Lesson 2 Plate Tectonics – We learned that tectonic plates make up Earth’s lithosphere which contains the crust of the Earth and a small portion of the upper mantle. Plates are made up of oceanic lithosphere, continental lithosphere, or both. Continental lithosphere is thicker and less dense than oceanic lithosphere. The denser oceanic plate sinks into the mantle in the process of subduction which causes large earthquakes at the subduction zone. Volcanic mountains form on the overriding plate at these boundaries.
Assignment: Complete active reading prompts in science workbook.