Which of the following is an example of a chemical change? A- The shell of an egg breaks when it is struck against a hard surface.
B- Chocolate squares are melted to make cake icing.
C- Flour and sugar are sifted together into a measuring cup.
D- A mixture of flour, sugar, eggs, and butter is baked to become a cake.

D

Explanation:

It is D because once youve put together the ingredients and baked it you can not go in and taake out every ingredient and put it back to how it was before (Please also try to help me with my question it it about scaled copies, Please and thank you!)

I believe the answer is B. Chocolate squares are melted to make cake icing.

Explanation:

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.