1. Igneous Rock is rock that is formed from molten (melted) material

2. To classify (name) them you must know:
What minerals do they contain
How large are the crystals
Intrusive: rock that cools and hardens under the earth's surface
Large crystals
Extrusive: rock that cools and hardens on the earth's surface
Small crystals

4. Igneous Rock

5. Sedimentary Rock
Rock that is formed from sediments that are compacted and cemented together
Classification
1. Clastic (detrital): made of fragments of previous rock
Classified by size and shape of fragments
2. Biochemical or Organic: rock formed from once living material (fossils)
3. Chemical: formed from minerals left behind when water dries up

7. Rock Review

8. Sedimentary Rock

9. Metamorphic Rocks Rocks that have changed due to heat and pressure
Classification: according to arrangement of grains that make up rock
Foliated: bands, rock has a striped look
Nonfoliated: no bands or stripes seen

11. Metamorphic Rock

12. Quiz