Why Does Water Expand When It Freezes

yes, ice has lesser density than water when it freezes? OK………….STOP THE BUS……..its GREATER density when it freezes. It has less vibration and movement. As it happens, it is the vessel allowing expansion. If you freeze water in a fully contained metal box (for example).then when frozen…it will be the same dimensons, other than .05mm – .5mm. The vessels material is the difference. In open air then many variables are of contribution