DifferencesContinental Drift - Proposed by Alfred Wegener in 1912. - Suggests continents were once a single landmass (Pangaea) and drifted apart over time. - Lacked a mechanism to explain how continents moved.Plate Tectonics - Developed in the 1960s. - Explains that Earth's lithosphere is divided into tectonic plates that move over the semi-fluid asthenosphere. - Provides mechanisms for movement, such as seafloor spreading, subduction, and convection currents in the mantle.Similarities- Both theories suggest that continents have not always been in their current positions.- Both acknowledge the existence of past supercontinents (like Pangaea).- Both involve the movement of Earth's surface over geological time.