Question

Three to five sentences compare and contrast chemical and physical changes

Answer 1

Chemical changes involve the transformation of substances into new products through chemical reactions, resulting in changes to the molecular structure. Examples include rusting iron or burning wood, where the original materials cannot be easily reverted to their initial forms. In contrast, physical changes do not alter the chemical identity of a substance; instead, they only affect its physical properties, such as shape, state, or size. Examples include melting ice or dissolving sugar in water, where the original substances remain intact at the molecular level. Ultimately, while both types of changes can alter how substances appear or behave, the key distinction lies in whether or not new substances are formed.