Question

U TOU
(4) Biosphere.
(1)
Area and formation : Upper layer of the earth's crust is approximately 64 to 100 km thick
Light matters like aluminium and silica are mainly found in that. This layer is thin in the deep sea.
Lithosphere occupies about 29% of the earth's surface. Mountains, plateaus and Plains etc. are there
on this part of land. As we go into the depth of Lithosphere, the temperature increases gradually.
On moving towards the depth, generally per killometer 30° C temperature increases. Internal rocks
are melted due to the intensive heat and turn into semi liquid form. This molten liquid is called Magma'. It
consists of various gases, here high pressure of the upper rocks is observed.
Thus, balance is maintained - between two opposite forces like pressure and heat, that is why
earth crust does not burst.
Lithosphere has close relation with biosphere and vegetation. Our home, water, farming, industry
and all are closely associated with Lithosphere. Minerals and crude oil is obtained from Lithosphere.
Various crops are obtained thorugh farming. Various industries and other economic activities are
performed in the plain regions. Forests on the mountanious region is indebted to the Lithosphere. In
short it can be said that the pillar, from food to dwelling and base of our existance means lithosphere.
Hain Spheres of the earth (1) Lithosphere (2) Hydrosphere (3) Atmosphere
Lithosphere: Upper layer of the earth surface is generally made up of soil and sia
matters. "Litho' means soil that is why upper layer of the earth is known as "Lithosphere'. As this layer
is also made up of rocks and solid matters, it is known as 'the rock sphere' or the solid-sphere.​

Answer 1

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