What is the density of water and why does ice float on water? The density of liquid water varies with temperature. Differences in temperature will cause the water to separate itself into layers. This causes a temperature gradient within a container. Thermal expansion causes substances to increase in volume as they heat up. When volume increases, density decreases for a fixed mass.

Ice floats on water because when it freezes its density decreases. Expansion on a phase transition to a solid is an unusual phenomenon. Water increases in volume. This lowers its density and causes it to float. This is why ice floats in water.

The density of a substance is based on the mass and volume of a substance. As the temperature of a substance changes, this will change the volume of the substance, which in turns changes the density.

The thermal expansion of water creates a gradient that supports aquatic life. This is why a swimming pool feels colder as it gets deeper.

Chapters
0:00 Quick Summary
0:25 Temperature and Pressure
0:54 Change in Density Graph
1:18 Temperature Gradient Experiment
2:42 Atomic Motion

Keywords
#scienceexperiment #density #water

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