What is one characteristic of a chemical change? you are welcome for the 50 points. unless you explain i will report your answer.

The ability of something able to burn is a chemical reaction. For example, if wood burns it is a sign of chemical change. If flammability isn't enough, another characteristic is reactivity. Reactivity can be seen when two substances are combined together, like when magnesium and water mix there is a huge explosion. 

Rotting. Rotting is a chemical change because it is a change in the chemicals, unlike melting (physical change.)