A mixture of salt water and isopropyl alcohol is immiscible, forming two separate liquids with the organic layer on top and aqueous layer on bottom. When universal indicator is added to such a mixture, all of the indicator compounds in the universal indicator preferentially dissolve in the alcohol--except for phenolphthalein at high pH. Mixtures…

A lesson plan on the phylum Tardigrada is presented in a storytelling workbook that introduces the evolutionary concepts of adaptive radiation, speciation, divergence, and "tree-thinking" through narrative, transitional art, contemplative coloring, and data searches, which can be enhanced with microscopy wet labs. Students gain insight…

Reported is a study of classificational preference of 250 school children ranging in age from 3 to 8 years old. These subjects showed typical diversity in academic experiences and intellectual aptitudes. The research procedure involved presenting a subject with a set of colored paper shapes and asking him to sort the objects into subsets. The…