* Chemical Change: Involves the formation of new substances with different chemical properties. The firework's components react with oxygen, breaking and reforming chemical bonds, leading to the release of energy in the form of light, heat, and sound. The original firework materials are transformed into entirely new substances.
* Physical Change: Only alters the form or appearance of a substance, not its chemical composition. Examples include melting ice (water changes state but remains H2O) or cutting paper (the paper is divided, but its chemical makeup stays the same).
In summary: The burning of a firework is a chemical change because it involves the creation of new substances (gases, ash, etc.) that are fundamentally different from the original firework components.
