Is baking a cake batter chemical or physical change?

Baking a cake batter is a chemical change. Here's why:

* New Substances Form: The ingredients in the batter undergo chemical reactions during baking. For example:

* Flour and water form gluten, a protein structure that gives the cake its texture.

* Sugar caramelizes and browns, contributing to the cake's color and flavor.

* Baking soda or baking powder reacts with acid, producing carbon dioxide gas which makes the cake rise.

* Eggs solidify, contributing to structure and binding.

* Irreversible Change: Once a cake is baked, you can't simply reverse the process to get back the original ingredients. The chemical changes are permanent.

Physical changes involve altering the form or appearance of a substance, but not its chemical composition. Examples include melting ice or cutting a piece of paper. These changes are usually reversible.