A chemical change.
Why?
This is because in a chemical change the chemical formula is edited. While it is edited, compounds may be formed.
This answer was written in 2009 and may be subject to change due to future discoveries. It is not the fault of whoever answered this that this may be wrong in future discoveries.
A chemical change occurs when one or more substances change into new substances with different properties. An example of this is when powdered iron and sulphur are heated. They turn into iron sulphide.
chemical change
It is a chemical change.
a chemical change
Physical change.
substances
Change
two
A chemical change.
Substances that undergo chemical change are called reactants.
a chemical change
A change from one or more substances to another is a chemical change.
two
A chemical change produces a new substance with different properties than the original substance.
substances
Change
two
A chemical reaction is the change that takes place when different substances react with one another to form new substances. The substances that react in a chemical reaction are called the reactants and the new substances formed are called the products.
(Apex) interact
A chemical change.
The rotting of wood is a chemical change because of many reasons. One of the reasons is because when wood rots, it produces mold, which is a new substance. The definition of chemical change is a change that produces one or more new substances. When the wood rots, you are unable to take the rotted wood and mold and make it back into wood that is yet to be rotted. So because the wood produces one (or more) new substances, the rotting of wood is a chemical change.
A substance which enters into a chemical reaction is called a reactant.In a chemical reaction-also called chemical change- one or more reactants (the initial substances that enter into the reaction) change into one or more products (the final substances that are present at the end of the reaction).