In Mrs. Frizzle’s science classroom, she sets up a beaker as in the illustration shown; there is a bag filled with a glucose solution (glucose and water) in a beaker. The beaker also has a glucose solution, but at a different concentration. The bag is permeable to water but not glucose.



One student, Ricky, is working on the problem and draws his arrow showing the movement of water into the bag.



Another student, Cindy, disagrees with him. Cindy says the arrow should be showing the movement of water out of the bag.



Which of the two students is correct?