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Igneous Rocks Compare pictures A and B A . Which rock is intrusive? 1 B A 2. Which rock is extrusive? B A 3. Which rock cools slowly? B A 4. Which rock cools quickly? B A 5.Which rock forms from lava? B A B 6. Which rock forms from magma? A 7. Which rock is coarse grained? B A 8. Which rock is fine grained? B A B 9. Which rock is formed under the Earth’s surface? A B 10. Which rock is formed above the Earth’s surface?