Chapter 5 Handout: Volcanoes
Standards:
S6E5 – Students will investigate the scientific view of how the earth’s
surface is formed. (d- changes on earth’s surface; e-plate movement;
f-geographical features)
Key Terms:
1. Volcano
2. Magma
3. Lava
4. Ring of Fire
5. Island arc
6. Hot spot
7. Magma chamber
8. Vent
9. Crater
10.Viscosity
11.Silica
12.Dormant
13.Extinct
14.Shield volcano
15.Cinder cone volcano
16.Composite volcano
17.Caldera
18.Geothermal energy
Essential Questions on the BACK!! 
Essential Questions:
1. Where do volcanic belts form?
2. What type of plate boundary is associated with island arcs?
3. What are 3 of the major island arcs?
4. What is responsible for the formation of the Hawaiian islands?
5. When a volcano _____________, the force of the _______________
________ pushes magma from the ______________ _________________
through the pipe until it flows or explodes out of the ________________.
6. The viscosity of magma depends on its ______________ content and
____________________.
7. If the volcano’s magma is low in silica, what type of eruption will it have?
8. If the volcano’s magma is high in silica, what type of eruption will it have?
9. An explosive eruption breaks lava into fragments of different sizes. List the
3 types of fragments in order of size from smallest to largest. (pg 155)
10.What is the main hazard of a quiet eruption? An explosive eruption?
11.What are the 3 terms used to describe a volcano’s stage of activity?
12.How do geologists monitor volcanoes?
13.What triggers the small earthquakes associated with some volcanic
eruptions?
14.What are the three types of volcanoes?
15.Groundwater heated by magma is a source of what type energy?
16. Understand Figure 3, Pg 148 and how volcanoes form at each type of plate
boundary.