Volcanos

The Volcano's Lava came from magma from the Earth's crust. The magma is from a really hot Rock and melted into magma. When the magma come to the Volcano it turns into lava that is cooler then magma. There are another volcano called supervolcano. It is a larger, bigger and more dangerous size and eruption. After volcano erupted it's lava turn into volcanic ash before it turn to obsidian. The volcanic ash is about less then 2mm. But the volcanic ash can make people really sick like Asthma or Emphysema. The Volcanic Ash and Gas is mixed became a volcanic plume which is the volcanic hot spot. Volcano eruption are one of the natural disasters that can be predicted like Tsunami. It uses scientific resources for predicting volcano eruption. There are volcano's that are extinct but it doesn't mean that it won't erupt again it is just resting like people.

Taken from:http://en.wikipedia.org/wiki/Volcanic_ash

http://en.wikipedia.org/wiki/Volcano

http://en.wikipedia.org/wiki/Supervolcano

http://en.wikipedia.org/wiki/Volcanic_plume

http://en.wikipedia.org/wiki/Volcano_prediction

http://en.wikipedia.org/wiki/Extinct_volcano