Structure of The Earth
which is the only planet in the solar system to have life on it, is nearly 4600 million years old and has formed through a series of various phases. It has many concentric layers which are necessary to learn about. The nature of changes that take place on the surface of the earth depend on it.
Crust(lithosphere):
It is the thinnest and outermost rocky surface layer of the earth surface with average Thickness of 8 to 100 km. It is made up of soil, rocks and minerals and consists of two layers: SIAL(Silicon and Aluminium) and SIMA(Silicon and Magnesium). As Sial is lighter than Sima, it floats above.
Mantle(Mesosphere):
Layer of dense rocks made up of dense molten minerals, mantle is the layer beneath the crust. It is approximately 2900 km thick and carries almost half of earth's mass.
Lava during volcanic erruption comes from upper mantle. Inner mantle is more brittle and solid and chiefly consist of iron and manganese. The temperature here ranges between 870 to 2200 degree celsius.
Core(Barysphere):
It has a radius of about 3500km from the centre of earth. The inner core is crystalline and solid because of extremely high temperature and pressure in it. The inner core is very dense and solid, composed mostly of Nickel and Iron(NiFe).
The outer core is in molten state with temperature of about 2200 degree celsius.
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Crust(lithosphere):
It is the thinnest and outermost rocky surface layer of the earth surface with average Thickness of 8 to 100 km. It is made up of soil, rocks and minerals and consists of two layers: SIAL(Silicon and Aluminium) and SIMA(Silicon and Magnesium). As Sial is lighter than Sima, it floats above.
Mantle(Mesosphere):
Layer of dense rocks made up of dense molten minerals, mantle is the layer beneath the crust. It is approximately 2900 km thick and carries almost half of earth's mass.
Lava during volcanic erruption comes from upper mantle. Inner mantle is more brittle and solid and chiefly consist of iron and manganese. The temperature here ranges between 870 to 2200 degree celsius.
Core(Barysphere):
It has a radius of about 3500km from the centre of earth. The inner core is crystalline and solid because of extremely high temperature and pressure in it. The inner core is very dense and solid, composed mostly of Nickel and Iron(NiFe).
The outer core is in molten state with temperature of about 2200 degree celsius.
Follow us at Student VM and watch interesting videos .
Happy Reading...
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