Question

Explain formation of rocks briefly?

Answer 1

The earth is divided into three categories they are 
crust, mantle, core.
the inner and outer core is mainly made up of iron and nickel
the mantle and crust are largely composed of silicate rock
the crust and upper mantle is known as lithosphere
in this rocks are formed and reformed and it also says about the type of rock
there are three types they are igneous and sedimentary and metamorphic.
igneous rocks are formed when melted rocks and solidifies 
sedimentary rocks are formed when starting soil when other materials are eroded
metamorphic rocks are formed when the soil changes