'Igneous Rock Lab' Geography Worksheet Page 2

Conclusions:

1. Was your hypothesis right or wrong? Explain your answer.

2. How can you tell the difference between extrusive and intrusive rocks?

3. How are igneous rocks formed?

4. Where do extrusive igneous rocks form?

5. Where do intrusive igneous rocks form?

6. What substance causes igneous rocks to get darker?

7. If an igneous rock contains large substances of silica, it is classified as a

rock.

(felsic, mafic)

8. How does the cooling rate of lava affect the texture

of igneous rock?

(crystal size)

9. How does the cooling rate of magma affect the texture

of igneous rock?

(crystal size)

10. What is the difference between magma and lava?

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