petri dish results
DESCRIPTION
Students try to determine the place with the most germs. This PPT shows the results of two weeks growth in a petri dish. Viewer beware.TRANSCRIPT
WHERE IS THE “GERMIEST” PLACE AT MOUNTAIN PARK ES
?
5th grade TAG students ~ September 2014 ~
Procedure:1. Each student made an hypothesis as to the place in the school with the most germs.
2. Students took a damp cotton swab to that area and gathered a sample.
3. Students swabbed a petri dish containing agar with their “contaminated” cotton
swab.
4. Students also placed a dab of hand sanitizer on the petri dish.
The petri dish was covered and observed over a period of two weeks to see if bacteria would grow.
At the end of two weeks, the following photos were taken.
WARNING: These are gross, really gross.
If you have the strength to view the bacteria that grew in the petri dishes, proceed.
As you view the photos, see if you can tell where the students put the dab of hand sanitizer to stop the growth of bacteria.
See if you can find the “germiest” place at Mountain Park ES.
W A R N I N G
Warning, Warning !!!
Gross stuff ahead.
Turn back if you must.
Between the toes of a fifth grader
Bottom stair – 5th grade hall
5th grade bathroom – 1st faucet to the right
On the wall near Ms. Searcy’s board
Girls bathroom sink
5th grade toilet - poop
Ms. Weigand’s toilet seat
Computer lab A keyboard
5th grade bathroom – 3rd stall – girls’ bathroom – poop on the wall
Tricycle in 4th grade hall
3rd grade bathroom – 2nd stall - seat
Keyboard – lab A
Around the 3rd grade bathroom drain
2nd grade girls’ bathroom – 1st stall on the right
Front door of the school
Outside of cafeteria trash can
Library return counter
1st grade girls bathroom – seat in the first stall
3rd grade boys bathroom
1st grade bathroom - seat
Conclusion:
We don’t know what kind of bacteria grew in our petri dishes, but there was some pretty gross stuff.
The germiest place at our school is:
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