Volcanoes

The first time a volcano erupts it blasts off its top. Some people think that a volcano is a deep pit with Magma inside of it, which it is not. A volcano is a mountain that forced itself through weak spots in the earth's crust. A volcano with non-vicious Magma inside it usually will be flat but also kind of cone shaped. A volcano with vicious Magma in it will most likely be cone shaped like the volcanoes shown in pictures and stuff (see below).
Magma and Lava have a very small difference: Magma is in a volcano and Lava is out. Since Lava is out of the volcano, it is a little cooler. Some volcanologists use the gas level around the volcano to tell if it will erupt.