It looks like you're using Internet Explorer 11 or older. This website works best with modern browsers such as the latest versions of Chrome, Firefox, Safari, and Edge. If you continue with this browser, you may see unexpected results.
Volcano is a place where ash, gases, and molten rock from deep underground erupt onto the surface.
CITATION: Rowland, Scott K. "Volcano." World Book Student. World Book, 2015. Web. 2 Dec. 2015.