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Volcano Unit1

QuestionAnswer
Volcano A weak spot in the crust where magma has come to the surface.
Hot Spring a pool formed by groundwater that has risen to the surface after being heated by a nearby body of magma.
Geyser a fountain of water and steam that builds up pressure underground and erupts at regular intervals.
Ring of Fire a major belt of volcanoes the rims the Pacific Ocean
Magma the molten mixture of rock-forming substances, gases, and water from the mantle.
Lava liquid magma that reaches the surface
Active said of a volcano that is erupting or has shown signs of erupting in the near future
Dormant said of a volcano that does not show signs of erupting in the near future
Extinct said of a volcano that is unlikely to erupt again
Shield Volcano a wide, gently sloping mountain made of layers of lava. Formed by quiet eruptions.
Cinder Cone Volcano A steep, cone-shaped hill or mountain made of volcanic ash, cinders, and bombs piled up around a volcano's opening
Composite Volcano a tall, cone-shaped mountain in which layers of lava alternate with layers of ash and other volcanic material
Caldera the large hole at the top of a volcano formed when the roof of the volcano's magma chamber collapses.
Quiet Eruption -Magma flows easily -Lava oozes quietly from the vent. -Produce two types of lava: pahoehoe and aa
Explosive Eruption violent eruptions that produce thick sticky lava forming ash, cinders, and bombs.
Pahoehoe Lava a hot, fast moving type of lava that hardens to form smooth, ropelike coils.
aa lava a slow-moving type of lava that hardens to form rough chunks; cooler than pahoehoe
geothermal energy energy from water or steam that has been heated by magma
Hot Spot an area where magma from deep within the mantle melts through the crust above it.
Created by: tbrownccms
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