Question

Describe different types of rocks and how it is formed

Answer 1

The three major types of rocks are :-

1. Igneous rock : two types of igneous rock :-

: Extrusive igneous rock - these are formed when the solidification of lava takes place on the surface of the earth ...

: Intrusive igneous rock - these are formed when the magma solidifies below the surface of the earth

2. sedimentary rocks : these rocks are formed through consolidation of accumulated sediments deposited in huge depressions like sea or lake

3. metamorphic rock : these rocks are formed through the process of metamorphosis. the term means alteration or transformation . metamorphosis may involve both physical and chemical changes in the characteristics of the pre existing rocks . metamorphosis of rocks takes place when they are subjected to high temperature pressure