Students study the role of water in limestone cave formation and create a cave on karst-like grid on paper.

Learners separate food coloring using liquid chromatography. In this chemistry instructional activity, students explain the effects of different solvents on the rate of separation.

Seventh graders perform an experiment to determine the effect of temperature on reaction rates. In this chemistry activity, 7th graders take measurements and record data. They create a graph and analyze results.