>>12039621Ice is less dense because of (theoretical) lattice structure - ice has the molecules further spread out in a cube-like lattice, water has dynamic ring-like lattices which constantly break down and re-form
by volume, water, as
>>12040444 based trips anon said.
However, given a specific aliquot of water measured, then frozen, then measured again as ice, the weight will be the same, but the ice will have higher volume and thus reduced density
