Physical and Chemical Changes
By H. Martinez and B. McCollum
Our favorite topic this year was chemical and physical changes. I know the most about chemical and physical changes , it was interesting to learn about. It was a fun experience learning how to tell chemical and physical from another. physical objects or substances undergo a change that does not change their chemical composition. This contrasts with the concept of chemical change in which the composition of a substance changes or one or more substances combine or break up to form new substances.