Barnett - Vocabulary Practice for Magma, Volcanoes, and Intrusive Material
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| viscosity | resistance of a substance to flow
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| felsic magma | magma with a high silica content and large volume of gas (explosive eruptions)
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| mafic magma | magma with a low silica and gas content (non explosive eruptions)
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| tephra | solid material ejected from a volcano during an eruption
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| pyroclastic flow | fast moving body of hot gas, ash, dust, and rock that travels down the side of a volcano
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| volcanic blocks | solid material at least 64 mm in diameter ejected from a volcano
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| volcanic bombs | partial molten material at least 64mm in diameter ejected from a volcano
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| gas from volcanoes | water vapor, carbon dioxide, sulfur, and nitrogen
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| hot spot | unusually hot region of the mantle which causes rock to melt, rise, and form a volcano
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| convergent boundary | place where 2 tectonic plates are colliding - most volcanoes form at convergent boundaries
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| vent | place where magma is escaping from the crust
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| crater | bowl shaped depression around the vent
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| pipe | where magma rises from the magma chamber to the vent
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| neck | formed when the outside of a volcano erodes away and the solidified pipe remains
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| caldera | top or side of a volcano collapses forming a large depression
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| lava plateau | forms when magam escapes the Earth's crust through fissures (cracks) and builds a plateau
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| igneous rock | any rock that forms when magma or lava solidifies
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| pluton | intrusive igneous rock body
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| batholith | largest pluton
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| laccolith | mushroom shaped pluton, relatively small and close to surface
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| stock | pluton with irregular shape, but smaller than a batholith
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| dike | thin pluton that forms when magma enters a crack in rock; cuts through pre-existing material
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| sill | thin pluton that forms between parallel layers of rock
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| felsic igneous rock | igneous rock that contains mostly silica and is usually relatively light color and low density
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| mafic igneous rock | igneous rock that contains mostly magnesium and iron and is usually dark in color and dense
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| intrusive igneous rock | rock that cooled below earth's surface and has large (coarse) grains
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| extrusive igneous rock | igneous rock that cooled outside the earth and has small (fine) grains
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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