bread is a chemical change, not a physical change
Chemical.
Its a chemical change because its changing what it is (from dough to bread)
Baking dough into bread is a chemical change because the heat causes chemical reactions to occur in the dough, leading to the formation of new substances such as carbon dioxide and water vapor, resulting in the transformation of the dough into bread.
Classify it as chemical, the heat is used mainly to speed up the reaction.
Slicing bread is a physical change because it does not change the chemical composition of the bread.
Slicing bread is a physical change, because each slice of bread has the same chemical composition as it had before it was sliced.
Yeast rising bread works because yeast (an organism) converts starch to carbon dioxide which makes bread grow. This can be seen as a chemical reaction (yeast converting starch to CO2 gas) or a physical reaction (the CO2 making the bread expand).
Physical
chemical
No, slicing bread is a physical change. The act of cutting the bread into smaller pieces does not alter its chemical composition.
chemical change