What is Puddle?
[[Image:Pond in a forest clearing bgiu.jpg|thumb|250px|A puddle in a forest clearing]] [[Image:Vind i vand.jpg|thumb|250px|A water puddle on a Danish beach]] A '''puddle''' is a small mass of [[liquid]], usually [[water]], uncontained on a surface. It can form either in depressions in the surface, or directly upon the flat surface, held together by [[surface tension]]. A puddle is generally considered to be small enough to step over or shallow enough to walk through, and too small to traverse with a [[boat]]. Puddles commonly form during [[rain]]storms, and can cause problems for transport, especially when combined with cold conditions to form patches of [[ice]], which are highly slippery and difficult to see. {{science-stub}} [[Category:Water]]