1. Rocks and Minerals Igneous Rocks Objectives

2. 1. Distinguish between rocks and minerals 2. List the three major classification groups of rocks 3. Explain the process by which igneous rocks form 4. Distinguish between intrusive and extrusive igneous rocks

3. 5. Explain how crystal size is used to determine a rocks cooling history 6. Using the characteristics of crystal size, mineral composition, density and color student should be able to identify an unknown igneous rock using the E.S.R.T’s

4. 7. Describe the portion of the crust where felsic vx. mafic rocks are common.

5. Igneous Rocks

6. Lava!! Extrusive Igneous Lava Extrusive Igneous Lava

7. Objective 1 Objective 1  Rocks are made of minerals. Rocks can be made of only one mineral or several. Rock of Gibraltar

8. Objective 2 Objective 2  _________ Produced by the solidification of magma  ___________ Produced by compaction and cementation of fragments.  __________ produced from preexisting rocks by heat and pressure Slate Igneous Sedimentary Metamorphic

9. Objective 3  Igneous rocks form by the _______ of liquid magma or lava which causes ________ into rock. –If solidification occurs __________ the earth’s surface an _______ rock is formed. –Due to the slow cooling rate beneath the surface, crystals grow large in size and we call the rock ______ grained. Cooling solidification beneath Intrusive coarse

10.  If solidification occurs ________ the earth’s surface an ________ igneous rock is formed.  Due to the fast cooling rate above the surface, crystals grow ______ in size and we call the rock__________________ Above extrusive small Fine or glossy

13. Objective 7  Felsic rocks are found typically on _________ and mafic rocks are found in ________ basins.  Note: Continental Crust is thick and ocean crust is thin. Diagram Continents Oceans

17. Igneous Rocks