A volcanologist studies volcanoes. He or she must learn about the Earth's interior and surface. In college, a person who wants to be a volcanologist would need to take many classes in sciences, especially geology, chemistry, and physics. Volcanologists study how volcanoes form. They look for signs of eruptions so that people living near a volcano can be warned. The job can be dangerous. Samples of lava and ash must be gathered from active volcanoes. When exploring an active volcano, safety clothing and gas masks must be worn. A .....