More on geomagnetism from Fact Monster:

• magnetism - magnetism magnetism, forceof attraction or repulsion between various substances, especially those ...
• aurora borealis - aurora borealis aurora borealis and aurora australis, luminous display of various forms and colors ...
• solar wind - solar wind solar wind, stream of ionized hydrogen—protons and electrons—with an 8% ...
• geology: Evolution of Geology - Evolution of Geology Early Geologic Studies Observations on earth structure and processes were made ...
• dating: Absolute Dating - Absolute Dating Absolute dating can be achieved through the use of historical records and through ...

See more Encyclopedia articles on: Physics