PBS
Pbs Learning Media: See a Reversal
View a computer model simulation from NOVA Online that illustrates what happens during a magnetic field reversal, an infrequent occurrence that may be currently underway.
NASA
Nasa: Magnetic Reversals and Moving Continents
This site gives a good overview of magnetic reversals. Discusses continental drift, ocean floor magnetism, and sea-floor spreading.
PBS
Nova: Magnetic Storms: When Compasses Pointed South
Earth's magnetic poles have reversed themselves throughout its long history. Find out what scientists know about these reversals. A geologic time line shows when the reversals occurred.
Woods Hole Oceanographic Institution
Woods Hole Oceanography Institute: Hot Topics: Seafloor Magnetics
The earth's magnetic poles have reversed themselves throughout the earth's history. Find out how scientists know that this happened.
CK-12 Foundation
Ck 12: Earth Science: Earth's Shape and Magnetic Field Study Guide
This comprehensive study guide covers the main terms and concepts needed for an earth science unit on the earth's shape and magnetic field. Review questions are included at the bottom of the study guide.
National Earth Science Teachers Association
Windows to the Universe: Magnetic Field Reversals
Provides a short article, with embedded links, about magnetic reversals and how they might occur.
PBS
Nova: See a Reversal
The earth's magnetic field is due for a reversal. Find out what causes the magnetic field and view an animated model that shows it reversing.