Question

which of the following are signs of a chemical change? changes in odor, color, and temperature changes in size, shape, and state of matter changes in state of matter, volume, and mass

Explanation:

Chemical changes often result in new substances being formed. Changes in odor, color, and temperature are common signs as new chemical bonds are made or broken. Changes in size, shape, state of matter, volume, and mass can also occur in physical changes and are not exclusive signs of chemical changes.

Answer:

changes in odor, color, and temperature