1. Volcanoes Yesenia mangarrez

2.  A volcano is a mountain that extends down to a pool of magma between the crust and mantle. It's basically a hole in the Earth from which magma can erupt. The name "volcano" comes from the name of Vulcan, a god of fire in Roman mythology.

3. Lava is made up of crystals, volcanic glass, and bubbles (volcanic gases). As magma gets closer to the surface and cools, it begins to crystallize minerals like olivine and form bubbles of volcanic gases. When lava erupts it is made up of a slush of crystals, liquid, and bubbles. The liquid "freezes" to form volcanic glass.

5. Chemically lava is made of the elements silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium (plus other elements in very small concentrations. Have a look at the background information in Minerals, Magma, and Volcanic Rocks

6.  Volcanism away from plate boundaries has also been explained as mantle plumes. These so-called "hotspots", for example Hawaii, are postulated to arise from upwelling diapirs with magma from the core–mantle boundary, 3,000 km deep in the Earth. Volcanoes are usually not created where two tectonic plates slide past one another

8.  However, once a volcano gets going, the mercury really starts to climb. Bright red lava flows in Hawaii can get as hot as 1,165 F, with the glowing orange flows getting hotter than 1,600 F, according to USGS.

9. Volcanoes are found along destructive (subducting) plate boundaries, constructive (divergent) plate boundaries and at hot spots in the earth's surface. The 'Ring of Fire' is a volcanic chain surrounding the Pacific Ocean.