1. Igneous rocks are classified by Origin, Mineral Composition, and _______. Question #1b HardnessTextureLuster

2. Igneous rocks are classified in what three ways? Question #1

3. IN Igneous rock that forms IN the earth is ________. Igneous rock that forms when molten EXITS rock EXITS the earth and then cools is ________. Question #2

4. A rock that has both large and small grains is called ________. Porous Coarse-grained Porphyritic Question #3

5. The oceanic crust is made mainly from lava Basalt, which is cooled lava. Is Basalt intrusive or extrusive? Question #4

6. ABC Question #5 Which rock likely has the LEAST silica?

7. The continental crust is made mainly magma From Granite, which is cooled magma. Is Granite intrusive or extrusive? Question #4b

8. Question 1: Origin, Texture, Mineral Composition – Question 1b: Texture Question 2: Intrusive, Extrusive Question 3: Porphyritic Question 4: Extrusive – Question 4b: Intrusive Question 5: B Answer Key