Is freezing water into ice a physical change or a chemical change?

Freezing water into ice is a physical change because it only involves a change in the state of matter from liquid to solid. The molecular structure of water remains unchanged, as the H2O molecules are still intact. The freezing process does not create any new substance but simply slows down the movement of water molecules, causing them to form a solid structure. This transformation is reversible, meaning that the ice can melt back into liquid water, further confirming that it is a physical change rather than a chemical one.