Volcano Viscosity

When a volcano erupts the flow of the lava and magma determines on the viscosity. The silica determines if the viscosity is high or low. The lower the viscosity the more fluid the lava has. Low viscosity magma dissolves because is is very runny. When the magma dissolves it lets gases out, that where the gases come from. When magma has high silica and high viscosity it traps the gages because it is thick. Volcanoes erupts in several different ways. Of way is magma erupts hard fragments of rock. Volcanoes are considered extinct. Most volcanoes can erupt again just not likely too. I love to talk about this because volcanoes have always interested me and when learning about viscosity it helps understand it. It interested me that in the article I read it said that most volcanoes can come back to erupt again. I really did understand this article quite well. Arctile: "Volcanoes--Forces of Nature--Science, Maps, Photos, Video (National Geographic)." Volcanoes--Forces of Nature--Science, Maps, Photos, Video (National Geographic). N.p., n.d. Web. 25 Jan. 2013.(no author) xoxo, abby24