Final answer:
When water changes to ice, its density decreases and its volume increases.
Step-by-step explanation:
When water changes to ice, its density decreases and its volume increases. This is because water molecules in the liquid state are more closely packed and have more kinetic energy, resulting in a higher density. When water freezes, the molecules arrange themselves in a regular pattern, creating more space between them and causing the density to decrease. As a result, ice floats on water.
Learn more about Properties of water when it changes to ice