Plant Systems Plant Life Cycle: The Great Plant Escape: Case #1 http://www.urbanext.uiuc.edu/gpe/case1/index.html Complete this case to discover the parts of a plant The Great Plant Escape: Case #3 http://www.urbanext.uiuc.edu/gpe/case3/index.html Complete this case to discover how a seed grows into a plant The Great Plant Escape:  Case #4 http://www.urbanext.uiuc.edu/gpe/case4/index.html Complete this case to discover how one plant can produce many other plants. Tree Rings: Intro to Tree Rings http://www.idahoforests.org/cookie1.htm Build a Tree Ring Timeline http://www.pbs.org/wgbh/nova/methuselah/treering2.html Reading Between the Rings http://www.domtar.com/arbre/English/une_annee_dans_la_vie_dun_arbre/anneaux_lecture.asp     Click on "A Year in the Life of a Tree" on the picture on the left.     Then click on "Annual Rings" on the picture on the left.     Click here to download student worksheet for this web site. Read Between the Rings Game http://www.domtar.com/arbre/english/annjeu.htm History of a Tree (with effects of fire, drought, insects, etc.):  http://www.arborday.org/trees/ringsLivingForest.html