An overview of phenomena related to the magnetism of the Sun, in particular to sunspots and their 11-year cycle, solar flares and magnetic disturbances at Earth caused by "solar activity." ... This lesson plan supplements: "The Magnetic Sun," section #S-3: on disk Sun3mag.htm , on the web . ... About the 11-year sunspot cycle and its discovery. ... Terms: Sunspot, magnetic field lines, magnetic fields, sunspot cycle, solar activity, solar flare, magnetic storm, magnetic energy . ... from Earth . ...