A day passed. Let's see the state of the petri dish.
- Control experiment (condition not doing anything)
- Stairway railing
- Door knob
- Smartphone (screen)
- Hand (before hand wash)
- Hand (after washing hand)
- Hand (after soap washing)
- Cutting board
- Key board
Wow! Is this white bacteria?
Let's summarize things that can be thought of experiments (= considerations) on the next page.
Let's think!
What can we learn from this experiment?
