In addition, the physical change of molding clay is generally reversible. This process changes the clay’s shape and state from a lump or slab into a specific, defined shape or structure. In other words, molding involves shaping the clay into various forms, such as pottery, sculptures, or other objects. The clay’s chemical composition remains the same before and after the molding process. When you mold a clay, there is no chemical reaction taking place. The sugar molecules in the crystals are the same as the ones in the dissolved sugar before crystallization.

More importantly, no new substances are formed during the crystallization of sugar. So, if you were to heat the sugar crystals, they would melt back into a liquid state without any chemical change occurring. Like all other physical changes, crystallization is typically reversible. This change from a liquid solution to solid crystals is a change in physical state. The sugar starts as a dissolved solid in a liquid (usually water) solution.Īs the solution cools or evaporates, the sugar molecules begin to arrange themselves into an orderly, repeating pattern, forming solid sugar crystals. The sugar molecules (sucrose) remain the same before and after the process. During the process of crystallization, there is no chemical reaction occurring. The crystallization of sugar is indeed a classic example of a physical change. Common Examples of Chemical Changes in Everyday LifeĮxamples of Physical Changes in Everyday Life.10 Differences Between Physical and Chemical Change with Examples.

5 examples of physical changes