physical changes

**physical changes**

Physical changes refer to alterations in the physical properties of a substance without changing its chemical composition. These changes can include variations in size, shape, state (such as melting, freezing, or boiling), texture, and appearance. Unlike chemical changes, physical changes are usually reversible, meaning the original substance can be restored. This tag is useful for categorizing content related to scientific concepts, especially in chemistry, physics, and biology, where understanding how matter transforms physically is essential.