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3:2 science
| Question | Answer |
|---|---|
| Volcano | erupting vent through which molten rock surfaces; creating and destructing mountains |
| Magma | Molten rock beneath the Earth surface. |
| lava | magma that flows out onto Earth's surface |
| Ring of fire | Pacific Ring of Fire (or just The Ring of Fire) is an area where large numbers of earthquakes and volcanic eruptions occur in the basin of the Pacific Ocean. |
| island arc | A string of islands formed by the volcanoes along a deep ocean trench |
| hot spot | An area where magma from deep within the mantle melts through the crust above it |
| Magma chamber | Pocket of magma beneath Earth's surface. |
| volcanic pipe | A long tube into the ground that connects the magma chamber to Earth's surface. |
| vent | opening of a volcano where magma is forced up |
| lava flow | Melted rock flowing on the surface of the Earth. |
| crater | circular depression at the top of a volcano. |
| silica | A material found in magma that is formed from the elements oxygen and silicon. |
| pahoehoe | A hot, fast-moving type of lava that hardens to form smooth, rope-like coils. |
| Aa | A slow-moving type of lava that hardens to form rough chunks; cooler than pahoehoe |
| pyroclastic flow | A super-heated cloud of ash, gas and rock. |
| active vlocano | A volcano that is currently erupting or likely to erupt. |
| dormant volcano | When it is not erupting but capable of erupting in the future. |
| extinct volcano | A volcano that no longer erupts and is in the process of eroding. |
| hot spring | A pool of groundwater that has risen to the surface after being heated by a nearby body of magma. |
| geyser | Fountain of water and steam that erupts from the ground. |
| geothermal | underground heat warms water, and steam turns turbines and generators. |
| shield volcano | Long, low sloping sides, lava erupted through vents and fissures. |
| cinder cone volcano | A steep cone shaped hill made of volcanic ash around the volcano's opening. |
| composite volcano | a volcano constructed of alternating layers of pyroclastic debris and lava flows (also known as a stratocone volcano) |