Volcanoes Objectives
1. Know the difference between continental plates and oceanic plates (rock type and thickness).
2. Define subduction and know the name of the plate that is subducting underneath Northern
California.
3. Explain how an island arc forms and how volcanic mountain chains form and the difference
between both.
4. Explain how a rift valley forms and know the two main areas of Earth where this is currently
occurring.
5. Understand the difference between rift volcanism, subduction volcanism, and hot spot
volcanism.
6. Explain the difference between a mid-ocean ridge and a deep-sea trench.
7. Know the two main volcanic belts formed by subduction.
8. Know the two main types of volcanoes (composite and shield).
9. Know how lava type influences explosiveness of a volcano and the factors that increase lava
viscosity.
10. Know why Hawaii and Yellowstone are volcanically active and the difference between these
two areas.
11. Know the difference between volcanoes found in the ocean and those found on the
continents.
12. Know the three main types of magma that fuels volcanoes and the main differences between
them.
13. Know where Mount Lassen, Long Valley Caldera, Mount Shasta, Mount St. Helens, and
Mount Rainier are located.
14. Know the location of the Cascade Mountain range and identify the name of the subducting
plate responsible for the volcanic activity and volcanoes that encompass this range.
Notebook Checklist: Notes are due the day of the test and must be in this order!
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Volcanoes Divider
Volcanoes Objectives
Where Volcanoes Occur Notes
Types of Magma, Explosiveness, and Volcanic Shapes Notes
Magma Composition Chart
Types of Volcanoes Notes
Volcanic Hazards Notes