Exercise 2.2: Rock Types
1. What is the difference between intrusive and extrusive igneous rock?
2. Where can igneous rock be found?
3. When lava cools on the surface what happens to the size of the crystals in the rock?
4. Explain why sedimentary rock forms in layers and why we often can see changes in the layers.
5. Explain how coal is formed?
6. In your own words, explain how metamorphic rock differs from sedimentary and igneous rock.
7. Where is metamorphic rock formed?