October 11 2006
Is it really worth it?
Problem: How much bacteria do your hands pick up after you have already washed them?
Hypothesis: If different locations are tested, then your hands will pick up more bacteria at public
Locations- My home, friends home, a movie theater, 2 fast food restaurants, school
Type of swabs, agar, Petri dishes, temperature of the room, plastic bags, amount of
time in the incubator.
Amount of bacterial growth
Materials: goggles, swabs, agar, Petri dishes, pen, notepad, camera, plastic bags, incubator, pot,
stove, water, apron, and gloves.
First all materials need to be gathered so they are easily accessible. Next the agar
needs to be placed in the stove and filled with water until it reaches the agar line. The pot should
be placed on a stove, set to medium temperature, and let sit until the agar turns to liquid form in
about 30 min.
After 30 min. the agar should be poured into 18 separate Petri dishes, so that the