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32 Cards in this Set
- Front
- Back
Caldera
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Large hole at the top of a volcano formed when the roof of a volcanoe magma chamber collapes.
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cinder cone
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A steep , cone -shaped hill or small mountain, made of volcanic ash, cinder, and bombs, piled up around a volcano's opening.
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Composite Volcano
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A tall cone shaped MT. in which layers of lava alternate with ash and other volcanic material.
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Shield Volcano
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A wide gently sloping mountain made of layers of lava and formed by quiet eruptions
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Volcanic Neck
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A deposit of hardened magma in a volcano's pipe.
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Dike
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a slab of volcanic rock formed when magma forces itself across rock layers
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Sill
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a slab of volcanic rock formed when magma squeezes between layers of rock.
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batholith
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a mass of rock formed when a large body of magma cools inside the crust.
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Geothermal activity
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The heating of underground water by magma
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geysers
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A fountain of water and steam that builds up pressure underground and erupts at regular intervals
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element
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a substance that cannot be broken down into other substances.
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compound
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a substance in which two or more elements are chemically joined
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Physical property
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any characteristic of a substance that can be observed or measured without changing the composition of the substance.
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chemical property
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any property of a substance that produces a change in the compostion of matter.
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viscosity
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The resitanced of a liquid to flow
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silica
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a material found in magma that is formed from the elements oxygen and silicon.
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pahoehoe
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a hot fast moving type of lava that hardens to form smooth ropelike coils.
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aa
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slow moving lava, hardens to fomr rough, chuncks, cooler than pahoehoe
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pyroclastic flow
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The expulsion of ash , cinders, bombs, and gases during and explosive volcanic eruption.
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dormant
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describes a volcano that is not currently active, but that may become active in the future.
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extinct
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describes a volcano that is no longer active and is unlikely to erupt again.
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crater
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a bowl-shaped area that forms around a volcano's central opening.
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lava flow
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the area covered by lava as it pours out of a volcano's vent.
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vent
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the opening through which molten rock and gas leave a volcano.
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pipe
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a long tube through which magma moves from the magma chamber to earth's surface.
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magma chamber
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the pocket beneath a volcano where magma collects.
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hot spot
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an area where magma deep within the mantle melts through the crust aove it.
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Island Arc
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a string of islands formed by the volcanoes along the deep ocean trench
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ring of fire
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a mjor belt of volcanoes that rims the pacific ocean
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lava
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liquid magma that reaches the surface also the rock formed when liquid lava forms
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magma
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the molten mixture of rock -forming substances ,gases, and water from the mantle.
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volcano
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a weak spot in the crust or magma that has come to the surface
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