You may want to print out and make copies of these resources that students will read in the lesson if your students don't have access to computers with Internet access: 1  The Greek Concept of Atomos: The Indivisible Atom. 2  The Atomists: Leucippus of Miletus and Democritus of Abdera. 3  Democritus of Abdera.
continental drift definition. A term, no longer used by geologists, that refers to the fact that continents are not stationary, but move across the Earth's surface. Continental drift is one feature of the modern theory of plate tectonics. (See Pangaea.)
Neither of these beliefs is true. The reaction to Alfred Wegener's Continental Drift Theory demonstrates that new ideas threaten the establishment, regardless of the century. Alfred Wegener was the scientist who proposed the Continental Drift Theory in the early twentieth century. Simply put, his hypothesis proposed that the continents had once been joined, and over time had drifted apart.