Simon Fraser University
Chem1 Virtual Textbook: Chemical Composition and Structure of the Earth
As part of the General Chemistry Virtual Textbook, this site examines a variety of topics related to the Earth. This page looks at the Earth and its lithosphere, the chemical composition of the Earth, the structure of the Earth, and more.
CK-12 Foundation
Ck 12: Earth Science: Earth's Layers
[Free Registration/Login may be required to access all resource tools.] Identifies the various layers of the Earth, including the crust, mantle, core, lithosphere, and asthenosphere.