Rocks and Minerals Class Notes

Laguna State Polytechnic University



EARTH
SCIENCE
Grade 11



Julia Mae A. Savarez

, 03 Rocks and Minerals

Introduction
Rocks and minerals are both solid, naturally formed substances that
are found in or on the earth. They are both inorganic, meaning they are
not made from tissues of living things. Rocks are made of minerals,
and minerals are not made of rocks.


ROCKS
 Any solid that naturally found on earth
 Organic matter
 Petrology - study the structure and compositions of rocks




TYPES OF ROCKS


Igneous Rocks

Derived from the Latin word “ignis” meaning fire
Form from solidification of magma
Magma inside the volcano
Lava outside of the volcano

Extrusive rocks
 Also known as volcanic rocks
 Lava cools down
 Fine grained or has lack of crystal growth
 Vesicular or air bubbles that are trapped inside the rock