What s in the center of the earth? What is the center of the earth made of?

The roughly outermost layer of the Earth is the crust, followed by the mantle, and finally the core. You should be referring to the Earth's core! In fact, most of the earth's core is composed of iron, which is one of the reasons for the geomagnetic field.

In addition, the interior of the earth is constantly undergoing nuclear reactions, which generate a large amount of heat and propagate outward.

You can get 2 points of asthenosphere.

In the upper mantle, about 100 kilometers below the Earth's surface, there is a distinct low-velocity layer of ** waves, which was first proposed by Gutenberg in 1926, called the asthenosphere, which is located in the upper part of the upper mantle, that is, the B layer. Below the ocean floor, it lies below a depth of about 60 km; On the mainland, it is located below a depth of about 120 kilometres, with an average depth of about 60,250 kilometres. Modern observations and studies have confirmed the existence of this asthenosphere.

It is also because of the existence of this asthenosphere that distinguishes the outer circle of the earth from the inner circle of the earth.

Mantle circle. **Waves belong to the mantle sphere, in addition to having a significant discontinuity about 33 km below the surface (called the Moho surface), below the asthenosphere and at the interface to a depth of about 2,900 km in the Earth's interior. Since the outer core of the Earth is liquid, the Chunye ** wave S wave in the mantle cannot cross this interface and propagate in the outer core.

The velocity of the p-wave curve also decreases sharply at this interface. This interface was discovered by Gutenberg in 1914, so it is also called the Gutenberg plane, which forms the interface between the mantle sphere and the outer nuclear fluid sphere. The entire mantle sphere consists of the upper mantle (B layer at a depth of 33,410 km, C layer at a depth of 410,1000 km, also known as the transition zone), the D layer of the lower mantle (1,000 to a depth of 2,700 km) and the D layer of the lower mantle (2,700 to a depth of 2,900 km).

Geophysical studies have shown that there is a strong transverse inhomogeneity in the D-layer, which is comparable to that of the rock layer, which is not only the thermal boundary layer of the heat transfer from the core to the mantle, but also the chemical stratification with a different chemical composition from the mantle.

Outer nuclear fluid sphere.

Beneath the mantle sphere is the so-called outer hydrosphere, which lies about 2,900 km to 5,120 km below the surface at depth. The entire outer nuclear liquid sphere may essentially be composed of liquids with very small kinetic viscosity, with depths of 2900 to 4980 km called the E layer, which is composed entirely of liquids. The depth layer of 4980 km to 5120 km is called the F layer, which is a very good transition layer between the outer liquid sphere and the solid inner core.

Solid inner circle.

The closest of the Earth's eight spheres to the center of the Earth is the so-called solid inner core, which is located between 5,120 and 6,371 kilometers from the center of the Earth, also known as the G layer. According to the detection and study of the ** wave velocity, it is proved that the G layer is a solid structure. The inner layers of the Earth are not homogeneous, with an average Earth density of grams3, while the density of the Earth's lithosphere is only grams3

As a result, the density of the Earth's interior must be much greater, and the density changes markedly with increasing depth. The temperature of the Earth's interior rises with depth. According to recent estimates, the temperature is 1300 °C at a depth of 100 km, 2000 °C at 300 km, about 4000 °C at the boundary between the mantle circle and the liquid sphere of the outer core, and 5500 to 6000 °C at the core

Interpretation of geocentrism.

the earth 's core]

The Earth's core, the central part of the Earth, has a radius of about 3,360 km, and its physical properties are markedly different from the surrounding mantle and crust explained in detail the central part of the Earth; Inside the strata. "Qing Historical Manuscript: Shi Xianzhi VIII": The high arc of the Taiyin from the horizon, the real height of the calculation from the center of the earth, and the apparent height of the person seen on the ground, the difference between them, that is, the radius difference.

Liu Baiyu, "Song of the Oil Hero": The hearts of oil workers rotate and rotate in the depths of the earth along with the drill bit. ”

Word decomposition Explanation of earth Ground ì Where human growth activities are located: Earth (one of the nine planets of the solar system). Geocentrism says.

The earth or a part of the earth: geology. Crust.

The part of the earth's surface that excludes oceans, rivers, and lakes: land. Ground floor.

Soil on the surface of the earth: land. Field.

Nuclear-only land administration. Landowner. Explanation of the Heart on Earth The heart is the organ in charge of blood circulation in humans and higher animals (commonly known as the "heart").

Pericardium. Rhythm. Heart failure.

Palpitation. **, hub , the main one: henchmen.

Centre. Habitually refers to the organs of thought and the state of thought, feelings, etc.: fingerprint digging psychology.

Mind. Heart. Heart-to-heart code friends.

Heart. Heartfelt. Relaxed.

Geocentrism (or Tiandong theory) is a theory that the ancients believed that the earth is the center of the universe and is stationary, while other planets orbit the earth. It is also the doctrine of the faith of the ancient Church.

The origin of geocentrism is very early, initially formed by the Miletus school, and then proposed by the ancient Greek scholar Eudox, refined by Aristotle, and further developed into "geocentrism".

For 1,300 years before the creation of heliocentrism in the 16th century, geocentrism reigned supreme. Aristotle's geocentric theory holds that the universe is a finite sphere, divided into two layers, heaven and earth, and the earth is located in the center of the universe, so the sun and moon orbit the earth, and objects always fall to the ground.

There are 9 equidistant horizons outside the Earth, in order from the inside out: Moon, Mercury, Venus, Sun, Mars, Jupiter, Saturn, Stellar and Prime Force, and nothing else. God moved the stellar celestial planes to move all the celestial planes.

The earth, where humans live, stands quietly at the center of the universe.