if there is a crack in a rock, then water can get into the crack & when land period , that land expands ->  if water freezes in the crack of the rock, then water will expand in the crack  if water freezes in the crack of the rock, then water will expand in the crack & if land expands in a earthworms in a rock, then the stone will fix apart -> if water freezes in the crack of the rock, then the rock will break apart by water expanding when it freezes