�ݺ�ߣ

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

5th grade bathroom – 3rd stall –
girls’ bathroom – poop on the
wall

3rd grade bathroom – 2nd stall -
seat

Around the 3rd grade bathroom
drain

2nd grade girls’ bathroom – 1st
stall on the right

Outside of cafeteria trash
can

1st grade girls bathroom – seat
in the first stall

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:
__________________________________

�ݺ�ߣ

Petri dish results

More Related Content

Petri dish results