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The geochemical and geodynamic models explain the Earth's interior and structure Earth comprises four separate layers. Geologists believe that as the Earth cooled, the heavier and denser material sank into the center, and the lighter ones rose towards the top.
Inner Core
It is the center and the hottest layer of the Earth. The inner core is solid and made up of iron and nickel with temperatures up to 5,500oC. Due to its immense heat energy, the inner core is more like the engine room of the Earth. Inner core has pressures and temperatures so high that the metals are squeezed together and not able to move like a liquid but are forced to vibrate instead of solid.
Outer Core
The outer core of the Earth is similar to a very hot ball of metals, whose temperature is around 4000 oF to 90000F. It is so hot that the metals inside are all liquid. The outer core is around 1800 miles under the crust and is approximately 1400 miles thick. It is composed of metals such as iron and nickel. The outer core surrounds the inner core.
Mantle
The mantle is the widest section of the Earth. Its thickness is approximately 2,900 km. The mantle consists of very hot and dense rock. This layer of rock flows like asphalt under heavy weight. This flow is because of the greatest temperature differences from the bottom to the top of the mantle. The reason behind the plates of the Earth moving is the movement of the mantle.
Crust
The crust is the outer layer where we live. The thickness is around 0-60 km. It’s a solid rock layer divided into two types:
The Continental crust covers the land and, The oceanic crust covers the water
The crust is the most widely studied and understood. The mantle is hotter and capable of flowing. The outer and inner core is much hotter with great pressures that you can squeeze into a ball smaller than marble if you can go to the center of the Earth.
To know more about the layers of the earth:
https://brainly.com/question/28553651
