using heat to burn a log in a fireplace using light to produce sugar in plants a cake that was baked from many ingredients a bottle that was broken into many small pieces
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: As part of a study, a scientist observed a number of different molecular changes in matter. Which of the following observations provides evidence of a physical change?
Possibilities:
- using heat to burn a log in a fireplace
- using light to produce sugar in plants
- a cake that was baked from many ingredients
- a bottle that was broken into many small pieces

a bottle that was broken into many small pieces