Objective
Determine the effectiveness of different handwashing techniques in removing bacteria.
Materials
- Petri dishes
- Agar
- Soap (liquid and bar)
- Hand sanitizer
- Cotton swabs
- Notebook for observations
Instructions
- Prepare agar in Petri dishes according to the instructions.
- Divide participants into groups to test different handwashing techniques (e.g., no washing, water only, soap and water, hand sanitizer).
- Swab each participant’s hands before and after washing and streak the swabs onto the agar plates.
- Incubate the Petri dishes at room temperature for a few days.
- Observe and record the growth of bacterial colonies in each Petri dish.
- Compare the effectiveness of each handwashing technique by analyzing the bacterial growth.
- Present your findings in a report, explaining which techniques were most effective at reducing bacteria.