The volcano is one of the worst natural disasters. A volcano is a place on the Earth's surface (or any other planet's or moon's surface) where molten rock, gases and debris erupt through the earth's crust. Volcanoes change quite a bit in their structure, while some are cracks in the earth's crust where lava erupts, and some others are like domes, shields, or mountain-like structures with a crater at the top filled with lava and magma.
Magma is one of the things inside a volcano that spews out when it erupts except that it isn't magma when it comes out of the volcano it becomes something else similar called lava. It can melt a humans skin very easily because its temperature is 700 “degrees Celsius” - 1200 “degrees Celsius” at liquid form and 800 “degrees centigrade” - 900 “degrees centigrade” at solidus form.
Volcanoes can also form many rocks when the lava liquid becomes solid. Some of the rocks are igneous, metamorphic, and granite.
One of the worlds largest volcanoes is currently at Hawaii called Mauna lulu. Its 6 miles tall and has the greatest volume of any volcano which is 10,200 cubic miles.another amazing mountain is mt. saint. Helen which is the most active volcano in the USA.
