1. BELL RINGER 1/7/16 What special characteristic/feature would you only find in sedimentary rocks?

2. IGNEOUS ROCKS

3. Igneous rocks form as a result of cooling and solidifying of rock material that was once molten. Lava: Molten rock material on earth’s surface Magma: Molten rock material inside of earth

4. Igneous rocks are classified based on where they formed In trusive ( In side of Earth) – underground from magma Examples: Granite Pegmatite Peridotite Gabbro

5. Ex trusive ( Ex ited Earth and is now on the surface) – at the surface from lava Examples: Basalt Rhyolite Pumice Scoria

6. FORMATION OF IGNEOUS ROCKS Solidification: Changing from a liquid to a solid Crystallization: Liquid to solid that causes crystals to form

7. COOLING RATE 1.Slow – magma cools slowly underground. This give crystals a chance to grow, resulting in larger crystals.

8. COOLING RATE 2.Fast – lava cools quickly at the surface because it is exposed to air and water****. This doesn’t allow crystals to grow, resulting in small crystals. **If cooling rate is really fast, no crystals grow, resulting in a glassy texture.

9. RELATIONSHIP BETWEEN COOLING RATE AND CRYSTAL SIZE Crystal sizeCrystal size Cooling Rate

10. IDENTIFYING IGNEOUS ROCKS 1.Determine Texture Coarse- Minerals visible to the naked eye Examples: Granite, Pegmatite, Gabbro Fine- Need magnification to see minerals Examples: Basalt, Rhyolite, Andesite

11. IDENTIFYING IGNEOUS ROCKS 2.Use grain size to determine texture

12. IDENTIFYING IGNEOUS ROCKS 3.Check color and density for composition

13. IDENTIFYING IGNEOUS ROCKS 4.Use chart for mineral composition

14. http://www.ck12.org/book/CK-12-Earth-Science- Concepts-For-Middle-School/section/3.8/ http://www.ck12.org/book/CK-12-Earth-Science- Concepts-For-Middle-School/section/3.8/ Lava Flow GoPro Lava entering the ocean Smart or not so smart?