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| Aa lava | A type of sharp-edged lava. |
| ancient | Very, very old or long ago |
| ash | Tiny pieces of magma thrown from a volcano |
| caldera | A large volcanic craterwhen a magma chamber is emptied |
| cone | The top part of a volcano. |
| crust | The thin layer of rock on the surface of the earth. |
| destruction | When something is destroyed. |
| dormant | Has not erupted for some time. |
| eruption | When magma flows through holes in the Earth's crust |
| geothermal energy | Energy from the hot rocks below the Earth' surface |
| geyser | A hot spring that shoots hot water and steam into the air. |
| hot spring | A gentle eruption of hot water from beneath the ground. |
| indestructible | Unable to destroy |
| intense | Extremely hot or strong |
| lahar | A mudslide of water,ash and soil. |
| lapilli | Tiny pebbles of magma. |
| lava | Liquid magma that flows from a volcano and cools to become solid rock |
| lava bombs | Very large lumps of magma thrown from a volcano. |
| magma | Rocks that has become so hot it has melted |
| minerals | Metals formed inside underground rocks. |
| molten | Rock of metal that has been heated until it becomes a thick sticky liquid |
| pahoehoe lava | A type of lava that cools to become smooth rock |
| pillow lava | A type of lava flowing from undersea volcanoes and shaped by the cold ocean water. |
| super heated | When something is heated to an extremely high temperature. |
| tsunami | A giant ocean wave started by an undersea eruption |
| vulcanologist | A scientist who studies volcanoes. |