Poly Density Bottle
When the 1L bottle is shaken, blue and white beads mix as expected. However, when allowed to settle, the beads separate, white at the top and blue at the bottom. Then, the two separated colored beads slowly come together in the center of the liquid. How often do you see something floating in the middle of the liquid? Great for illustrating so many concepts: solubility, density, miscibility, the salting out effect... Spontaneous order from disorder! Isn't this a violation of The Second Law?? (Rubbing alcohol not included.)
Type(s): Demonstration
Subject(s): General Science, Chemistry, Biology
Grade Level(s): Informal, General Public, Post-Secondary, High School, Middle School
Total Quantity: 2