| Answer | Crossword Clue |
|---|---|
| SCUM | Film on the surface of a liquid |
| PATINA | Film on copper surface. |
| RHUMB | Curve on the surface of a sphere |
| WATERWAVER | Quiver on the surface of a pool? |
| ADSORBS | Gathers on the surface, as a layer of molecules |
| DAP | Skip, as a stone on the surface of water. |
