Documents The Earth’s Oceans and Plate Tectonics Oceanography Unit #1.

Slide 1 Our Earth Earth is between 5.0 and 7.0 billion years old. Crust Mantle Outer core Inner core The Earthâs Crust Asthenosphere â an area of weakened crust and molten…

Documents The Earth’s Oceans and Plate Tectonics

Slide 1 Our Earth Earth is between 5.0 and 7.0 billion years old. Crust Mantle Outer core Inner core The Earthâs Crust Asthenosphere â an area of weakened crust and molten…