What is Volcanic gas?
'''Volcanic gases''' are gases given out by active [[Volcano|volcanoes]] or sometimes not active volcanoes. They come from gases trapped in holes in volcanic rocks, dissolved or separated gases in [[magma]] and [[lava]], or gases coming from lava, volcanic craters, or openings. Volcanic gases can also be released through water heated by volcanic activity. [[File:Augustine Volcano Jan 12 2006.jpg|thumb|Volcanic gases going into the atmosphere with [[tephra]] during eruption of [[Augustine Volcano]], [[Alaska]] in 2006.]] Volcanic gases on Earth come from sources which include: * Gases from the [[Earth's mantle]], which include ancient and recycled materials. * Gases that are absorbed from the [[Earth's crust]]. * Gases taken from [[groundwater]] and the [[Earth's atmosphere]]. Volatile substances are materials that can turn into gas or release gases when heated. [[Category:Volcanology]] [[Category:Gases]]