How do germs spread from a sick person’s hand to another person?
cocoa powder; table set like restaurant; sink
Place one cup of cocoa powder in a large bowl. This powder represents germs on your hands.
Coat hands thoroughly in cocoa powder. Touch things as you would normally in a public restroom (sink, soap dispenser, etc.) and then at a restaurant table (utensils, chair, etc.). Notice how the powder comes to rest on various surfaces.
If there were two or more people participating in the experiment (each with a different colored powder), how quickly would their germs begin to move from one person to another?
How many surfaces in a public restroom or restaurant are touched by more than one person?
If the powder represented cold or flu germs, how easy would it be for a sick person to pass their germs onto a healthy person?
Try using different colors of cocoa powder or powdered sugar on the hands of different people. Which surfaces had the most “colors of germs” on them?
Take a look at our blog post tutorial for this activity and leave a comment with your stories and suggestions.