Name_____________________________________________
Date___________
Igneous Rocks Guided Reading
Block__________
Directions: Answer the following questions based on the reading from the textbook pgs. 70-74
1. How do igneous rocks form?
2. Different kinds of igneous rocks form when____________________________________________________________.
3. What are intrusive igneous rocks?
4. What are extrusive igneous rocks?
5. What are two characteristics used to classify igneous rocks?
6. How does cooling time affect the size of crystals formed in rocks?
7. Slow cooling results in the formation of_______________________________________.
8. Rapid cooling of magma or lava results in rocks with_____________________________________________________.
9. What kind of cooling conditions produce igneous rocks with a glassy texture?
10. What does porphyritic texture mean?
11. What does granitic composition look like?
12. What does basaltic composition look like?
13. What does andesitic composition look like?