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:
A simple idea of how much caffeine is contained in a 7 oz. cup of coffee based on brewing methods is that the highest caffeine content is found in drip coffee, which is 115-175 milligrams, depending on the bean.