Describes a laboratory experiment on geometrical optics designed for life science majors in a noncalculus introductory physics course. The thin lens equation is used by the students to calculate the focal length of the lens necessary to correct a myopic condition in an optical bench simulation of a human eye. (Author/MLH)

Presents information on a centrifugal force apparatus, signal averaging with a minicomputer, and the use of an air track. (MLH)

Describes a study which compared the exam scores of students who worked in groups to those of students who worked as individuals in an undergraduate organic laboratory course. Results showed that the group approach produced significantly higher exam scores for low achievers. (MLH)

Describes an undergraduate organic laboratory experiment involving the separation of an unknown solid organic acid and an unknown solid organic base. The experiment is designed to present the student with an unexpected difficulty, namely, the formation of a separable viscous liquid, to see how the student handles this difficulty. (MLH)

Describes a series of experiments which illustrate the analytical capabilities of fluorescence, and outlines two straightforward analyses involving real analyses. These experiments are suitable for an undergraduate instrumental analysis course and require approximately six to seven hours of laboratory time. (MLH)

Describes an experiment that results in the construction of an ecological pyramid with three tropic levels. (GS)

Describes an experiment that generates data for calculating the ratio of molecular separation in a gas to molecular diameter. (GS)