In an attempt to see what is under the surface of the Earth, scientists have done. After years of research, scientists have finally concluded that one. Four layers of earth These four layers, namely, the crust is the mantle, the outer core and the inner core formed by the process of cooling of the earth during the training.
Internal structure: The main layers of the earth
Our understanding of the internal structure of the Earth is based on geographical studies, including the analysis of seismic waves, experiments with crystalline solids at high pressure, etc. Below are the details of each of these layers as shown in the figure of the Earth, the core teams.
Rind: The crust is the outermost layer of the earth to a depth of 3 to 40 miles. It is basically divided into two parts – the continental crust, with an average depth of 22 to 25 miles, and the oceanic crust, with an average depth of 3 -. 6 miles of the continental crust is composed of sodium, aluminum potassium silicate rocks, which are a bit like the granite at all. Dense oceanic crust of iron and magnesium silicates, which are much like basalt Sial (silica + alumina) and Sima (silica + magnesium) – These rocks, which form the crust roughly divided into two types.
Coat: The coat second layer of the earth, which is the thickest layer of the plane at a depth of some 1,800 miles across. The envelope is made of silicates and relatively rich in iron and magnesium. Even if this is the layer of the earth to a certain extent also ductile – a property that can be attributed to the high temperature of the inner earth. Ductility continue to increase as you go further, due to the fact that the pressure increases with depth. The viscosity is higher at the point adjacent to the sheath and the core.
Core: It is almost impossible to reach the core, which is the innermost layer of the soil to determine its condition, and the information we have on the Earth’s core focus on the seismic measurements. The solid inner core and the outer core, the liquid – the core is substantially divided into two sections.
Inner core: The solid inner core is considered compound of iron and nickel. This is based on the view that the formation of the earth melt denser material at the center of regulation, while lighter materials floated to the surface resulting in a process known as planetary differentiation. According to the dynamo theory, turns liquid outer core. Around the inner core, which is thought to be the causative factor of magnetic
Outer core: The liquid outer core are believed to be composed of iron mixed with nickel, with traces of light elements. This part of the interior of the earth is generally contain high pressures and high temperatures. In fact, scientists estimate that the temperature of the inner core is higher than the temperature of the surface of the Sun The solid inner core is intense pressure on this area, so that everything does not move quite reasonable.
This was a brief information on the four main layers of the Earth – crust, mantle, inner, outer and inner core base. Troposphere, stratosphere, mesosphere, thermosphere and exosphere – even Earth’s atmosphere is divided into five layers. These layers of the atmosphere of the planet is as important as the inner layers when it comes to the Earth is the only planet with life.