Due to the polar covalent bonds that hold a water molecule together, Hydrogen bonds form where the negative Oxygens and the positive Hydrogens are located.
Water is very cohesive.
This allows water to be pulled along a pathway with relative ease. The measure of how hard it is to break this interface is its surface tension. Water allows materials to rest upon it if the surface tension is not broken. Pollen, dust, water insects, and other biological materials are able to remain on the surface of the water because of this tension. The sticking of one substance to another.