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18 Cards in this Set
- Front
- Back
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fumarole
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a vent that releases volcanic gases and steam
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pumice
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a light-colored volcanic rock containing lots of bubbles from trapped gases. This rock can sometimes float on water
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vent
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an opening at the surface where magma, gas and steam erupt
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cinders
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ashes that remain after a fire has burned out
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cinder cone
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a type of volcano that looks like a cone-shaped hill
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composite volcano
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a type of volcano that is made of layers of cinders and lava and looks like a tall mountain with steep sides
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shield volcano
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a volcano shaped like a bowl in the middle with long gently slopes made by basaltic lava flows, a rounded shape that is wider than it is high
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lahar
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a mixture of water and rock debris that forms on the slopes of a volcano. Also known as a mudflow or debris flow
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pyroclastic flow
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a hot, fast moving and high-density (thick like a dust storm) mixture of ash, pumice, rock fragments and gas formed during explosive eruptions
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dormant
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having a time without activity, such as a volcano that is not erupting
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erupt
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to pour or explode out of an opening
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extinct
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no longer alive or active, such as a volcano that scientists think will not erupt in the future
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ash
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fine-grained lava that erupts from a volcano in a gas cloud before settling on the ground, or that flows out
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basalt
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volcanic rock caused by partial melting of the Earth’s crust
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Ring of Fire
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a belt of volcanoes that rims the Pacific Ocean
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crater lake
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the body of water that gathers in the volcano’s crater when lava cools and blocks the vent
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extrusive rock
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lava that cools and hardens quickly on the surface
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intrusive rock
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magma that cools and hardens slowly within the crust
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