The document discusses the three main types of rocks: igneous, sedimentary, and metamorphic. Metamorphic rocks are formed through the process of metamorphism, which involves physical and chemical changes transforming other types of rocks. Metamorphism alters the characteristics of pre-existing rocks. Metamorphic rocks play an important role in many human activities on earth.

2. Earth is made up of rocks and
minerals.
The rocks forming the crust of the
earth are in solid state.
Any Mass of harder portion of the
earth’s crust can be called a
Rock.

4.  The crust of the earth is formed by a
variety of rocks differing from each other
in composition , texture , colour , etc.
 The three type of Rocks are :-
1) Igneous Rocks 2)Sedimentary
Rocks
3)Metamorphic Rocks
We are going to learn about only Metamorphic

6.  Metamorphic Rocks are formed
through the process of
metamorphism.
 The term metamorphism means
alteration or transformation.
 Metamorphism may involve both
physical as well as chemical changes
in the characteristics of the pre-

8.  Most of the human activities are
performed the rock sphere of the
earth .
 Rocks hold a great significance for

10. Thank You
Done by group 3