Wash Your Hands!
Age Appropriateness
8-10 years old
INTRODUCTION
Do you wash your hands EVERY time you use the restroom? How about before you eat? 95% of Americans say they do. However, only 67% of Americans actually wash their hands as shown in a study conducted by the American Society for Microbiology. So, many people say they wash, but in reality, many less do actually wash their hands. Washing your hands is one of the best ways to keep yourself from getting sick.
Biofilm
Age Appropriateness
10-12 years old
INTRODUCTION
Bacteria often grow in groups to better their chance of survival and spread their species more efficiently. A biofilm is a great example of this phenomenon. You probably have seen or felt biofilms in many places. Rocks in a stream are usually very slippery due to a biofilm on the surface. If it's been a while since you brushed your teeth, you can feel a thin coating on your teeth with your tongue or finger called plaque. The plaque you are feeling is another example of a biofilm.
