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Volcanoes 6th

Volcanoes vocabulary flashcards

TermDefinition
Volcanoes Openings in the ground that release energy from deep within the Earth.
Core This is the center of the Earth and is as hot as the surface of the sun!
Crust This is the planet's rocky outer layer. It is relatively thin, and keeps the mantle material trapped below.
Mantle This is the layer between the crust and the core.
Magma Molten rock mixed with hot gasses, the bubbles rise.
Lava This is what magma is called when it reaches the surface.
Shield Volcano Thin streams of lava form flat mountains with broad slopes.
Shield Volcano Example Kilauea
Pyroclastic Flows Explosions of hot gasses and rocks, fast avalanches, thick lava and poisonous gas.
Stratovolcano Lava doesn't flow far, piling up in steep slopes.
Stratovolcano Examples Mount St. Helens, Pinatubo
Tectonic Plates Magma often forms near margins of these massive structures of Earth's crust and upper mantle.
Mid-Ocean Ridges This is where plates pull apart, these are the most volcanically active parts of Earth's crust.
Pacific Ring of Fire This huge volcanic area is fueled by collisions between denser oceanic and less dense continental plates.
Subducted This is when oceanic plates go under continental (land) plates.
Hotspot These happen far away from plate boundaries. They are either hot regions of mantle or weaker regions of crust.
Dormant A volcano that hasn't erupted in a long time.
Created by: Kempfer
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