In February, our class studied germs. We attempted an experiment with bread and germs. I used a rubber glove to transport 1 slice of bread to a ziploc bag. This was our control. Then I washed my hands and moved another slice to another bag. Finally, we passed around a slice of bread. Each child, with unwashed hands, touched the bread. We watched and waited as our bread turned stale....we had hoped for mold. We anticipated the dirty hand bread would mold the fastest! Two months later, I decided it was time to toss out this experiment and try again with an apple. Mrs. Tucker is in awe by the absence of mold. She stopped me from throwing away the last piece of bread (the dirty hand bread). She added a few drops of water and is anxiously waiting for something to happen. I'll update you if it does.
So, back to our new experiment. The apple worked! This time, we were sure all of the apple slices would turn brown immediately and the dirty hands apple would brown the fastest! After 2 days, it was only slightly darker than the control and clean hands apple. But after 4 days, the effects of the germs were clear! Pictured below are Day 4 and Day 7.
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AuthorKatelyn Stephenson, Archives
February 2017
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