Question

what is theory of continental drift

Answer 1

Continental Drift was a revolutionary scientific theory developed in the years 1908-1912 by Alfred Wegener (1880-1930), a German meteorologist, climatologist, and geophysicist, that put forth the hypothesis that the continents had all originally been a part of one enormous landmass or supercontinent about 240 million years ago before breaking apart and drifting to their current locations.  Based on the work of previous scientists who had theorized about horizontal movement of the continents over the earth’s surface during different periods of geologic time, and based on his own observations drawing from different fields of science, Wegener postulated that about 200 million years ago this supercontinent that he called “Pangaea,” (which means “all lands” in Greek) began to break up.