<human>:  What is the difference between baking soda and baking powder?
<bot>: The main difference between baking soda and baking powder is that baking soda is a single ingredient, consisting of sodium bicarbonate, while baking powder is a mixture of sodium bicarbonate and an acid, such as cream of tartar. Baking soda requires an additional acidic ingredient and liquid to react and create the desired rising action in doughs and batters. Baking powder will create the same rising action without the need for an additional ingredient.