Because the leaf is not burning.
It is a chemical change, a degradation of the compounds from the leaf.
Chemical
The change is leaf color is a chemical change.
chemical
The decay of organic matter such as leaves is a chemical change.
Chemical. It has to do with the closing of the part that connects the leaf to the tree and the lack of nutrients causes the leaf to turn colours.
If a silver colored ring turns your finger green it is a physical change that is caused by a chemical reaction.
The color change, though physical by itself, is caused by a chemical change of some colored substances in cabbage.
it depends its physical if you cut it and its chemical when you burn it
Photosynthesis makes a leaf green so when it turns brown it has stopped doing photosynthesis so most likely it is chemical change. Helpful enough? :|
chemical
It is a chemical change because the change of the color involve a chemical reaction.