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3:2 Volcanoes
Volcanic Activity
Term | Definition |
---|---|
Magma Chamber | Pocket of magma beneath Earth's surface. |
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 Cloud | A super-heated cloud of ash, gas and rock. |
Active | A volcano that is currently erupting or likely to erupt. |
Dormant | When it is not erupting but capable of erupting in the future. |
Extinct | 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. |