Final answer:
Smashing a piece of candy into a powder is a physical change because it alters the candy's form without changing its chemical composition.
Step-by-step explanation:
Smashing a piece of candy into a powder is a physical change, not a chemical change. When you smash a piece of candy, you are changing its form by breaking it into smaller pieces, but you are not changing its chemical structure or composition. A physical change does not produce a new substance, whereas a chemical change does through chemical reactions. Examples of physical changes include the melting of ice, the dissolving of sugar in water, and the tearing of paper, none of which results in a new substance. The same principle applies when a candy is crushed into powder; it remains the same substance, just divided into smaller parts.