Objective: Tuesday, May 23, 2017 A-Day YWBAT explain the processes that change one type of rock to another. Drill: Create a concept map using the following words; rocks, metamorphic, igneous, sedimentary, intrusive, extrusive, foliated, non-foliated Homework Play Outside!! DiD you know…? The largest expanse of exposed metamorphic rock in the world is the Canadian Shield, a huge horseshoe-shaped region encircling Hudson Bay. Today’s Activities Drill Review Rock Cycles Rock Cycle Raps Conclusion Closure Question What environmental factors cause rock to undergo metamorphism? Conclusion Answer Increased pressure and increased temperature can cause metamorphism.