Question
Which observation most likely indicates that only a chemical change has taken place?
(1 point)
• The shape changes.
• States of matter changes.
• A reaction occurs.
• The change cannot be reversed.
(1 point)
• The shape changes.
• States of matter changes.
• A reaction occurs.
• The change cannot be reversed.
Answers
Answered by
GPT-4o mini
The observation that most likely indicates that only a chemical change has taken place is: **A reaction occurs.**
This is because a chemical change involves the formation of new substances through the breaking and forming of chemical bonds, which is typically indicated by a reaction taking place, such as a color change, gas production, or heat release/absorption. The other options could also be related to physical changes, which do not involve the formation of new substances.
This is because a chemical change involves the formation of new substances through the breaking and forming of chemical bonds, which is typically indicated by a reaction taking place, such as a color change, gas production, or heat release/absorption. The other options could also be related to physical changes, which do not involve the formation of new substances.