| Question |
Answer |
| Volcano | A mountain that forms when molten rock, called magma, is forced to the Earth's surface. |
| Lava | magma that flows onto the Earth's surface |
| Pyroclastic Material | Consists of rock fragments created by explosive volcanic eruptions. |
| Shield Volcanoes | A type of volcano that is built out of layers of lava from repeated nonexplosive eruptions. |
| Cinder Cone Volcanoes | Small volcanic cones made entirely of pyroclastic material from moderately explosive eruptions. |
| Composite Volcanoes | Volcanoes that are formed by explosive eruptions of pyroclastic material followed by quieter outpourings of lava. |
| Hot Spots | Places on the Earth's surface that are directly above columns of rising magma. |
| Convergent boundary | The place where two tectonic plates collide. |
| Divergent boundary | When two tectonic plates separate and move away from each other. |
| Crater | A funnel-shaped pit at the top of the central vent in most volcanoes. |
| Caldera | This forms when a magma chamber that supplies material to a volcano empties and its roof collapses. |
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