Volcanoes blow their tops Volcanoes Blow Their Tops Why do Volcanoes Blow their Tops? I wonder why volcanoes blow their tops Other title：Volcanoes blow their tops I wonder why volcanoes blow their top 并列题名：Why do Volcanoes Blow their Tops? Volcanoes in the world I Wonder Why．Volcanoes Blow Their Tops How volcanoes blow off steam