is not uncommon for the earth to have water. Even many planets are made up of water.

But water doesn't mean liquid! Because it can also be solid ice.

And when it comes to liquids, that's a different story. Because liquids require a specific temperature, high is a gas, low is a solid. This is difficult to control in the entire universe.

In the vast universe, the temperature ranges from -273 °C to tens of thousands of degrees, and water can only exist from 0 to 100 °C. That's how hard it is. It may be difficult to meet both conditions at the same time, both water and temperature.

Regards, little stool.

Most likely, it was brought by the impact of asteroids and comets on Earth. In particular, the comet's nucleus is mainly ice.

Because you always post water stickers here, there will naturally be more and more water on the earth.

The reason why there is water on the earth is that there are all living things such as humans. Personally, it's simple: water is part of the earth's structure. The composition of water is inseparable from hydrogen and oxygen, the irradiation of the sun, the gravitational pull of the moon, and the presence of minerals on the earth are the objective conditions for the formation of water.

Living planets are composed of solid and liquid states.

God says that water is the source of all things. The next day, there was water.

Because in the solar system, the orbit of the Earth is suitable for water to remain on the planet, and it is in the form of liquid water, which is neither frozen nor vaporized.

There is a hypothesis that the water on Earth is partly formed by the geological activity of the Earth, but most of it is obtained by comets chasing and falling on the Earth.

The earth's primary cables, oil and gas, water, etc., are all synthesized by geocentric electromagnetic energy.

Expertise must be answered by a professional.

The first hypothesis is that the water on Earth is superior to the primitive atmosphere. They speculate that the Earth's temperature must have been high in the early days of Earth's history. No liquid water exists on Earth.

Rather, water vapor and atmosphere are mixed together. Later, the earth slowly cooled, and the surface temperature dropped to the boiling point of water (i.e., Celsius.

100 degrees Celsius), gaseous water condenses into liquid water. They imagined that the amount of water vapor in the primordial atmosphere was so great that the process of changing from gaseous water to liquid water must have been long. In other words, after tens of thousands of years of uninterrupted rainfall, all the depressions on the earth's surface were filled with water, and primeval oceans were created.

Some scientists have also found the oldest sedimentary rocks on Earth, which are rocks formed by the action of flowing water. With sedimentary rocks, it is possible to prove the presence of water at that time. They instrumentally measured the age of the oldest sedimentary rocks at 3,538 billion years.

In other words, water appeared on the earth as far back as 3.8 billion years ago.

This kind of atmosphere ** said, there are shortcomings. Because some people speculate that since the earth was very hot in the early days of the earth's history, and there was a lot of water vapor in the air, why did this water vapor not escape into the universe outside the earth?

So there is another hypothesis - the theory of magma precipitation came into being. This hypothesis holds that most of the Earth's original water existed in the interior of the Earth in the form of rock crystalline water, or dissolved in magma. As the Earth evolves, the water in the Earth's interior escapes to the surface through volcanic eruptions and may also come out through magma intrusions.

At the surface of the Earth – below the Earth's crust is the mantle layer. A former Soviet scholar estimated that there is a total of 20 water stored in the mantle layer

x10 (24) grams. At present, only 13% of the water on the earth's surface is accounted for, and 87% of the water is preserved in the mantle, which is a reserve for constantly replenishing the surface water**. Some even estimate that volcanic eruptions alone currently bring 40 million to 50 million tons of water to the atmosphere every year.

The history of the earth is so long, and it is not a problem for water to precipitate from the ground to form huge bodies of water such as oceans.

Recently, another hypothesis has become very popular. They believe that the water on Earth comes from cosmic space. An important basis for this hypothesis was their discovery that many comets around Earth were originally made up of ice crystals.

There are thousands of comets in space, and they are constantly meeting the earth and entering the atmosphere. They estimate that about every minute, 20 small comets with an average diameter of 10 meters enter the atmosphere, each of which can be released.

100 tons of water. Although the number is not very large, the frequency is high and the time is long enough to form this huge body of water on the earth.

** of water on Earth.

According to estimates, 71 of the Earth's surface is covered by water, and the total amount of water is about 100 million cubic kilometers, which exists in the oceans.

One is a meteorite that falls on the earth, and the other is a water molecule formed by protons from the sun. However, American scientists have recently come up with an impressive new theory: Earth's water comes from comets made of ice in space.

Scientists have discovered that water on the Earth's surface is lost into space. This is because the water vapor molecules in the atmosphere are broken down into hydrogen atoms and oxygen atoms under the action of the sun's ultraviolet rays. When the hydrogen atoms reach the 80,100-kilometre gas-thin thermosphere, they move faster than the cosmic speed and disappear out of the atmosphere into space.

Scientists estimate that the amount of water that flies off the Earth's surface is roughly equal to the amount of water that enters the Earth's surface. But geoscientists have found that in 20,000 years, the water level of the world's oceans has risen by about 100 meters. As a result, the increasing amount of water on the earth's surface has become a mystery.

