This page will go over the testing procedure

Hypothesis: If the three top hand sanitizers are tested, then Purell will be the most effective.

Materials:

• Cotton swabs
• Test Subjects
• Petri dishes
• Agar

Procedure:

1. Gather the types of hand sanitizers
2. take a control swab of each persons hand before testing
3. Put each swab in agar in a petri dish
4. Label each swab by the type of sanitizer, or "control"
6. Test subjects will clean their hands as instructed by the hand sanitizers
7. Take another swab of their hands
8. Incubate them in petri dishes for 48 hours
9. Compare all control swabs and hand sanitizer swabs by counting bacterial colonies
10. Do this one more time

Independant Variable:

Type of hand sanitizer

Dependant Variable:

Amount of bacteria left

Controls:

• Amount of time the petri dishes are left to incubate
• Amount of swab
• Amount of agar