Shulou(Shulou.com)11/24 Report--

I saw a question on a question-and-answer platform: "the temperature in the interior of the earth is as high as 6000 degrees Celsius, why can't people feel it?"

The sun is a big fireball with an average surface temperature of about 5500 ℃. Judging from the data alone, the temperature in the core of the earth is as high as 6000 degrees Celsius, which is indeed higher than the temperature on the surface of the sun.

Is it true that the source Pexels can't feel it? In fact, the temperature in the interior of the earth is so high that human beings can feel it indirectly and in many ways.

The hot water in the hot spring is formed by the upwelling of groundwater heated by geothermal heat. The heat from the interior of the earth is an almost inexhaustible geothermal energy, which can be used not only for heating, but also for power generation.

In addition, when a volcano erupts, a large amount of molten magma gushes out of the cracks, which is also a good indication of the high temperature in the interior of the earth. Imagine how the rock could have melted without a temperature of thousands of degrees. The data show that the closer to the center of the earth, the higher the underground temperature. At present, the highest human drilling record has reached more than 10,000 meters underground, and the data show that the temperature at 10,000 meters underground is about hundreds of degrees Celsius.

According to the research of scientists, the interior of the earth can be divided into three layers, the crust, the mantle and the core from the outside to the inside. Among them, the earth's core can be divided into foreign core and mainland core. The so-called core region of the earth with a temperature of 6000 degrees Celsius refers to the inner core.

Scientists believe that the earth's core is mainly made up of metals such as iron and nickel, of which the metal in the outer core is liquid, while the metal in the inland core exists in solid form. The temperature of the inland core is higher than that of the foreign core, but the metal there has not melted. This is because the inland core is located in the central region of the earth, where the material is under great pressure, about 3 million standard atmospheric pressure. This makes the material there can only exist in solid form.

Another friend asked, "since the temperature of the core is higher than the surface of the sun, why didn't the earth melt?"

At present, the material with the highest melting point known in the world is not tungsten, but a compound of hafnium: tetratantalum and hafnium pentocarbide (Ta4HfC5), which has a melting point as high as 4215 degrees Celsius. But the substance is still unable to withstand the high temperatures on the surface of the sun, in which case it is heated and converted into hot plasma almost instantly.

The core of the earth is hotter than the surface of the sun, and there is no matter on earth that can bear it, but the reason why the earth does not melt is because whether the earth will be melted has something to do with heat as well as temperature.

A cup of 100 degrees Celsius water is poured into the Pacific Ocean, and the Pacific Ocean will not boil! Even if the temperature at the core is as high as 10,000 degrees Celsius, the earth will not be melted, because the heat in the interior of the earth is far from enough to melt it.

In fact, at the beginning of the birth of the earth, it was as if the earth had been melted. There was no liquid water or solid surface on the whole surface of the earth. The whole earth was completely in a state of melting. After an extremely long period of time, the temperature of the rocks on the earth's surface gradually decreased, and finally formed a solid surface. In this process, the heavy metals settle into the interior of the earth, and eventually form the metal core of the interior of the earth.

Nearly 4.6 billion years have passed since the birth of Tuyuan Pexels Earth, and the interior is still able to maintain a temperature of 5, 000 to 6, 000 degrees Celsius. On the one hand, it is because the thick layer of rock outside the earth wraps the core like a sweater, preventing the loss of heat; on the other hand, it is because there are a lot of radioactive elements in the interior of the earth, such as uranium and thorium, which release heat through decay and provide a continuous supply of heat to the interior of the earth, thus keeping the interior of the earth hot for billions of years.

According to scientists' predictions, the earth's core will not cool down any time soon. We should be pleased with this result, because once the earth's core cools, the earth's magnetic field is likely to weaken or even disappear. The earth's magnetic field plays a very important role in protecting life on earth and can reduce the impact of solar wind on life on the earth's surface.

At present, the average temperature on the earth's surface is about 15 degrees Celsius. In fact, the heat in the interior of the earth is wrapped in the interior of the earth, which basically does not affect the average temperature of the earth's surface.

It should be noted here that human beings do not have a comprehensive understanding of the earth's interior at present, and the relevant data are mainly obtained through the detection of seismic waves and speculations based on theoretical models. In other words, the temperature and form of matter in different layers of the earth's interior can only be estimated roughly, which may not be accurate.

This article comes from the official account of Wechat: scientific exploratory bacteria (ID:kxtsj9405). Author: Nansha startled Dream.

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