The Secret of the Earth's Core

It is generally believed that the chemical composition of the Earth is similar to that of meteorites, the composition of the Earth is similar to that of chondrites, and the composition of the Earth's core is similar to that of iron meteorites. This is because the materials inside the Earth are difficult to obtain directly, and the composition and formation evolution of materials inside the solar system have unity, especially the fact that the rocks on the surface of the Moon are similar to some rocks on the Earth's surface, further establishing the belief in the unity of materials in the solar system. Meteorites mainly come from the interior of the solar system, are attracted by the Earth's gravity and burn through the atmosphere before landing. Therefore, meteorites can serve as important clues for studying the material and elemental composition of the Earth's interior.

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The Earth's core is located below 2900 kilometers from the ground, with a radius of 3480 kilometers. The internal structure of the Earth's core: The Earth's core is divided into two parts: the outer core and the inner core. Based on iron meteorites originating from the cores of other planets, it is speculated that the Earth's core is also composed of iron and nickel, with a temperature of around 6000 ℃. The outer core of the Earth's core has a thickness of 2900-5165 kilometers and is in liquid form; Further down is the kernel, which is in solid state. The elemental composition of the Earth's core: The only substance in the solar system that has both sufficient density and abundant reserves to form such a large volume of the Earth's core is iron. Meteorites can be divided into three categories based on their chemical composition: stony meteorites, iron meteorites, and stony iron meteorites. The composition of Earth is similar to that of ordinary chondrites. Mantle convection is a very slow creep motion of the Earth's mantle composed of silicates, where thermal convection carries heat from the Earth's interior to its surface. The lithosphere is divided into many tectonic plates, and at the boundaries of these plates, new crust constantly forms in the ocean.