Baking Soda, Baking Powder, and Yeast - Blowing Bubbles In The Name of Science (FAK Friday)

Bubbles!Leaven (lev-en): 1. a substance (as yeast) used to produce fermentation in dough or liquid. Or, a material (as baking powder) used to produce a gas that lightens dough or batter. Something that modifies or lightens. From the Latin, levare, meaning: to rise.In the kitchen, leavening means one thing: bubbles. Bubbles of gas which add lightness, and when exposed to heat expand