ICELAND MID-OCEANIC RIDGE
Hydrosphere presentation
http://www.teachersdomain.org/resource/idptv11.sci.ess.earthsys.d4kwat/
The importance of water: short and beautiful video
http://www.youtube.com/embed/MOKseXu8FOs
Water density activity
http://www.middleschoolscience.com/dietcoke.htm
Lab activity about density
Hydrosphere: prezi presentation
Water distribution USGS
Surface tension
Water footprint
Water cycle