U.S. Department of Educat
10-10-2006, 03:20 PM
Lessons on how the sun's magnetism interacts with the earth's magnetic field, how scientists study ancient climates, how the earth system works and how climate changes over time, and how climate models are used to predict the future of earth's climate. (National Center for Atmospheric Research, supported by National Science Foundation)
More... (http://www.ed.gov/free/index.html)
More... (http://www.ed.gov/free/index.html)