As part of our discussion on food borne illness, I did an experiment to demonstrate how bacteria multiplies at room temperature. I got the idea from FightBac.org resources which I told you about yesterday. I also show it with my Safety and Sanitation Power Point and Numbers to Know Prezi.
Some modifications for this time around...
- I didn't mess with the bowls of water. I simply left one bottle at room temperature and put one in the fridge.
- I had no sugar so I used corn syrup. It's a good reminder for students to see what they are drinking in soda!
- I mixed the ingredients right in the bottle instead of messing with a separate beaker.
We observed the bottles at 10 minutes:
And 45 minutes.
Because bacteria are invisible it is great to have such a visual reminder of the importance of cooling food quickly!