The student is shown four pictures of the UNL Union plaza at various times of the year. Based on the length of the shadows, the student is asked to determine what time of year the picture was taken (the Autumnal or Vernal Equinoxes, or the Summer or Winter Solstices).
keywords: UNL, Union, Autumnal Equinox, Vernal Equinox, Summer Solstice, Winter Solstice
swf file: ca_coordsmotion_unionseasons.swf