fermentation

bread, and alcohol such as wine and beer

what is yeast used to make

yeast, flour, water and sugar

what is bread dough made by mixing

anaerobic respiration also known as fermentation

what does the yeast use the sugars for

co2 and alcohol

what is produced in the fermentation

it is trapped in bubble within the dough making the dough rise

what happens to the co2

the yeast continues to ferment until the temperature of the dough is high enough to kill the yeast

what happens when the dough is baked in the oven

it evaporated away when baked

what happens to the alcohol

when yeast is added to the grapes or grain when you leave it to ferment the yeast respires anaerobically and uses the glucose to produce co2 and alcohol

how does yeast make wine and beer

mix together sugar, yeast and water in a test tube to create anaerobic conditions add a layer of oil to the top, attach a bung with a tube leading to a second tube of water, put the yeast mixture in a beaker and heat to 25 degrees celsius, count how many bubbles of co2 is produced in 1 minutes, repeat the experiment at different heats of water, the more bubbles produced in 1 minute the faster fermentation is taking place.

practical to investigate fermentation in yeast