You know you are looking at a chemical change when you can observe light, heat, odor, bubbling or fizzing, a color change, or production of a gas or solid.
Scientist know that most chemical changes can
break and form chemical bonds, cause changes in temperature, and other examples of what we can observe in the above statement.
Some examples of chemical changes are...
• burning paper
• rusting iron
• rotting eggs
• exploding firework
• tarnishing silver