Both baking soda and baking powder are raising agents, they are added to baked goods before cooking to produce carbon dioxide and cause them to 'rise'. Baking powder contains baking soda, but the two substances are used under different conditions.
You need to bake recipes which call for baking soda or baking powder immediately, or else they will fall flat!
You need to bake recipes which call for baking soda or baking powder immediately, or else they will fall flat!