Just heating the metal would be a physical change, as you would only have a warmer iron III oxide. However, if the heat caused a reaction, it would then be a chemical change.
physical or chemical
physical or chemical
Iron is a chemical element, not a "change" !
Iron is a chemical element, not a "change".
Steel wool rusting is a chemical change because it involves a reaction with oxygen to form iron oxide. This results in a change in the chemical composition of the steel wool.
Melting iron is a physical change because it does not alter the chemical composition of the iron. It is a change in state from solid to liquid without forming a new substance.
Since the chemical structure of the iron (Fe) does not change, it is a physical change. I would like to point out that this does make the likelihood that a chemical change will take place higher, more energy equals a faster phase transformation. If the iron it is sitting in air, the outer surface is likely under going a chemical change into iron oxide (FeO, Fe3O4, and Fe2O3) more commonly known as rust. Hence, iron as with most metals is found as Iron oxide and processed into Iron. More facts about iron can be found here: http://en.wikipedia.org/wiki/Iron
It is a chemical change.
no it is a chemical change
it is a chemical change
Physical.