<human>:  What's 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 substance (sodium bicarbonate), while baking powder is a mixture of multiple ingredients, usually including sodium bicarbonate, an acid (such as cream of tartar) and a dough conditioner (such as cornstarch). Baking soda is much more alkaline than baking powder. When combined with an acid, baking soda releases carbon dioxide bubbles which cause baked goods to rise. On the other hand, baking powder contains baking soda, but includes other ingredients that cause it to react differently.