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