Teacher resources and professional development across the curriculum
Teacher professional development and classroom resources across the curriculum
While it may seem contrary to our common experience, on average, soil only extends about one meter below the surface. Compared to the size of the Earth, soil is just an extremely thin veneer, or layer, on the surface. Featured Scientists: Oliver Chadwick, Ph.D., Andy Kurtz, Ph.D., and Elissa Levine, Ph.D.
D. Earth is layered and has a solid crust, hot, convecting mantle, and a dense metallic core.