| A | B |
|---|
| volcano | an opening in the earth's crust that forms a mountain when lava and ash erupt |
| vent | an opening in the earth's surface through which lava, ash, and cinders can flow |
| crater | steep walled crater at the top of a volcanic vent |
| Pacific Ring of Fire | area around the Pacific Plate with volcanoes and earthquakes |
| hot spot | places in the earth where the mantle is hotter. magma can melt through the crust |
| geothermal energy | thermal energy from magma bodies inside the earth |
| hot dry rock | generating energy using the earth's internal hot dry rock |
| shield volcano | broad, gently sloping volcanoes built by quiet eruptions |
| tephra | volcanic material ash, cinders, and rock |
| cinder cone | steep sided volcanoes with explosive eruptions |
| composite volcano | volcano that forms at a convergent boundary. Eruptions vary between quiet and explosive |
| batholith | large, thick intrusive igneous rock bodies |
| dike | vertical column of magma |
| sill | horizontal layer of magma |
| volcanic neck | a solid igneous core |
| caldera | formed after the top of a volcano collapses |
