Question

physical observations can be used to determine if a chemical change has occurred. true false

Explanation:

When a chemical change occurs, there are often physical manifestations. For example, a color change (like iron rusting from silver - gray to reddish - brown), the production of a gas (such as when baking soda reacts with vinegar and bubbles form), or the formation of a precipitate (when two clear solutions are mixed and a solid forms). These physical observations are clear indicators of a chemical change.

Answer:

True