Exercise 2.2: Rock Types

1. What is the difference between intrusive and extrusive igneous rock?

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2. Where can igneous rock be found?

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3. When lava cools on the surface what happens to the size of the crystals in the rock?

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4. Explain why sedimentary rock forms in layers and why we often can see changes in the layers.

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5. Explain how coal is formed?

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6. In your own words, explain how metamorphic rock differs from sedimentary and igneous rock.

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7. Where is metamorphic rock formed?

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