sentence: Water adheres weakly to wax and strongly to itself, so water clusters into drops.
sentences_before: Rain water forms beads on the surface of a waxy surface, such as a leaf.
sentences_after: Surface tension gives them their near-spherical shape, because a sphere has the smallest possible surface area to volume ratio.
concept_name: water
headings: Surface tension Effects in everyday life Water
categories: Basic physics ideas‏‎ Fluid mechanics