Question

law of conservation of mass
vacation or conservation (of mass): crash course kids #23...
product
the substance that forms in a chemical reaction
multiple - choice question
the cake ingredients (sugar, flour, eggs, milk) were examples of ________.
the reactants
the products
rewatch

Explanation:

In a chemical reaction context (even though baking a cake is a complex process with chemical aspects), reactants are the starting substances. Here, sugar, flour, eggs, milk are what you start with (like reactants in a reaction) to make the cake (the product).

Answer:

The reactants