National Geographic
National Geographic: Encyclopedia: Core
Understand the characteristics and features of Earth's core from this detailed article. Includes high-quality illustrations, a downloadable poster, a video, and links to other resources.
Science Education Resource Center at Carleton College
Serc: Why Is the Earth Still Hot Inside?
In this lesson, students conduct heat transfer experiments to investigate why the Earth is still hot at its core, even after billions of years since its formation. They will learn that the rate of heat transfer is dependent on an...
CK-12 Foundation
Ck 12: Earth Science: Geothermal Power
[Free Registration/Login may be required to access all resource tools.] Presents the way geothermal energy is harnessed and some of its benefits and costs. Downloadable resources are also available.
Other
Physics World: Radioactive Decay Accounts for Half of Earth's Heat
Find out about the source of heat from the Earth's core. (Published 19 July 2011)