1.Volcanoes are built from quiet flows of thin,runy lava that spread over a  broad area.
2.Volcanoes are formed from violent eruptions.
3.Volcanoes made  mostly  of cinders and other rock particles that have been blown into the air.
4.Volcanoes  is often a funnel-shaped pit or despression at the top of volcano cone.
5.When a volcano explodes a caldera were form.
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