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.)
Confidence votes 90. Continental drift is the movement of the Earth's continents relative to each other. The hypothesis that continents 'drift' was first put forward by Abraham Ortelius in 1596 and was fully developed by Alfred Wegener in 1912. However, it was not until the development of the theory of plate tectonics in the 1960s, that a sufficient geological explanation of that movement was found.