How many gearms do you eat if you do the five second rule
Eric Stahl
Grade 5
Presentation
Hypothesis
hypothesis
I think that there will be a lot of germs if I add them all together and alone so I think that it will not be safe I think. But maybe two seconds will problely have the least amount of germs and would be able to be eaten.
Research
What are gearms?
Gearms are tiny little organizemes which can cause disease in plants and animals,and people.
Bacterial coliforms and why they form.
Coliform bacteria are fascinating they can grow in lots of environments like soil, vegetation ,and even inside animals and our body. The can contaminate water food or even cheese. And can be used as a hygiene indicator. Now how they form is mostly from animal waste and sewage. In animal's they live in warm blooded animals an animal's waste can contaminate water and form these bacteria. The system's in the wastewater treatment plants can contaminate water and form coliform bacteria.
So let's talk about the types of bacteria and what they contaminate mostly!
- Total colifoarm: Envermental contamination
- Feacl Colifoarms: Feacl contamination/Seweage contamination
- E.coli: Feacl contamination/same as last one
Which bacteria is harmful to you and which is not?
The total Colifoarm bacteria is not that harmful it won't cause illness, but if contaminated with water could be more harmful to humans.
Now Feacl Colifoarms are ones you don't want to mess with if not taken care of it can result in diarrhea abdominal pain and feaver nausea and vomiting
Now E.coli is the exate same expet It gives you bloody diarrihea.
Parts of colifoarm bacteria cells
As you see above these are parts of bacteria like the cell wall thiers the Flagella which is like a mowter and helps it to move more information is on the picture but let's move on!
Who invented the five second rule?
so whats the origin of the five second rule? well reacherchers say that a guy named Genghis Khan which is the person that establesed the Mongol Empire! If his severs droped food on the ground and did it before 6 or 5 seconds they could pick it up and he would allow it beacause he bealved it would be safe to eat food that had been there for less then 6 seconds!
What is stagnant water?
Stagnant water is still water that is not runing lots of stagnant water is home to bacteria and parasites like Cryptosporidium and Giardia intestinalis which not taken care of can reasult in death. So you should ownly drink from runing water and not still water.
FUN FACTS
-Did you know that on your hand every day you get 229,000 germs from shaking hands and touching stuf in the public!
-Did you know that a fist bumb gives you less germs then a hand shake!
-Did you know that your saliva, tears , mucus ,and your ear wax contains a chemical that can kill off 90-95% Of germs!
Variables
apple
petri dish
phone/stop Whach
cutting board
Labler
gloves
Qtip
Manipulated variable
I put it in a different place every time. The time I put it on the ground for changes
Responding variables
sometimes if i change the time there will be less bactria groth and if I put it in a different place it may grow slower or faster
Procedure
Procedure
I put on gloves then I wash the apple I cut it into a little piece and then put the apple on the floor and put a stopwhach for 5/4/3/2 seconds then I pick up the apple from the ground and rube the side that got dirty along the the qtip and rube the qtip in the petri dish and then put it some where.
Observations
My observation is I started to notice that the bactria on the pectri dish was drying up and cracking after it sites there for a while and that there is a lot of gearms on the pectri dish on some of them and not a lot on others.
Analysis
How i am going to compare the amount of gearms is by useing a scarpie and draw little dots and that means if any bactria grows I know that the new ones that aren't under dots I will know that they aren't supost to be there.
And how I am going to see if I am doing the right amount of time for puting it on the floor is I am useing my phones stop whach.
Conclusion
Conclusion
I was right about there being a lot of germs but just by itself test subject #1 and 2 had the most and should not be eaten but test subject number 3 could be eaten it just matters what floor you put it on if its a floor that has a meidum amout of germs then number 3 (three seconds) could be eaten!
Application
Applications
I learned that you really sould not eat off of the floor even if you do the five second rule I don't recomend it. But if I were to do this again i would do all of the experments at once so the petri Dish dose not expier!
Sources Of Error
- I think i sould have done all of the exmrements at the same time because for second some how got more then the five second rule
- Some days I forgot to take a picture so I would wait and take a picture on the last day
- The printing meachine started to print pictures that were blue
- I could not do my last experement beacause the petri dish expiered
Citations
2.https://www.google.com/search?q=is%20total%20colifoar%20bad%20for%20your%20health?
3.https://www.google.com/search?q=is%20the%20feacl%20bactria%20harmful%20to%20humans
4.https://www.google.com/search?q=how%20harmful%20is%20e.coil%20to%20our%20bodys
6.https://www.google.com/search?q=what%20is%20stgnit%20wter
9.https://www.google.com/search?q=fun%20facts%20about%20germs
Acknowledgement
-My mom for helping me if I did'ent get something right/Presentation
-Mrs Arcuri for giving me good ideas
-Mrs Arevena for helping me
-Mrs lombardo for helping me
-And CYSF for alowing me to do the science fair