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volcanoes

Earth Science

Terms ;)Definition ;)
1 volcano A weak spot in the crust where molten material or magma comes to the surface
2 lava when magma reaches the surface
3 magma a molten mixture of rock forming substances, gases, and water from the mantle
4 ring of fire a major volcanic belt that was formed by the many volcanoes that rim the pacific ocean
5 hot spot an area where material from deep within the mantle rises and melts forming magma
6 shield volcano a wide, gently sloping mountain
7 composite volcano mountain formed by lava flows altering with explosive eruptions
8 cinder cone volcano cone-shaped hill or small mountain
9 sill When magma squeezes between horizontal layers of rock, it forms a sill
10 dike Magma that forces itself across rock layers hardens into a dike
11 batholith a mass of rock formed when a large body of magma cools inside the crust
12 lava plateau flows of lava solidifying and creating a large plateau
13 extinct unlikely to erupt again
14 dormant hasn't erupted in a while but can still erupt
15 active erupting or showing signs of erupting in the near future
16 viscosity The physical property of liquids
17 silica material found in magma that is formed from oxygen and silicon
18 pahoehoe a hot fast-moving type of lava
19 aa cool slow-moving type of lava
20 compound a substance made of two or more elements that have been chemically combined.
21 element a substance that can't be broken down into other substances
22 volcanic ash
23 magma chamber a pocket beneath a volcano where magma collects
24 crater A bowl-shaped area that forms around a volcano’s central opening.
25 vent The opening through which molten rock and gas l[eaves a volcano
26 pipe a long tube through which magma moves from the magma chamber to the earth's surface
27 caldera The large hole at the top of a volcano formed when the roof of a volcano’s magma chamber collapses.
28 hot spring A natural
29 geyser A fountain of water and steam that builds up pressure underground and erupts at regular intervals
Created by: 1966041764
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