Until recently, scientists from a research team at the University of Iowa in the United States found that there were always small dark spots on disk-shaped images of the Earth from thousands of ultraviolet radiation images sent back by artificial satellites. Each small black spot is present for about 2 3 minutes and covers an area of about 2000 square kilometers. After analysis, the spots were caused by small comets made up of some invisible ice blocks that rushed into the Earth's atmosphere, rupturing and melting into water vapor.

Scientists estimate that about 20 small ice-like comets with an average diameter of 10 meters enter the Earth's atmosphere every minute, each releasing about 100 tons of water.

The Earth has been formed about 3.8 billion years ago, and these small comets are constantly supplying water that allows the Earth to form the water level it is today.

Because there is air on the earth, there are more than 30 theories about the formation of water on the earth, which can be roughly boiled down to two categories:

One is the native theory, and the other is the external theory. The primitive theory holds that the dust clouds of the universe condense into the earth, and with the rapid rotation of the earth, the water contained in the molten primordial material moves to the surface of the earth, and finally gradually releases it.

When the Earth's surface temperature drops.

When it is below 100 degrees Celsius, the vapor water condenses into rain and falls to the ground.

These processes occurred roughly 3.5 billion years ago. Externally, there are about two scenarios, one is that a large number of meteorites fall to the surface of the earth, thus bringing a steady stream of cosmic water. Another theory is that protons, the elementary particles that bring positive electricity from solar radiation, combine with electrons in the Earth's atmosphere to form hydrogen atoms, which are then atomized with oxygen to form water molecules. ”

Atmospheric water permeates everywhere above the ground; Oceans cover 71% of the Earth's surface. The land is dotted with rivers, lakes and swamps, snow and glaciers; There is an abundance of groundwater underground. These are collectively known as "bodies of water", and they form a circle that surrounds the Earth – the hydrosphere.

The various bodies of water that make up the hydrosphere are the stations of the water cycle. Various water bodies are affected by solar energy, and constantly carry out mutual conversion and periodic cycles. The water cycle between land and sea is usually called the large cycle, and the water vapor evaporated by the ocean condenses in the air and then falls back to the ocean in the form of precipitation, which is called the ocean small cycle. There is also part of the precipitation on the land surface on the land surface to form a water body, or intercepted by plants, through the transpiration of soil and vegetation, the water on the land surface directly returns to the atmosphere, and then condenses and returns to the land surface in the form of precipitation, this water cycle is called the land small cycle.

Water occupies an important position in the composition of various organisms, and organisms on land ingest water in various forms and return it to the atmosphere and ocean in the form of evaporation or excretion, which is an integral part of the terrestrial cycle.

Whereas, other galaxies do not have an atmosphere, so there is no water.

On the basis of matter: according to the content of the elements in the earth's crust, the content of each element in the earth's crust is oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium, and hydrogen in descending order. The percentages are:

Oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium, hydrogen, etc., the hydrogen and oxygen content that make up the water molecules are abundant, especially the oxygen content is abundant, so that hydrogen mostly exists in an oxidized state.

In terms of physical conditions: the distance from the sun is moderate, not too high but ionic or gaseous, or too low temperature of the solid state.

Formation process: There is no conclusive conclusion so far, and there are two common views:

1. Water on Earth appeared about 40-3.6 billion years ago, when the Earth was still in the formative stage and was constantly being hit by thousands of large and small comets and meteorites. Scientists believe that many of these asteroids that crashed into Earth contain abundant water resources, including steam, liquid water and ice.

2. In the initial stages of the earth's formation, it contained a very rich element of hydrogen, which later reacted with oxygen in the mantle and eventually formed water.

Water is ubiquitous in the universe, such as in interstellar gas clouds. To this day, there are still many comets in the cold outer outer part of the solar system, and these comets are the remaining material that makes up the solar system, which is composed of a large amount of water ice and a small amount of dry ice and solid particles. That's why comets are also called dirty snowballs.

Earth, like all planets in the solar system, formed in clouds of interstellar gas, so when Earth (and other planets) formed, there was water. It's just that on rocky planets that are relatively close to the Sun, such as Mercury, Venus, Mars, etc., water is evaporated or decomposed due to strong solar radiation. On Earth, the atmosphere is thicker, and the water does not have time to completely decompose, but remains on Earth.

In addition, the earth gave birth to life and evolved photosynthesis. Photosynthesis absorbs carbon dioxide and releases oxygen, which forms an ozone layer in the upper atmosphere under sunlight, preventing the radiation in sunlight that can decompose water, and water remains on the earth permanently. It can be said that if there was no life on the earth, without the photosynthesis of plants, there would be no ozone layer and there would not be so much water.

Scientists say that part of the water on Earth was present when the Earth was formed, and part of it was brought by small water-rich bodies such as comets when they hit the Earth.

There is also a lot of water on Jupiter, Saturn, Uranus, and Neptune, where the atmosphere is thicker. Of course, most of the water on these planets is in the form of ice.