The Poly Density Bottle!

Poly Density Bottle (Please excuse the "Image 6")

When I first saw the Poly density bottle, I did not notice anything unusual. Under further observation, I then realize that the beads are floating in the middle, and not going to the top. I then realized that each component of the bottle must be different densities. The fluid at the bottom is the most dense, and the liquid at the top is the least dense. That means that the beads in the middle must have a density between the two liquids. Here is a density chart that I just made up rn:

Least Dense-----Most Dense

Isopropyl Alcohol<White Beads<Blue Beads<Salt Water

For further reading:

http://www.phys.utk.edu/demoroom/FLUIDS/POLYDENSITY.htm