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volcanoes/plate tec.

tells you basic volcano and plate tectonic vocal. for earth science

TermDefinition
volcano a mountain that forms in Earth's crust when molten material, or magma, reaches the surface.
magma a molten mixture of rock-forming substances, gases, and water from the mantle
lava when magma reaches the surface.
Ring of Fire One major belt of volcanoes. It includes the many volcanoes that rim the Pacific Ocean.
island arc The resulting of volcanoes sometimes create a string of islands called _______ ___.
hot spot an area where material from deep within Earth's mantle rises through the crust and melts to form magma.
magma chamber the place beneath a volcano where magma is collected
pipe a long tube that extends from Earth's crust up through the top of the volcano, connecting the magma chamber to Earth's surface. This is what magma moves upward through
vent molten rock and gas leave the volcano through this type of opening. Some volcanoes only have one central opening, but most have several coming through the sides of the volcano.
lava flow the spread of lava as it pours out of a vent.
crater a bowl-shaped area that may form at the top a volcano around the central vent.
silica a material found in magma that forms from the elements oxygen and silicone.
pyroclastic flow the mixture of hot gases, ash, cinders, and bombs that flow down the sides of a volcano when it erupts explosively
dormant also known as a sleeping volcano. This is a volcano that scientists expect to awaken in the future and become active.
extinct also known as a dead volcano. This volcano is unlikely to ever erupt again.
caldera the hole left when a volcano collapses.
cinder cone material can build up around the vent in a steep, cone-shaped hill or small mountain. this creates a ______ ____.
composite volcano a tall, cone-shaped mountain in which layers of lava alternate with layers of ash
shield volcano lava flows to build a wide, gently sloping mountain. This type of volcano is called a ______ _______.
volcanic neck this forms when magma hardens in a volcanoes pipe and the surrounding rock later wears away
dike magma that forces itself across rock layers hardens into a ____.
sill magma that squeezes between horizontal rock layers and harden to from a ____.
batholith a mass of rock formed when a large body of magma cools inside of the crust.
Created by: Giana.gabriel