Thursday, January 17, 2019 B-Day Objective: YWBAT explain the processes that change one type of rock to another. Drill: How does the cooling rate of lava or magma affect the texture of an igneous rock? Homework Practice rock cycle raps Open notes WOW quiz on Wednesday

Answer When magma cools slowly, crystals have a long time to grow, so the igneous rock that forms is coarse- grained. When magma cools quickly, crystals have a short time to grow, so the igneous rock that forms is fine- grained.

Did you know…? The oldest known rock lies in Canada. The Acasta gneiss, a metamorphic rock, is 3.96 billion years old.

Today’s Activities Drill Rock Cycle Rap Conclusion

Does the rock cycle only go in one direction? Explain Closure Question Does the rock cycle only go in one direction? Explain

Conclusion Answer No – the rock cycle goes in many different directions. Rocks are constantly changing.