Activity comparing electromagnetic and gravitational forces.
http://www.sciencepartners.info/?page_id=430 (structure of water visual)
http://water.usgs.gov/edu/waterproperties.html (cohesion/adhesion explanation and visuals)
Jones, M.G., Falvo, M.R., Taylor, A.R. & Broadwell, B.P. (2007). Nanoscale science: Activities for grade 6-12. National Science Teacher Association. 89-94.
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