5: Plate Tectonics Last updated Save as PDF Page ID12751 5.1: Introduction to Plate Tectonics5.2: Understanding Earth’s Interior5.3: The Composition and Structure of Earth5.4: Theory of Continental Drift5.5: Sea Floor Spreading5.6: Earth’s Tectonic Plates5.7: Tectonic Plate Boundaries5.8: Earth’s Changing Surface5.9: Plate Tectonics Theory