Discusses a laboratory exercise simulating the paths of light rays through spherical water drops by applying principles of ray optics and geometry. Describes four parts: determining the output angles, computer simulation, explorations, model testing, and solutions. Provides a computer program and some diagrams. (YP)

Described is the construction and use of an osmometer that is low in cost, easy to make, and durable. Materials needed and procedures are outlined. Diagrams show an assembled instrument and individual parts. (RT)

Described is an experiment for measuring the coefficient of restitution with a meter stick, balls of different types, and scraps of material for the plates. Provides the experimental procedure and an apparatus diagram. (YP)

Makes use of distinctions between experiment and demonstrations to resolve a paradox for the sociology of scientific knowledge. Describes two public tests which illustrate these themes. Discusses types of core-set distortion and suggests a partial solution. (YP)

Discusses and suggests some solutions for three problems related to chemistry laboratory management, including disappearance of teaching assistants, check in/out procedures, and slow students. (YP)

Explores a way of analyzing laboratory activities that can help middle and high school science teachers to match their instructional goals with one of three appropriate types of activities: confirmation, generalization, or resolution. Examples and guiding principles for each kind of activity are given. (Contains 23 references.) (MDH)

Discusses how laboratory skills or experiences learned in a chemistry course can be used to help students to better understand physics. (ZWH)

Presents a procedure that students can use to determine the center of mass of a thin (two-dimensional), homogenous object experimentally, analytically, and numerically. Requires students to use three distinctly different approaches to a single problem and necessitates a combination of laboratory skills, a knowledge of fundamental calculus, and…

Uses the Science Process Skills Inventory (SPSI) to analyze student efforts at writing experimental designs. Results indicate that explicit, incremental development of the science process skills of formulating hypotheses and identifying variables, together with model examples, may be a means to facilitate student success in designing science…

Discusses concerns regarding the assessment of scientific investigations in the National Curriculum. Presents observations and assessment advice and guidance. (JRH)

Presents experiments that use the Mattel's Hot Wheels Top Speed toy set to show that work is a measure of energy transferred to or from a system. (JRH)

This study developed an experimental analysis procedure based on the results of a descriptive assessment, involving five parents and their children with problem behaviors. The experimental analysis required only four sessions to demonstrate a function for each subject's problem behaviors. Interventions involving functional communication training…

Describes problems that are presented in the form of experiments. The philosophy, method of solution, and several examples of mechanics experiment problems are described. (LZ)

This paper extends discussion of Cushing's contribution to Bohm's deterministic interpretation of quantum mechanics, which raises the question of whether self-understanding is at issue in physical science as it is in social science. Addresses ideas by Bevilacqua and Giannetto about the use of historical texts and the primacy of experiment. (LZ)