What is the Earth s core like, solid or liquid

The earth's core is a solid core, also known as iron-nickel core, and its material composition is mainly iron and nickel, and it is divided into the core and the outer core. The apical interface of the core is about 5100 km from the surface, about 1 3 of the diameter of the core, and is probably solid, with a density of gram cubic centimeters. The apical interface of the outer core is 2,900 km above the surface and may be liquid, with a density of 9-11 grams cubic centimeters.

It is speculated that the outer core may be composed of liquid iron, and the core is thought to be composed of a highly rigid solid iron-nickel alloy crystallized at very high pressures. The pressure in the center of the Earth's core can reach 3.5 million atmospheres, and the temperature can reach 4000 5000. Under such high temperature and high pressure conditions, the material at the center of the earth is characterized by being as malleable as resin and wax under the long-term action of high temperature and high pressure, but it is harder than steel for a short period of time.

Abbreviation for Earth's center of mass. The origin of the Earth's frame of reference is defined in a common center of mass that includes the solid Earth, the atmosphere, and the oceans.

The center of the earth is divided into two parts: the inner heart and the outer center. The closer the Earth's interior is to the Earth's core, the hotter it gets, and scientists estimate that the temperature at the Earth's center is about 6,000 degrees Celsius.

So, what's inside the center of the earth?

At present, it is believed that the core of the earth is mainly composed of iron and nickel elements, the material of the outer core is liquid, and the inner core is now considered by scientists to be a solid structure.

As for what kind of substance is in the depths of the earth and what state it is in, the scientific community still has different opinions, and it is difficult to draw conclusions.

There are several hypotheses about the center of the earth:

1) The theory of liquid core asserts that the earth's core is composed of a substance with a density of cubic centimeters under special high temperature and high pressure inside the earth's core. Pressure estimates range from 1,550 tonnes per square centimeter in the uppermost part of the liquid core to about 3,875 tonnes in the Earth's core. Temperatures are uncertain, but deep pits know that temperatures increase with depth, and based on the thermal conductivity of the rocks, geologists estimate that the temperature of the (rather rough) liquid core is about 5,000 degrees Celsius (the center of Jupiter could be as high as 50,000 degrees Celsius).

2) The two substances say that the silicate geosis and the nickel-iron core (composed like egg whites and egg yolks) and that the early earth must have been liquid, and later it may contain two insoluble liquids. Silicate liquids are lighter and float above and cool by radiating heat into space. The iron melt at the bottom is isolated by the upper layer and cannot be directly exposed, and the heat release is very slow, so it may still be liquid until now.

Of course, not all scientists accept the idea that the Earth has a liquid phase. The American chemist Harold Clayton Urey insisted that the Earth has always been solid. He retorted that the iron cores of the great solid-state Earth could still be formed by the slow separation of iron; Even now, iron may migrate from the ground to the core at a rate of 50,000 tons per second.

3) Crystal Theory The center of the earth is made up of a huge crystal. This theory did exist and was made into a science fiction movie, but it seems to be denied for the time being, due to a lack of factual basis.

Earth's coreThe outer part is in a liquid state, and the outer part is the outer core; The part inside is solid, and the part is the inner core.

The Earth's core is located in the deepest part of the Earth's interior, starting at a distance of 3,000 kilometers from the Earth's surface and ending at the center of the Earth. The Earth's core is mainly composed of two metals, iron and nickel, with iron accounting for the majority. The whole core is not a homogeneous phase, but the outer part is in a liquid state, and this part is the outer core; The part inside is solid, and the part is the inner core.

The difference between the mainland nuclear and the foreign nuclear core

The temperature of the Earth's core is very high, and the lowest temperature in the outer core can reach 3,700 degrees Celsius.

The higher the temperature is towards the center of the earth. By the time it reaches the center of the earth, the temperature has risen to the equivalent of the surface of the sun, i.e. 5,500 degrees. At such extreme temperatures, metals and alloys as we know them should all be in a liquid state.

However, the melting point of the metal is also affected by the pressure. The higher the pressure, the higher the melting point of the metal. It is estimated that the pressure in the inner core is as high as the atmospheric pressure at the surface.

3.6 million times. In the extreme pressure environment of the inner core, scientists believe that the crystal structure of iron should be presented as the most densely packed structure, the hexagonal dense structure.

Hence, iron-nickel alloys.

The melting point will be greatly increased, and it will be higher than 5500 degrees, so the inner core will appear solid. While the pressure of the outer core is relatively low, and the melting point of iron-nickel alloys is also relatively low, they will remain liquid in the temperature of the outer core.

The earth's core is the core part of the earth, mainly composed of iron and nickel, and the earth's core is divided into two parts: the outer core and the inner core. The earth's core is the core part of the earth, mainly composed of iron and nickel, and the earth's core is divided into two parts: the outer core and the inner core.

The main components are heavy metals based on iron and nickel, also known as iron-nickel cores.