Answer:
During liquid water is chilled, it bargains like one would expect until a temperature of around 4 degrees Celsius is reached.
After that, it spread out slightly until it accesses the freezing point, and then when it freezes it spread out by almost 9%.
Water molecules when it is in their quartz glass form have a six-sided type arrangement or open structure, because of this, water expands upon freezing and ice is less dense than water.