Evidence of a Chemical Change

The four evidences of chemical change

Production of a Gas

When bubbling and fizzing occurs, the substance is producing gas. Prodution of gas is one piece of evidence that a chemical change has occured. The photo to the right➡️ is from about.com. This picture shows a baking soda and vinegar volcano.

Color Change

Another piece of evidence is color change. When two or more substances combined and change color, a new substance is created. This image is from harpercollage.edu

Others include.......