Download -1- 1. Distinguish between intrusive and extrusive igneous rocks. 2

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87.201 - PRINCIPLES OF EARTH & ENVIRONMENTAL SYSTEMS I
STUDY QUESTIONS V
MAGMA AND VOLCANOES
1. Distinguish between intrusive and extrusive igneous rocks.
2. Why are some volcanic eruptions explosive, while others are quiet. Describe the hazards and potential
environmental effects associated with each type of volcanism.
3. What types of measurements would you make to assess the likelihood of a volcanic eruption.
4. What types of material are erupted from a volcano?
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5. Distinguish between a dike and a sill.
6. Distinguish between fractional crystallization and fractional melting.
7. The three main magma types are basaltic, andesitic, and rhyolitic. How do these magma types form?
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