Which of the following is an example of a chemical change?

Question

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

Answer 1

The option that represents a chemical change is:

B. A mixture of flour, sugar, eggs, and butter is baked to become a cake.

This process involves a chemical change because the ingredients undergo chemical reactions during baking, resulting in the formation of new substances (the cake), whereas the other options involve physical changes or processes.