5 sentences about the differences of chemical and physical changes

Answer 1

Chemical changes involve the formation of new substances with distinct properties, while physical changes only alter the appearance or state of a substance without changing its chemical composition. During a chemical change, bonds between atoms are broken and formed, leading to reactions such as rusting or combustion. In contrast, physical changes can include processes like melting, freezing, or dissolving, where no new substances are created. Chemical changes are usually irreversible or difficult to reverse, whereas physical changes can often be reversed easily. Overall, the key difference lies in the transformation of matter: chemical changes result in new materials, while physical changes retain the original substance.