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:
Extracting (almost pure) Caffeine from Caffeine Pills. Favorite I Made it! Intro: Extracting (almost pure) Caffeine from Caffeine Pills. DON'T DO THIS IF YOU ARE NOT 100% SURE THAT THE SOLVENT YOUR USING EVAPORATES COMPLETELY LEAVING NO TOXIC RESIDUE! ALSO, CAFFEINE IS TOXIC IN HIGH DOSES. (SEE ... Step 1: Parts List.