06/03/2026
What if your students could send something to the bottom of Lake Superior, and get it back?
This spring, 9 classrooms did exactly that. Through IISG's Shrinking Cup program, students decorated Styrofoam cups, then sent them approximately 290 meters underwater. As water pressure increased with depth, the cups shrank, returning as miniature versions of the originals.
It's Boyle's Law in action: as pressure increases, volume decreases. But more than that, it's science students can hold in their hands, see with their own eyes, and actually remember.
Want to bring this to your classroom? Learn more about the program:
https://iiseagrant.org/education/curriculum-activities/shrinking-cup/
U.S. EPA Great Lakes Region