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Science C5 L1-3

don't meander to the door

volcano a weak spot in the crust where magma has come to the surface
magma the molten mixture of rock-forming substances, gases, and water from the mantle
lava liquid magma that reaches the surface
Ring of Fire a major belt of volcanoes that rims the Pacific Ocean
island arc a string of volcanoes that form as the result of subduction of one oceanic plate beneath a second oceanic plate
hot spot an area where magma from deep within the mantle melts through the crust above it
magma chamber the pocket beneath a volcano where magma collects
pipe a long tube through which magma moves from the magma chamber to Earth's surface
vent the opening through which molten rock and gas leave a volcano
lava flow the area covered by lava as it pours out of a volcano's vent
crater 1. a large round pit caused by the impact of a meteoroid 2. a bowl-shaped area that forms around a volcano's central opening
silica a material found in magma that is formed from the elements oxygen and silicon; it is the primary substance of Earth's crust and mantle
pyroclastic flow the flow of ash, cinders, bombs, and gases down the side of a volcano during an explosive eruption
dormant not currently active but able to become active in the future (as with a volcano)
extinct 1. term used to refer to a group of related organisms that has died out and has no living members 2. Term used to describe a volcano that is no longer active and unlikely to erupt again
caldera the large hole at the top of a volcano formed when the roof of a volcano's magma chamber collapses
cinder cone a steep, cone-shaped hill or small 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 materials
shield volcano a wide, gently sloping mountain made of layers of lava and formed by quiet eruptions
volcanic neck a deposit of hardened magma in a volcano's pipe
dike a slab of volcanic rock formed when magma forces itself across rock layers
sill a slab of volcanic rock formed when magma squeezes between layers of rock
batholith a mass of rock formed when a large body of magma cools inside the crust
Created by: lhanna100