Weather experiment: hot water rises (convection)

Water Cycle (3 outstanding diagrams by the USGS)

A good diagram made by the U.S. Geological Survey (Get a poster here) :

and a more simple one by the same organization:


























and a very useful interactive diagram, also made by U.S. Geological Survey:
http://ga.water.usgs.gov/edu/watercycle-kids-int.html

Earth's Water Cycle (by NASA)

Water Cycle

to read an explanation go to: "Water cycle" on Simple Wikipedia