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Igneous Rocks Quiz

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1. What is the primary way in which igneous rocks form?

2. What describes an intrusive igneous rock?

3. What describes a extrusive igneous rock?

4. What common kitchen item is an example of an extrusive igneous rock?

5. Which igneous rock is characterized by its light color and coarse grain size?

6. Which igneous rock is characterized by its dark color and fine grain size?

7. Which igneous rock floats in water due to its porous nature?

8. Which igneous rock is often used to make arrowheads due to its sharp edges when broken?

9. Why are large crystals typically found in intrusive igneous rocks?

10. Why are tiny crystals often found in extrusive igneous rocks?