Floating Paper Clips

Surface tension (and careful placement) allows these paper clips to rest on top of the water instead of sinking. Surface tension occurs because water molecules are attracted to one another in directions, which makes them cling to one another. However, water molecules at the surface are clinging only to molecules next to and below them. The strength of this adhesion creates a surface that can support small objects of greater density, such as paper clips. Surface tension is what allows water to form droplets or to rise above the top edge of a glass without spilling. Learn more about floating paper clips and surface tension at www.exploratorium.edu/ronh/bubbles/sticky_water.html.

 

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