Interdependence. Interdependence is a key idea in science. As students learn about science, they begin to understand that the earth is not a group of discrete parts but a continuous environment existing over time as well as place.
In order to remove the caffeine from coffee beans, the beans are washed in a solvent (a liquid capable of dissolving substances), transferring the caffeine from bean to liquid in a process known as extraction. To extract caffeine from whole coffee beans, the following solvents can be used:
The Complete Guide to Starbucks Caffeine. Starbucks has some of the highest caffeine amounts of any coffee chain. These charts were compiled using data from Starbucks in-store leaflets, their website, and from independent laboratory tests. Caffeine in coffee can vary (due to coffee bean origin and blend used) and may be more or less than the amounts shown.