Plate Tectonics
Earth Structure: A Virtual Journey to the Center of Earth
Further Exploration
J. Louie at the Univ. of Nevada, Reno offers speeded-up recordings of earthquakes as MP3s.
Earthquake Hazards Program at the U.S. Geological Survey
Find information about current and past earthquakes, explore current methods and research.
Biography

Bruce Bolt

Classics
Journey to the Center of the Earth
An online version of Jules Verne's classic.
News & Events
Project Mohole: Drilling to the Moho
A summary from the National Academy of Sciences about the failed Project Mohole.
Are there nuclear reactors at Earth's core?
A Modest Proposal to Probe the Core
SpaceRef Daily
News from around the world of science.
Research
Earthquake Research at the U.S. Geological Survey
Ongoing research on crustal structure, seismology, and earthquake hazards.
Google - Research database allows searching of the scholarly literature.
Experiment!
Use Seismograms to Locate an Earthquake
UCLA Geology Labs On-line
Next Generation Science Standards (NGSS)
Earth Structure - Annotated NGSS Module
This annotated version of the Earth Structure module highlights how the three dimensions of NGSS are integrated throughout the text passages.
Next Generation Science Standards: For States, By States
National Academies Press: A Framework for K-12 Science Education