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science 3
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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 |
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 volcano | 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 |