Introduction:
The question I was trying to answer was “Is there more bacteria on a bathroom door or a keyboard at JHS?.” Things I already know about this subject is that a bacteria is a domain of unicellular, prokaryotes that have cell walls containing peptidoglycan (Miller and Levine, Biology Textbook).
Another thing I already know about this subject is that bacteria belong to the kingdom eubacteria (http://www.ric.edu/faculty/ptiskus/six_kingdoms/index.htm).
I believe there will be more bacteria on the keyboard than the girls’ bathroom door because I believe more people use keyboards and people are less unsanitary when using a keyboard because it is such a common item, that people think nothing to it.
Material and Methods:
Everything I used for this lab was a pen, notebook, petri dish, cotton swab, keyboard, and the girls bathroom door. For this lab, I got out my pencil and paper. I took the cotton swab and the petri dish. I used a permanent marker to divide and label my petri dish. I then walked to the girls’ bathroom door and used my cotton swab, and ran it across the door to collect bacteria. Next, I took the cotton swab and ran it across the “girls bathroom door” side of my petri dish. I then walked into a computer lab. I took my second cotton swab and ran it across the keyboard. I then took that cotton swab and ran it across the “keyboard” side of my petri dish. After collecting the date, I returned to the classroom. The next day, I collected my petri dish and observed the bacteria on it.
The Essay on Bacteria Petri Dish
Bacteria Bacteria are one celled organisms that are found almost everywhere. Bacteria live in soil, air, water and food. They also live in and on plants and animals. Bacteria can be found on our bodies in places such as our noses, mouths and intestines. Most bacteria measure from 0. 3 to 2. 0 microns in diameter. This means that bacteria can only be seen through a powerful microscope. Bacteriology ...
Discussion:
My hypothesis was correct because if you look at the results I got, you can see that there is by far more bacteria on the side labeled keyboard. Key information to take from this lab is to always sanitize before you use a keyboard or wash your hands after. What I’ve learned from this lab shows that all though a bathroom comes off as very unsanitary, a keyboard is more unsanitary because people don’t think much of it. I learned from this lab that next time I use a public keyboard or even my own, I will try my best to sanitize the keyboard before I use it. Also, sanitize it after I use it to prevent my bacteria from spreading to other people. Some errors that could have occurred in the data collection was that my cotton swab didn’t get the bacteria thoroughly. Also, when the petri dish was opened, bacteria in the air could have gotten into it and mess up the data.
