The lack of an adequate conceptual foundation in mathematics appears to have hindered the scientific discovery process. The author cites several examples from the history of science and mathematics. Implications for inquiry teaching -- both science and mathematics teachers must cooperate in helping students acquire the appropriate mathematical…

Discusses principles and definitions related to the thermodynamics of dilute solutions. Topics considered include dilute solution, Gibbs-Duhem equation, reference systems (pure gases and gaseous mixtures, liquid mixtures, dilute solutions), real dilute solutions (focusing on solute and solvent), terminology, standard states, and reference systems.…

Summarizes steps involved in a systematic method for balancing redox equations by inspection. (CS)

Argues that the logical, linear, rational conception of the universe dating from the seventeenth century has produced our present school system. Indicates that the current description of the universe coming from physicists speaks of wonder, mystery, and reverence and that this paradigm needs to become part of the schools' view of the nature of…

A diffusional driving force, called the radial force, which is responsible for the increase with time of the scalar separation between a fixed point and a particle undergoing three-dimensional Brownian motion, is derived using Boltzmann's equation. (Author/HM)

Investigated outcomes of the use of the learning cycle, which divides instruction into the Piagetian phases of exploration, invention, and discovery in general college chemistry laboratory experiments. Differences between concrete and formal operational students were explored in students' ability to master chemistry material varying in cognitive…

Discusses the concept of equilibrium in chemical systems, particularly in relation to predicting the position of equilibrium, predicting spontaneity of a reaction, quantitative applications of the equilibrium constant, heterogeneous equilibrium, determination of the solubility product constant, common-ion effect, and dissolution of precipitates.…

Maxwell's equation are solved for an inhomogeneous medium which has a coordinate-dependent dielectric function. The problem and its solutions are given in a format which should make it useful as an intermediate or advanced level problem in an electrodynamics course. (Author/SK)

Demonstrates that the second law of thermodynamics imposes a fundamental constraint upon the process of composition; examines the consequences of this constraint for writers and teachers of writing. (DD)

Describes how the home toilet tank can be used as either a classroom problem or experiment that provides a simple introduction to process control. (HM)

Challenges the contention of science that scientific language eliminates figurative language and, instead, demonstrates the relationship of metaphor, models, and analogy to scientific concepts. (AM)

Reports on an exploratory study of how people see and explain a prominent exhibit (Tornado) at an interactive science museum (the Exploratorium). Data was assembled using a novel, technically mediated activity system (Video Traces). Argues that Video Traces is an effective tool and discusses an expanded Video Traces system. (Author/DKM)

Explains the myth and the reality surrounding the source of the cloud produced from the reaction of dry ice with water. (DKM)

Presents activities in which students play the role of cadets performing missions for the fictitious SETI (Search for Extraterrestrial Intelligence) Academy. Guides students toward an understanding of evolutionary forces and how they are affected by the physical environment. (JRH)

Describes a project that enables students to apply their chemical knowledge and business sense in a real-world activity. Involves forming companies that compete against each other to produce two pounds of the best quality soap. (JRH)