<human>:  What is the difference between baking powder and baking soda?
<bot>: The main difference between baking powder and baking soda is their chemical makeup. Baking powder is a combination of baking soda, acid, and a moisture absorber. Baking soda, on the other hand, is a simple chemical compound made of just sodium bicarbonate. Baking soda is a single-acting agent, meaning that it releases carbon dioxide gas as soon as it gets wet. Baking powder, on the other hand, is a double-acting agent, releasing carbon dioxide gas twice during the baking process—once when it gets wet and again when it is heated. This means that baking powder is more effective at creating airier baked goods that have a light and fluffy texture.