1. The problem statement, all variables and given/known data Why do frozen water pipes burst? Would a mercury thermometer break if the temperature went below the freezing temperature of mercury? Why or why not? 2. Relevant equations Relation of volume to temperature 3. The attempt at a solution Water has its minimum volume at 4°C. Therefore, when the temperature drops below 4°C, the volume of the water increases continuously. Therefore, frozen water pipes burst. Mercury contracts when cooled, so a mercury thermometer would not break if the temperature went below the freezing temperature of mercury. Are these answers correct?