University of Oregon
The Electronic Universe Project: Plate Boundaries/plate Tectonics
Visit this site to learn more about the different types of plate boundaries. Includes color pictures and easy-to-understand examples of how and why plates move the way they do.
![Impact Tectonics: Earth's Interior, Gravity, and Magnetism [Pdf] PPT](https://d15y2dacu3jp90.cloudfront.net/images/attachment_defaults/resource/large/FPO-knovation.png "Impact Tectonics: Earth's Interior, Gravity, and Magnetism [Pdf] PPT")
Other
Impact Tectonics: Earth's Interior, Gravity, and Magnetism [Pdf]
Topics covered in this slideshow include the Earth's interior, seismic S- and P-waves, the crust and mantle, phase boundaries encountered by seismic waves, the Earth's internal heat, gravity and density, gravitational anomalies, the...
University of Calgary
University of Calgary: Energy Education: Geothermal Gradient
A good, concise explanation of the geothermal gradient and how and why the Earth's temperature gets hotter and hotter with increasing depth. Includes two diagrams showing this and the heat transfer mechanisms that are taking place.