Template:POTD/2010-03-28
A paper clip on water, which appears blue here due to the colour of the glass, being held up by surface tension. Surface tension also keeps the water from overflowing the glass. It is caused by cohesion (the attraction of molecules to like molecules by various intermolecular forces.). It is what causes the surface portion of liquid to be attracted to another surface, such as that of another portion of liquid.Photo credit: Noodle snacks