Does Water Expand When It Freezes?

Yes, water expands when it freezes. Note that the word expands here indicates an increase in volume. So, a technically sound way to put it would bewaters volume increases when it freezes. This statement is accurate, and you can test its legitimacy with a simple experiment: if you lower the temperature of the water, you will notice that the volume of the water decreases as it becomes more and more intact.

Thus, water expands when it becomes ice, and as the volume is inversely proportional to the density of a substance, ice is less dense than water. For this reason, ice, a substance that appears heavier than its liquid form, floats on water.