In terms of size, the Earth looks very modest. Even among the closest space neighbors in the solar system, according to this indicator, it is “average”, not even included in the top three “leaders” – the fourth out of eight. However, the uniqueness of our planet is not in its mass, and not in the extremely high intensity of the core. The Earth is an ecosystem that has reached the very pores of the first week to us, which has become the cradle of civilization.
The shape of the Earth is close to a ball – the equatorial and polar diameters are 12754 and 12711 kilometers, respectively. It was very difficult for me to be poor in the middle, and I was born in “puff fire” on three days in other layers – the earth’s crust (at 75 km), the mantle (the first 2800 km) and the core. In turn, the earth’s core consists of outer and inner cores, respectively 2300 and 1200 km.
However, the “solid” Earth has a continuation, without which it would never have become the Earth that we know – leaving in any atmosphere.
This is also, in fact, a “layer cake”, only already heavenly. The lower part of the atmosphere (the first 20 km) is the troposphere. Above (from 50 km) is the stratosphere. Having risen to 30 km, my eyes were in the mesosphere – the “dressing room” of near space. Near space – the thermosphere extends at an altitude of 80 to 700 km. The distance to the boundary of the earth’s atmosphere-exosphere exceeds 10,000 km.
The history of the discovery of the earth’s core
The most interesting scientific research has become the property of the Earth. The discovery of the hypothesis about its composition by the German geophysicist Emil Wiechert in 1897.
In the course of research, he came to the outlier that the Earth consists of many layers, due to the difference between the density of formation of layers and the average density of the Earth.
Almost 30 years later, the French geophysicist Benoit de Librize, based on measurements of earthquake parameters recorded at a distance of 800 km from the epicenter, noticed that this distance of seismic waves passes through the Earth somewhat faster than the initial assumptions, from which he concluded that deep in the bowels of the Earth there are a layer is formed that accelerates the propagation of waves.
Later, Libreese’s colleague British geophysicist David PyPS discovered the Z-wave passing through solid and liquid media, including the Earth’s core.
Why is the earth’s core solid?
As a result of scientific research, it was possible to establish the temperature of the Earth’s core – from 5427 to 5927 ° C. First of all, it is low temperature in bad sunlight (5500 °C) and cold. The reason for this “lag” is in dark spots on the Sun, where the plasma temperature is “only” 3727 ° C.
Steel is also known and the composition of the inner core of the earth, which is an alloy of iron and nickel. For this reason, he was a mystery, because of the temperatures – the hottest sun – the darkest sun. For reference: the melting point of iron is 1538 and nickel is 1453 °C.
Why is this happening? The fact is that the center of the Earth is an infected reactor, where its concentration is under the “ghost” of the giant Ogo, the extreme pressure is 350 gigapascals or 3.5 million atmospheres. It is it that stabilizes the crystal lattice of the iron-nickel core and uses hardness. Unlike the inner core, the Earth’s outer core is liquid.
Why is the Earth’s core hot?
Recent experiments nuclear physicists are fighting for access to the control of thermonuclear fusion, and in fact – because of the creation of the earth’s Sun. At best, a miraculous nuclear reactor is literally under our feet at a depth of 7,000 km at first.
At first, 4.5 billion were “launched”. Let’s say what the planet was formed from. But even such a long “exploitation” is practically not detected in the amount of heat released by the Earth’s core – nuclear decay inside it reaches such a portion of the energy power up to 20 terawatts or 20 billion. kWh
Yet the Earth’s reactor cools down a little, at about 100°C every billion years. To do this, the uterus of primary heat, hot and not very hot, compensates for energy with a train and a thermal reaction that slows down the processes of natural cooling.
In the scientific community, there is still no consensus on the prospects for the “working resource” of the Earth’s core. However, this is a theory or the possibility of heat transfer that it is not possible for us to lose weight and the Earth, which is my imum, is several ten billion years old. By the way, the Sun may go out earlier.
Source: Tech Cult
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