Vocbulary: asthenosphere fault folding seismic waves inner core crust Pangaea tectonic plates outer core volcanic mountains San Andreas fault system plate tectonics Questions: Describe the role of the asthenosphere in the movement of tectonic plates. How do fossils help prove that the continents move? What was Pangaea? What two features form when rocks bend? How does sea-floor spreading provide evidence that the continents are moving? Tectonic plates forming a transform boundary may move only a few centimeters each year. Can even this small movement affect people and communities living near a transform boundary? Explain your answer. If scientists were able to drill through the Earth’s crust, would it be easier to drill through oceanic crust or continental crust? Explain your answer. Explain the process of subduction.