Thursday, January 29, 2015

Food Safety Labs

The Danger Zone

We poured hot water into two separate containers. One container was shallow, and the other one was tall. My hypothesis was that the water in the shallow container would cool faster than the water in the tall container. The starting temperature of the water was 111° F. We used a digital thermometer to test the temperature of the water every 5 minutes.

After 5 Minutes
Tall = 102° F
Shallow = 92° F

After 10 Minutes
Tall = 102° F
Shallow = 85° F

After 15 Minutes
Tall = 97.5° F
Shallow = 79.1° F

After 20 Minutes
Tall = 94.1° F
Shallow = 77.7° F

The data supports my hypothesis, "The water in the shallow container will cool faster than the water in the tall container." This experiment showed us that we should store food in tight, small containers when putting it in the fridge because it will cool down faster.



Bacteria Colonies
We swabbed various objects around the school and observed the bacteria that grew.






1. The thing that surprised me the most about this lab was just how much bacteria is on everything. Even stuff that I thought was pretty clean still developed some pretty gross bacteria.
2. The place that resulted in the most bacteria was definitely the door to the girls' bathroom. The spot where people put there hand to open the door was really gross! There was a huge spot of fuzzy, moldy stuff growing bigger each day. It was nasty!
3. I learned a lot from this lab, and I will definitely be applying it. I think I'll seriously start making sure that I wash my hands before doing anything along the lines of eating or cooking. The objects that we tested were all things that I might touch on a daily basis. Just seeing how much bacteria is on them really makes me want to make sure I always wash my hands!

Hand Washing
This a video we made about how to properly wash your hands. Get rid of all the germs!
https://www.youtube.com/watch?v=BJjVII1Sysg




Dishwashing
This a video we made about how to properly wash dishes. Enjoy!


1 comment:

  1. In regards to the bacteria colony reply to these questions: What surprised you the most? What was the worst? What will you do with what you have learned?

    ReplyDelete