Presentation on theme: " Physical changes – end products can be changed back to what you started with › Ex: water changes to ice (can change back) Chemical changes – end up."— Presentation transcript:
Physical changes – end products can be changed back to what you started with › Ex: water changes to ice (can change back) Chemical changes – end up with an entirely new product at the end › Example : iron & water = rust (can’t change back)
Chemical change Baking soda, or bicarbonate of soda Used when the dough or batter contains an acidic ingredient, like buttermilk, lemon, brown sugar, sour cream, or yogurt. The soda (base) combines with the buttermilk (acid), to produce carbon dioxide & the baked goods rise.
Chemical change Used in cookies, quick breads & other baked goods Made of baking soda & cream of tartar Generally double action - means it releases carbon dioxide when mixed with liquid & when exposed to heat
Chemical change Fungus Slow process Converts small amounts of sugars in the dough to carbon dioxide & alcohol – fermentation Carbon dioxide trapped in the dough makes it rise Alcohol evaporates in the oven
Physical change Water changes to steam to create small bubbles which cause the baking products to rise
Leavening agents – baking soda & baking powder Buttermilk vs regular milk pancakes Which will work the best? And in what combinations do they work best? Let’s find out!