like earthquakes, most volcanoes are located along the 'ring of fire', a 40,000-kilometre stretch that encircles the pacific ocean.
however, there are many other regions with active volcanoes scattered around the globe.
a volcano is usually a mountain topped by a crater.
it erupts when lava and gases come out of a vent from a chamber of magma deep in the ground.
far below always under pressure. when the pressure becomes very great, it forces the magma and gasses violently out of a crack or vent, shooting them high into the air together with pieces of rock, ash and soil from around the vent and the surface.
like earthquakes, most volcanoes are located along the 'ring of fire', a 40,000-kilometre stretch that encircles the pacific ocean.however, there are many other regions with active volcanoes scattered around the globe.a volcano is usually a mountain topped by a crater. it erupts when lava and gases come out of a vent from a chamber of magma deep in the ground.far below always under pressure. when the pressure becomes very great, it forces the magma and gasses violently out of a crack or vent, shooting them high into the air together with pieces of rock, ash and soil from around the vent and the surface.
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