1. AIM: How are metamorphic rocks formed, classified and used? OBJ: Given notes and activity sheet SWBAT explain how metamorphic rocks are formed, classified and used with 70% accuracy DN: HW Check- WEDS Activity Sheet (distribute Answer Key); Watch video https://www.youtube.com/watch?v=kRUwchlza88 ACT: Introduction to Metamorphic Rocks (Notes) Text, read p. 160-162; Complete Metamorphic Rocks Activity Sheet HW: Complete Metamorphic Rocks Activity Sheet; Minerals & Rocks Exam, March 20. https://www.youtube.com/watch?v=kRUwchlza88

2. Metamorphic Rocks Metamorphic = change form; heat & pressure deep beneath Earth’s surface can change any rock into a metamorphic rock. Metamorphism occurs: 1) At the site of plate collision (subduction) 2) Within the core of mountains 3) Near rising magma plumes.

3. Types of Metamorphic Rocks High Temperature: changes the size & shape of the grains or mineral crystals (= recrystallization). Extreme Pressure: squeezes rock so tightly that mineral grains /crystals line up in flat, parallel layers.

4. Metamorphic Rocks Metamorphic Rocks are classified based on the arrangement of the grains (crystals): Foliated Rocks: the crystals are arranged in parallel layers or bands. Nonfoliated Rocks: the mineral grains are arranged randomly and grain (crystal) size has increased (= recrystallization). These rocks are extremely hard.

5. original rock → metamorphic rock shale → slate granite → gneiss sandstone → quartzite limestone→ marble

6. Granite Metamorphism Gneiss Limestone Metamorphism Marble

7. Shale Metamorphism Slate Limestone Metamorphism Marble

9. High Grade

12. Metamorphic Settings

13. Uses of Metamorphic Rock Building: slate flooring, walkways, chalkboard, marble Sculpture: marble Lincoln Memorial