You will watch two Earth Revealed films. The first is called Earth’s Interior and shows how Geophysicists use seismic wave studies, variations in temperature, magnetic fields, gravity, and computer simulations to create models of deep structures. The second video called Plate Dynamics and includes discussion of convergent boundaries, subduction, hotspots, and the debate over what drives plate motion. There will be questions on the self-check quiz and credit unit assessment regarding these videos.