What is the function of the peripheral system and its function? peripheral nervous system is all the nerves located outside the  central nervous system; connects the central nervous system to all  the parts of the body. 1 person found this useful.
Volcanoes are formed when magma from within the Earth's upper mantle works its way to the surface. At the surface, it erupts to form lava flows and ash deposits. Over time as the volcano continues to erupt, it will get bigger and bigger.
Earthquakes and Volcanoes Key Concept What causes volcanoes to form? Directions: Use the diagram to answer each question on the lines provided. 1. Why does magma move upward? 2. What happens when magma erupts on the surface? 3. What is a volcano? 4. Where do volcanoes form? 5. How is the mid-ocean ridge shown in the diagram formed? 6. How does low pressure cause volcanoes to form? 7.