Online Teaching Materials
The Nano-CEMMS Center provides a variety of teaching modules for K-12 Classrooms. Click on a thumbnail below to load more information about our materials.
The production of chocolate is a 15 billion dollar business and Americans eat about 12 pounds of chocolate each year. Chocolate does have a shelf life; over time it can get a whitish appearance called "bloom," which makes it less desirable to many consumers. Understanding what causes bloom is thus an important concern for producers of chocolate. In this activity, chocolate has been stored in several conditions to see which conditions are more or less associated with bloom. Students view atomic force microscopy images of five samples of chocolate, examine the samples' appearance, and then taste the five samples.