quinta-feira

Earth's Water Cycle - O ciclo da água na terra

Elementary:
http://www.windows.ucar.edu/tour/link=/earth/Water/water_cycle.html&edu=elem
Intermediate:
http://www.windows.ucar.edu/tour/link=/earth/Water/water_cycle.html&edu=mid
Advanced:
http://www.windows.ucar.edu/cgi-bin/tour_def?link=/earth/Water/water_cycle.html&sw=false&cd=false&fr=f&edu=high

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