دانلود پاورپوینت لاتین آتش فشان ها volcanos تعداد اسلاید : 8 قسمتی از متن اسلاید ها : Volcanoes are often cone-shaped, but they can take other shapes too. They are formed when molten, sticky rock called magma, forces its way through a crack in the Earth’s crust. The melted rock that spills out