Water is the only substance on earth that is lighter as a solid than a liquid.
Actually that is incorrect. A pound of water weighs the same as a pound of ice, melt the pound of ice and it still weighs a pound. Since water expands some when frozen it displaces more VOLUME and is the reason ice floats. This is why water pipes burst when they get frozen solid, it is due to the water expanding when it becomes frozen. Take a straight sided container of water and put it in the freezer, you will find the sides bulged out somewhat after it is completely frozen.
Water is the only substance on earth that is lighter as a solid than a liquid.
Actually that is incorrect. A pound of water weighs the same as a pound of ice, melt the pound of ice and it still weighs a pound. 1 cubic ft of water is 9% heavier than 1 cubic ft of ice. Ice is a solid, water is a liguid.Therefore, volume for folume,water is lighter when solid.
Water is the only substance on earth that is lighter as a solid than a liquid.
Actually that is incorrect. A pound of water weighs the same as a pound of ice, melt the pound of ice and it still weighs a pound. 1 cubic ft of water is 9% heavier than 1 cubic ft of ice. Ice is a solid, water is a liguid.Therefore, volume for folume,water is lighter when solid.But one cubic foot of ice is not one cubic foot of water when it melts down, due to the expansion properties of water turning to ice like I said earlier. However, when 1 pound of water is frozen into ice, it still weighs1 pound, so it did not get any lighter, it just expanded in volume size. That's why it floats. It is displacing more volume of water than it weighs.
Five pounds of water weighs the same as five pounds of feathers, lead, paper, ice, etc. The only difference is the volume of the materials being weighed regardless of the temperature at the time of being weighed. So water does NOT become lighter just because it freezes. It just occupies more space in frozen form than in liquid form, and occupies even more space when in vapor form, at normal atmospheric pressure, that is. But it still weighs the same.