The Five Second Rule: Fact or Fiction?
CSEF · 2019 Microbiology (General)
Overview
Objectives The goal was to see if a substance world be dirtier if it stayed on the ground longer. Methods Bananas, saltine crackers, petri dishes, swabs, and a heat lamp. I put a banana on the ground for five seconds and another banana on the ground for 20 seconds. I swabbed both bananas and repeated this process with the Saltine crackers. I then put them under a heat lamp for two weeks. Results The test subjects that were on the ground for only 5 seconds had less bacterial colonies grown then the test subjects that were on the ground for 20 seconds. Conclusions After 2 weeks of watching the growing Petri dishes I have found my conclusion. The Petri dishes that contained the 5 second test subjects had less bacterial colonies growing than the 20 second test subjects.
Summary statement
I showed that food that is on the ground for 5 seconds has less germs than food that is on the ground for 20 seconds.
Help received
My teacher explained that there are germs everywhere in the world and that germs attach to food instantly.
Competition history
- CSEF 2019
Resources
Related projects
CSEF · 2018
The Five Second Rule
CSEF · 2009
Is the Five-Second Rule a Myth?
CSEF · 2012
The Five-Second Rule: Safe or Sorry? Is Food Safe to Eat after Five Seconds on the Ground?
CSEF · 2002
The Five Second Rule: To Eat or Not to Eat?
CSEF · 2026
Five-Second Rule
CSEF · 2016
5 Second Rule! Does It Really Apply and Do Different Ground Surfaces Affect the Myth?
CSEF · 2008
Five Second Rule: Fact or Fiction?
CSEF · 2004
The Five Second Rule: Dry Food vs. Wet Food
Closest projects by meaning, across every fair and year in the corpus.
Browse more like this
Source: California Science & Engineering Fair public projects