You will lava this little clip about volcanoes! It explains what a volcano is and describes the four different types. It also addresses how magma flows through a conduit, passes through a vent, and becomes lava. All of this takes place...

Dynamic music pumps up viewers as they learn about intrusive and extrusive igneous rocks. Presentation slides include a graphic depiction of magma below Earth's surface , photographs of lava exploding and flowing, and close-ups of...