Effervescent, I believe.
combustion
This reaction can be called "deoxidation" or "reduction".
a reactant
A chemical reaction that produces energy is said to be exothermic. In comparison, if it consumes energy it is endothermic.
Initiater
It is a old new molecule
an ion
The scientific name for the brown effect on food is Maillard reaction. It is a chemical reaction between amino acids and reducing sugars that gives browned foods their characteristic flavor and color.
Aerobic
The substances at the start of a chemical reaction are known as reactants. Reactants are the molecules or compounds that undergo a chemical change during the reaction. They are typically written on the left side of a chemical equation, while the products of the reaction are written on the right side. The reactants are consumed during the reaction to form the products.
Fire(Burning) is a chemical change. Once you burn a log, you won't get the log back, that's how it's a chemical change. Also, Fire needs Oxygen (O2) to burn and stay alive but with too much Carbon Dioxide (CO2) it will die out.
transmutation