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:
When this process uses ethyl acetate derived from fruit or vegetables, the coffee is said to be naturally decaffeinated. Instead of steaming the coffee beans, the water method or the indirect method soaks the beans in water.The water is then drained and either ethyl acetate or methylene chloride is added.hen this process uses ethyl acetate derived from fruit or vegetables, the coffee is said to be naturally decaffeinated. Instead of steaming the coffee beans, the water method or the indirect method soaks the beans in water.