Describes an elementary school science activity in which students conduct experiments to verify their hypotheses relating to the effect of salt and other chemicals on the melting point on ice. (JR)

Describes an experiment, conducted by sixth-grade students, with mice that demonstrates the importance of a balanced diet. (JR)

Describes the use of a time-sharing computer and an x-y plotter in a variation of the laboratory exercise on the physical pendulum. (HM)

Describes a 9-hour organic chemistry experiment that involves the isolation of (+)-limonene from orange peels and conversion of this product into (-)-carvone. (CS)

Describes an advanced undergraduate laboratory experiment designed to give the senior chemistry student an opportunity to apply several synthetic and purification techniques as well as possibilities for the application of NMR spectroscopy. (CS)

When examining complex waveforms by examining oscillograms from simple resonant circuits, interpretation problems occur. These problematic oscillograms are explainable by recognizing that the typical resonant filters pass significant amounts of several harmonics adjacent to the one intended. Adjacent harmonics effects are computed; resulting…

Describes a science laboratory experiment that can be done at home with the assistance of parents or older siblings. It is offered as an alternative to reading assignments or answering questions for homework. Parental assistance is encouraged. (SA)

Presents background information, procedure, and results of an experiment, using easily obtainable chemicals and equipment, illustrating chemical kinetics. The experiment may be done in a letter as one four-hour physical chemistry laboratory period. (JN)

Describes an exercise using dandelion floral stems to demonstrate the movement of water through cellular membranes. (CS)

Presents a chemical instrumentation laboratory experiment that introduces the methodology of the fabrication and evaluation of an ion-selective electrode. (CS)

Presents methods by which undergraduate students gain practice in ESR spectroscopy. (CS)

This experiment demonstrates the polarization properties of the transition moment, vibronic activity in an excited state, cyrogenic techniques, crystal site splitting, and the use of mixed crystals. (BB)