1. Igneous

2. Igneous Rock
Igneous rocks form when melted rock from deep below the Earth’s surface cools and hardens.
As it cools the minerals form crystals that looks like grains in the rock.
Example: Granite

3. Igneous Rock
Some igneous rocks form when melted rock flows onto the Earth’s surface through an opening called a volcano.
This rock cools very quickly and has very small crystals, or none at all.
Example: Obsidian, Basalt, and Pumice

5. Sedimentary

6. Sedimentary Rock
Sedimentary rocks form when sediments are pressed together and harden.
Sediments are bits of rock, soil, and once-living things.
Example: Sandstone

7. Sedimentary Rock
Limestone is made of shells and skeletons of ocean animals.
Shale is the most common sedimentary rock. It is form from particles of clay.

8. Sedimentary Rock
Conglomerate forms from sediments of different sizes

9. Metamorphic Rock

10. Metamorphic Rock
Metamorphic rocks are formed when old rocks are changed into new rocks by heat and pressure.
Igneous, Sedimentary, and Metamorphic rocks can all change into new rocks by heat and pressure.
Ex.) Limestone changes to marble

11. Metamorphic Rock
Granite changes to Gneiss

12. Metamorphic Rock
Shale (SR) changes to slate (MR)…that changes to schist (MR)