What is one effect of high water temperature on density?

High water temperature has the effect of decreasing density. When water is heated, the molecules gain energy and move more vigorously, which causes them to spread apart. This expansion leads to a reduction in the mass per unit volume, thereby decreasing the overall density of the water. As temperature rises, the water occupies a larger volume while the mass remains the same, resulting in lower density. This principle is essential in understanding various phenomena in aquatic systems, such as thermal stratification in lakes and the behavior of different water bodies under varying temperature conditions.