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.)
Plate Tectonics is a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the asthenosphere. Continental Drift, however, is a theory developed by Alfred Wager who suggested that in the past, there was a super continent called Pangaea.