Question

Which is an indication that a chemical change to a substance has occurred? A. It changes shape. B. New substances are formed. C. Energy is used or given off. D. both B and C

Answer 1

The answer would be D.

Step-by-step explanation:

Seven Things That Indicate a Chemical Change Is Occurring

Gas Bubbles Appear. Gas bubbles appear after a chemical reaction has occurred and the mixture becomes saturated with gas. ...

Formation of a Precipitate. ...

Color Change. ...

Temperature Change. ...

Production of Light. ...

Volume Change. ...

Change in Smell or Taste.