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Cards In This Set
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Volcano
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A weak spot in the crust where magma has come to the surface
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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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Lava
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Liquid magma that reaches the surface; also the rock formed when liquid lava hardens
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Ring of Fire
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A major belt of volcanoes that rims the Pacific Ocena
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Island Arc
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A string of islands formed by the volcanoes along a deep-ocean trench
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Hot Spot
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An area where magma from deep within the mantle melts through the crust above it.
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Element
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A substance that cannot be broken down into other substances
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Silica
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Material found in magma that is formed from the elements oxygen and silicon
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Magma Chamber
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The pocket beneath a volcano where magma collects
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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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Vent
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The opening through which molten rock and gas leave a volcano
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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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Crater
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A bowl shaped area that forms around a volcano's central opening
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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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