Teacher resources and professional development across the curriculum
Teacher professional development and classroom resources across the curriculum
Historically, some geologists noticed that the coastlines of Africa and South America looked as if they had been attached in the past. This implied that the two continental landmasses had moved apart at some point. Rock and fossil similarities between the coasts separated by oceans were further evidence for this idea. This was a revolutionary idea for its time, and it was not widely accepted until the 1960s because no mechanism had been put forward to explain why the coasts would have separated. Featured Scientists: Keith Klepeis, Ph.D. and David Sherrod, Ph.D.
D. Structure of the Earth: Crustal plates constantly move in response to the movements of the mantle.