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ScienceVolcanoes 6th

Volcanoes for sixth graders!!!!!!!!!!!!!

WordDefinition
Volcano A weak spot in the crust where magma reaches the surface.
Ring of Fire A major belt of volcanoes.
Island Arc The resulting volcanoes create a string of islands.
Hot Spot It is an area where material forms deep within the mantle rises and then melts forming magma.
Element A substance that can not be broken down.
Compound A substance made up of 2 or more elements that have been chemically combined.
Physical Property Any thing that can be observed or measured without changing.
Chemical Property Any property that produces a change in the composition of matter.
Viscosity The resistance of a liquid.
Silica It is made up of the elements oxygen and silicon.
Pahoehoe Fast moving lava with low viscosity.
Aa Slow moving cool lava with low viscosity.
Magma Chamber Magma collects in this.
Pipe A long tube that connects to the magma chamber.
Vent Molten lava and gas leave through here.
Lava Flow It is the area covered by lava as it flows out.
Crater A bowl shaped area that may form at the top a volcano around the central vent.
Pyroclastic Flow It occurs when an explosive eruption occurs.
Dormant They expect that these will erupt in the future.
Extinct A dead volcano that is unlikely to erupt.
Shield Volcano A wide gently sloping mountain.
Cinder Cone Volcano A cone shaped hill or small mountain.
Composite Volcano Tall cone shaped mountains in which layers of lava alternate with ash layers.
Caldera The huge hole left by the collapse of a volcano.
Volcanic Neck It forms when magma hardens in a volcano's pipe.
Dike Magma that forces itself across rock layers and hardens.
Sill When magma squeezes between horizontal layers of rock.
Batholith A mass of rock formed when a large body of magma cools inside the crust.
Geothermal Activity Magma a few kilometers beneath Earth's surface heats underground water.
Geyser A fountain of water and steam that erupts from the ground.
Created by: 100003939754038
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