What is the core of the Earth? What is the Earth s inner core called the outer core?

Core. It is the core part of the earth and is located in the innermost part of the earth. It has a radius of about 3470 km and is mainly composed of iron and nickel elements.

composition, high density, the average density of the earth's core material is about grams per cubic centimeter. The temperature is very high, there are 4000 7000, and the mass of the Earth's core accounts for the mass of the entire Earth.

of 315%, which is 16 2%。

According to the changes in the ** wave, it is found that the earth's core also has the difference between the outer core and the inner core. The interface between the inner and outer cores is about 5155 km. Since the transverse wave of the ** wave cannot pass through the outer core, it is generally assumed that the outer core is composed of molten or near-liquid substances composed of iron, nickel, silicon, and other substances.

The liquid outer core flows slowly, so it has been speculated that the formation of the Earth's magnetic field may be related to it. Since transverse waves are present in the inner core, the inner core may be solid. The structure of the sphere is similar to that of other terrestrial planets, and these layers can be determined by their chemical and rheological properties.

The Earth has a silicon-rich crust, a very viscous mantle.

An outer core of a liquid and a solid core. These have a negative impact on the internal structure of the earth.

The knowledge is based on physical evidence and some inferences, including material ejected by volcanoes and waves. The interior of the earth, from the surface of Gutenberg to the center of the earth, is called the core. There is a lot of controversy in the academic community about the material composition of the inner core, and many believe that it is mainly composed of iron and nickel.

But what exactly it is, all this needs to be further explored and proven. In addition, the inner and outer nuclei are not distinctly separated. The density of the Earth's core is great, even of the hardest diamonds.

Here, too, it will be pressed to butter soft. The Earth's core is the core of the Earth.

The inner core of the earth is a hot metal ball, and the two layers of the inner core interact with each other to create a huge magnetic field!

The total mass of the Earth's core is tons, which accounts for the mass of the entire Earth, and the volume accounts for the entire Earth. The Earth's core is larger than Mars in the solar system. The temperature range of the outer core increases from about 4000 °C near the outer mantle to 6100 °C near the core, while the temperature of the inner core increases from 6300 °C at the junction to 7000 °C at the center of the Earth.

Since the Earth's core is located in the deepest part of the Earth, the pressure is much greater than that of the Earth's crust and mantle, and in the case of such high temperatures, high pressures and high densities in the Earth's core, the concepts of "solid" or "liquid" that we usually call are no longer applicable. This is because the material in the earth's core has both the "rigidity" of steel and the "flexibility" (plasticity) of ash and asphalt. This substance is not only more than ten times harder than steel, but also slowly deforms and flows without breaking.

The earth's core is divided into two parts: the external core and the inland core. The material in the outer core is in a liquid state, and mainland nuclear scientists believe that it is a solid structure. The depth of the foreign core is 2900km to 5000km, and the depth of the inland core is 5100km to 6371km.

In addition, between the inner and outer cores, there is a small "transition layer", which is between 4,980 and 5,120 kilometers underground. It stretches from the base of the lower mantle to the Earth's core at a distance of about 3,473 kilometers. According to scientific observation and analysis, the earth's core is divided into three levels: external core, transitional layer and inland core.

The outer core is 1,742 kilometers thick, with an average density of about one cubic centimeter, and the substance is in a liquid state. The thickness of the transition layer is only more than 100 kilometers, and the substance is in a state of transition from liquid to solid. The thickness of the inland core is 1,216 kilometers, and the average density increases to grams of cubic centimeters, and the main components are heavy metals such as iron and nickel, so they are also called iron-nickel cores.

Temperature and pressure <>

From the outside to the inside, the earth can be divided into the crust and the upper oneMantle, lower mantle, outer core, inner core.

The interior of the Earth, like other terrestrial planets, can be based onChemical propertiesor physical (rheology) properties divided into layers. However, there is a clear difference between the inner core and outer core of the Earth, which is a feature not found in other terrestrial planets. The outer layers of the earth are made up ofSilicatesThe earth's crust is composed of minerals, and there is a mantle composed of a layer of viscous solids underneath.

Below the lithosphere is the less viscous asthenosphere, which slides just above it. Major changes in the crystal structure of the Earth's mantle occur between 410 and 660 km below the surface, the transition zone separating the upper mantle from the lower mantle. Below the mantle, is the mantle that separates the mantle andCore. The boundary of the core mantle (the Gutenberg discontinuity), and further down is the very viscous liquid outer core, and the innermost is the solid inner core.

