Which observation most likely indicates that only a chemical change has taken place?(1 point) Responses States of matter changes. States of matter changes. The change cannot be reversed. The change cannot be reversed. A reaction occurs. A reaction occurs. The shape changes.

Answer 1

The observation that most likely indicates that only a chemical change has taken place is "The change cannot be reversed." While some physical changes are reversible, chemical changes typically result in the formation of new substances that cannot be easily reverted to their original forms.