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.)
Antonio Snider-Pellegrini's Illustration of the closed and opened Atlantic Ocean (1858). Continental drift is the movement of the Earth's continents relative to each other, thus appearing to drift across the ocean bed.The speculation that continents might have 'drifted' was first put forward by Abraham Ortelius in 1596.ntonio Snider-Pellegrini's Illustration of the closed and opened Atlantic Ocean (1858). Continental drift is the movement of the Earth's continents relative to each other, thus appearing to drift across the ocean bed.