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VOLCANOES

Here is where you will recall how volcanoes form,types of volcanoes, and the igneous rock features of volcanoes.
AB
VentAn opening in the Earth's surface
Hot SpotThe boundary between the mantle and the outercore where magma rises.
Two important factorsthat control whether an eruption will be explosive or quietThe amount of water vapor and other trapped gases in the magma & how much silica is present in magma.
Sheild VolcanoGently sloping sides
Cinder VolcanoViolent eruptions
Composite VolcanoMount St Helens
Intrusive Igenous RockFormed from magma
Extrusive Igenous RockFormed from Lava
CalderaA large opening at the top of an inactive volcano
GPSGlobal Positioning System

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