As part of our Paddock to Plate unit of enquiry, we looked at how wheat grows, how it makes it to our plates, and different things it is used to make - bread, pizza dough, biscuits, doughnuts, cereal, cakes, muffins, cupcakes, wraps, pasta etc. We then looked at another ingredient used in the bread making process - yeast. Did you know that yeast is a living organism? We put on our scientist thinking hats and conducted a yeast experiment. We had zip lock bags with yeast in them, then added salt to some, sugar to some and cold and warm water to different bags. Then we waited... and waited... we observed some slight changes. We then added more yeast to each bag, and waited again. Some of the bags puffed up a little as the yeast bubbled and grew... then, just as the home bell went - one of the bags puffed up so much that we thought it was going to explode! It was super tight! After school, another one of the bags puffed up completely and was rescued from the classroom just in time! You could try these experiments at home. Would adding sugar and or salt change the speed or level of growth? Does warm water or cold water provide a faster reaction? Remember to keep a close eye on it!
Archives
October 2019
Categories |