| what is yeast and how is it a raising agent? | it is a microorganism that release carbon dioxide and alcohol through the process of fermentation to help bread dough rise |
| yeast is a _______ raising agent | biological |
| describe the process of proving dough that contains yeast. | 1. let them sit in a warm environment and let fermentation happen
2. carbon dioxide is released gets trap and dough rises
3. when dough is bake, high heat kills yeast and end fermentation
4. causing CO2 in dough to enpand and alcohol to evaporate |
| what is bicarbonate of sodas | an alkali raising agent that breaks down when heated. CO2 bubbles form, and when they expand, mixture rises |
| what is baking powder? | conteians bicarbonate and cream of tartar (acidic substance). Heating it causes to neutralise |
| what is self raising flour? | flour + baking powder |
| in what 2 foods are steam and air used? | puff pastry, Yrokshire pudding |
| how does steam work? | -when very liquidy mixture are cooked in hot ovens, water escapes as steam. The rising steam helps to raise mixture
-mixture bakes and slidfy as water escape. If open oven, mixture sinks |
| give some examples of the ways to add air into food (mechanical process) | folding pastry into layers, folding technique for mixture, creaming, shortening, sieving, whisking |
