| A | B |
|---|
| volcano | mountain made of lava and/or volcanic ash |
| vent | an openingthrough which lava flows |
| crater | the steep-walled depression at the top of a volcanic vent |
| Pacific Ring of Fire | the area around the Pacific Plate where volcanoes and earthquakes are common due to the tectonic movement |
| hot spot | area in the Earth's mantle that are hotter than the neighboring areas, forming melted rock that rises toward the crust |
| geothermal energy | energy that comes from magma or HDR |
| hot dry rock (HDR) | a new technology in which heat from Earth's internal hot dry rock material is used to generate energy |
| shield volcano | volcano with gently sloping sides |
| tephra | ash and cinders thrown from a volcano |
| cinder cone | a type of volcano in which tephra (cinders) piles up into a steep-sided cone |
| composite volcano | steep-sided volcano of lava and tephra |
| batholith | largest igneous intrusion |
| dike | an intrusive igneous rock body formed when magama is squeezed into a vertical crack that cuts across rock layers and solidifies underground |
| sill | an igneous intrusion formed between rock layers |
| volcanic neck | solid magma core of a volcano |
| caldera | large depression formed by the collapse of a volcano |
