Active - A volcano which has erupted recently, Friction - Resistance created when one surface rubs against another, Conduit - An underground passage through which magma travels , Vent - An opening through which lava pours  , Dormant - A Volcano which has not erupted for a long time, Extinct - A Volcano which erupted once but probably will never again, Erupt - Eject lava, ash and gases , Extreme - Very great. Significantly different from usual., Ash - A powder substance left after burning, Earthquake - Sudden violent shaking of the ground. ,

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