Inland nuclear spinningAngular velocityProbably a little faster than the rest of the Earth, about a year ahead. The radius of the inland core is 1220 kilometers, which is aboutEarth's radiusof 1 5.

Diagram of the Earth's tectonics.

It is the energy generated by the decay of radioactive elements in the Earth's core that raises the temperature of the Earth's interior.

Most of the radioactive elements are heavy elements, which are gradually deposited in the core of the earth after the formation of the earth. These elements are unstable and will be transformed into other lighter elements through decay, and in the process of decay, energy will be radiated outward, and these energy will accumulate in the core of the earth in the form of thermal energy, which will increase the temperature of the core of the earth.

If you want to understand the heating principle of the earth's core, you have to start with the structure of the earth.

The geological structure of the earth.

If we can divide the earth in two like cutting a fruit, then we can see that the interior of the earth is divided into circles. In fact, the earth's crust is the outermost layer of the earth, similar to the outer skin of a fruit. The average thickness of the earth's crust is about 17 kilometers, and the ground in gardens and parks is the outermost layer of the earth, resembling the rind of a fruit.

The average thickness of the earth's crust is about 17 kilometers, and the ground in courtyards and parks is the outermost layer of the earth's crust. If you start digging down from the soil in the ground, you will eventually hit the lithosphere. On land, the main component of the earth's crust is granite.

Underneath the ocean, the crust is much thinner, starting from the bottom of the ocean, the crustal layer extends down for about a kilometer, and the main component is another rock - basalt.

Underneath the Earth's crust is a deep mantle layer, which is 2,856 kilometers thick. Scientists don't know much about the mantle layer deep underground, except that the outermost layer of the mantle may be composed mainly of a rock called peridotite. Scientists believe that at least part of the Earth's mantle is soft because of the liquid lava that meets the mantle layer on the side close to the Earth's core.

Finally, there is the center of the earth, which is the core. It is about 3,480 kilometers thick from the outermost layer of the Earth's core to the most center of the Earth. It seems that it should be colder here than in the north and south of the north and south due to the distance from the sun.

But in fact, the temperature near the center of the earth is extremely high, about 4,000 degrees Celsius, so high that the outer layer of the earth's core is liquid, mainly molten metal.

The cause of the high temperature of the Earth's core.

The density of the Earth's core is very large. Because most of the planet's weight is on the Earth's core, the matter here is tightly squeezed together. Scientists believe that the enormous pressure has made the Earth's inner core a solid iron core.

Even though the temperature is very high, the huge pressure makes all the iron molecules tightly pressed together, and the macroscopic state remains solid. Earth's solid metal ball, which is about three-quarters the volume of the Moon, is encased in a sea of liquid metal, becoming a planet within a planet.

So where does the heat from the depths of the earth come from? Most of the heat was generated when the Earth was formed 4.6 billion years ago – the Earth is emitted when smaller objects collide together. However, some geologists believe that most of the heat comes from natural radioactive energy deep in the earth.

Radioactive elements in the Earth's interior release particles, such as electrons, which collide with atoms in the rock layer and transfer some of the energy to the atoms in the rock, and the temperature of the rock begins to rise. In the early days of the Earth's formation, these radioactive elements made the rocks in the Earth's interior very hot, and the rocks easily conserved heat, so the heat was retained in the Earth's interior. Hundreds of years later, the Earth's interior is hot enough to melt the metal in the rocks.

Later, heavy metals were separated from the lighter metals and sank to the core of the earth, forming the core.

1. According to the propagation speed of the first wave, the core of the earth can be divided into the inner core and the outer core, the outer core is liquid, the inner core is solid, and the main components of the core are iron, nickel, etc., at present, many experts believe that the main substance in the core of the earth may be the iron-nickel alloy in the crystal state, the iron is heated to a molten state, and the pressure of the blind environment where the molten iron is located is gradually increased to 100,000 atmospheres, the viscosity of the molten iron will continue to increase, and the crystal lattice in the iron will be gradually destroyed. Its atomic structure presents an irregular arrangement, that is, an amorphous state;

2. The maximum pressure in the earth's core is about 3.7 million atmospheres, and the temperature of the earth's core is about 5,000 degrees Celsius.