Magma - Molten rock that has formed either in the mantle or the crust, Lava - Magma that has erupted onto Earth's surface, Volcano - Vent through which magma reaches Earth's surface, Magma Chamber - Underground reservoir of magma that can feed several volcanic eruptions over time, Tephra - Airborne ash and rock generated by volcanic eruptions, Pyroclastic Flow - Hot mix of ash, gas, and rock fragments that flows quickly down the slopes of a volcano, Shield Volcano - Short and wide volcano with gentle sloping sides made from erupting Basalt magma at diverging plate boundaries, Stratovolcano - Narrow tall volcano with steep sides made from Andesite magma erupting at subduction zones, Caldera - Collapsed volcanic cone made by violent eruption of Rhyolite magma at subduction zones, Dome Volcano - Steep and very rounded volcano made of viscous Rhyolite magma, Basalt - Very runny magma with a low silica content produced at divergent plate boundaries, Andesite - Magma with intermediate level of viscosity (stickiness) and a medium level of silica made under continental plates at subduction zones, Rhyolite - Very thick viscous magma with a high silica content produced under continental plates at subduction zones, Tuff - Rock made of ash that has fallen out of the sky in layers during eruptions, Ignimbrite - Rock made of welded ash formed during pyroclastic flows, Pumice - Light frothy rock made of Rhyolite magma with gas bubbles trapped in it, Lahar - Landslide of mud made when ash and water mix together on a volcano ,

Volcanoes

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