The Structure of the Earth’s Interior :
The Structure of the Earth’s Interior The entire interior of the earth from surface to the centre is not alike.
It can be divided into 3 main parts according to the nature of the substance it contains, its temperature and depth.
The Earth`s Interior :
The Earth`s Interior The Crust
The Mantle
The Core
The Crust :
The Crust The outermost part of the earth is its crust.
It is about 30 to 70 Km under land surface and about 5 to 6 Km under the oceans.
It contains minerals of Aluminium , Magnesium, and Silicon.
It forms only 2% of the total volume of the earth.
The Mantle :
The Mantle Is about 70 to 2900 Km below the earth’s surface.
It contains minerals of Magnesium and Iron.
It forms about 82% of the total volume of the earth.
Up to a depth of 400 Km, the mantle consists of molten rock and below is made of extremely hard rock.
The Core :
The Core Inside the mantle is called the earth’s core.
The earth’s core is very hot.
It includes almost 16 % of the earth’s volume.
The central part up to 1200 Km is extremely hot.
It is made of iron and nickel and is like a solid
ball.
The part around it , having a thickness of about
2250 Km, is in the liquid state with a
temperature of more than 4000° C.
That’s all :
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