Q. 4 A3.9( 9 Votes )

Draw neat diagrams, label them and explain.

The interior of the earth.

Answer :


Earth’s interior is classified into different layers.


The crust is the outermost layer of the earth’s surface. It is divided into continental crust and oceanic crust. It exists in a solid state. The continental crust is made up of silica and aluminium, whereas, the oceanic crust is made up of silica and magnesium. It is the thinnest of all layers when compared to mantle and core. The thickness of the crust varies. Continental crust is thicker than oceanic crust. The crust comprises large plates of land called tectonic plates. The movement and interaction of these tectonic plates are responsible for mountain formation, fertile plains, volcanic eruptions etc.


The mantle is the layer beneath the earth’s crust. It is the biggest part of the Earth comprising more than 85% of the Earth's mass. The upper mantle is in a liquid state. It is extremely hot, creating convection currents which are responsible for the movement of plates.


The core is the innermost layer of the earth. It consists of outer core and inner core. The outer core is made up of liquid state and inner core is made up of solid state. The core is mostly made up of iron and nickel. Earth’s core is responsible for the generation of the magnetic field, which protects from the high energy particles of solar wind.


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