Volcano Vocab Flashcards updated
It is a very educational study guide for people who need help with volcanos.
Terms in this set (32)
A weak spot in the crust where magma has come to the surface ;which forms a mountain
the hot fluid material that is found within the crust of the earth.
the scientific word for the molten rock that spurts from volcanoes
Ring of Fire
the linear zone of seismic and volcanic activity that coincides in general with the margins of the Pacific Plate.
a curved chain of islands, as the Aleutians or Antilles, usually convex toward the ocean and enclosing a deep-sea basin.
A volcanic area that forms as a tectonic plate moves over a point heated from deep within the Earth's mantle.
the magma in the earth's crust where the magma may reside temporarily on its way from the upper mantle to the earth's surface
a vertical cylindrical passage in a volcano through which molten lava is forced during eruption
an opening at the earth's surface from which volcanic material, as lava, steam, or gas, is emitted.
The area covered by lava as it pours out of a volcano's vent.
the bowl-shaped opening at the top or side of a volcano or top of a geyser through which lava and gases are emitted
that molten rock, that is lava, contains as it is thrown out or ejected from volcanoes
A pyroclastic flow also known as a is a common and devastating result of some volcanic eruptions.
A volcano that is inactive but may become active in the future
An extinct volcano is one that is completely done with volcanic activity and won't erupt again.
A caldera is a large, usually circular depression at the summit of a volcano formed when magma is withdrawn or erupted
Cinder cone volcano
A cinder cone or scoria cone is a steep conical hill of volcanic fragments that accumulate around and downwind from a volcanic vent.
A large volcanic cone built by extrusion of alternating layers of ash and lava.
A broad, domed volcano with gently sloping sides, characteristic of the eruption of fluid, basaltic lava
A massive pillar of rock more resistant to erosion than the lavas and pyroclastic rocks of a volcanic cone.
A slab of volcanic rock formed when magma forces it self across rock layers
A slab of volcanic rock formed when magma squeezes between layers of rock.
A mass of rock formed when a large body of magma cools inside the crust.
Measurement of particle size applied to the finest pyroclastic material, fragments less than 0.08 inches (2mm) in diameter, blasted into the air by volcanic explosions.
Volcanic rock poor in silica but rich in magnesium, iron, and calcium. The most common volcanic rock.
Turbulent low-density cloud of gas with suspended solid debris that expands radially outward from the base of an eruption column. Comparable to the ring that forms at the base of the cloud formed by a nuclear explosion.
Fragment of magma varying in diameter from a few inches to several feet ejected into the air during a volcanic explosion
Intermittent vertical jet of water produced by the heating of underground water by geothermal activity.
Indonesian word for a volcanic mud flow usually formed when an eruption melts part of a glacier on a volcano. These flows involve large quantities of volcanic material and can move at high speeds.
Frothy volcanic rock heavily vesicled formed by the expansion of gas in erupting lava.
Dark, vesicled volcanic rock produced by moderately explosive activity or lava flows and resulting from blobs of gas-charged lava that have cooled in flight.
Small fragments of lava ejected from a vent. Spatter is still molten when it falls to the ground thus forming cones or hornitos.
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