This quasi-experimental study investigates how the classroom learning environment changed after inquiry-based activities were introduced and student questioning was encouraged. Three science teachers and three classes of fifth graders (n = 92) participated in this study. The analysis of covariance reveals that although the experimental group…

In order to facilitate senior primary school students in Hong Kong to engage in learning by observation of the phenomena related to electrical circuits, a design of a specific courseware system, of which the interactive human-machine interface was created with the use of an open-source software called the LabVNC, for conducting online…

This paper describes a multifaceted agitation and mixing experiment. The relatively inexpensive apparatus includes a variable-speed stirrer motor, two polycarbonate tanks, and an instrumented torque table. Students measure torque as a function of stirrer speed, and use conductive tracer data to estimate two parameters of a flow model. The effect…

A set of general principles underlying theory formation, theory revision, and experimentation are described. The manner in which these techniques may be integrated to provide a unified and comprehensive treatment of scientific theory development is demonstrated. In particular, the means by which experimentation is used to empirically guide and…

Describes the procedure to test the hypothesis that subjects' brain waves in response to a television flicker (distraction) would be smaller in amplitude during television programs of high, in contrast to low, interest. Results from 12 viewers support the hypothesis. (CP)

Summarizes findings of the deep sea drilling project at Scripps Institute of Oceanology. Results of Atlantic and Pacific Ocean drillings in terms of the composition and properties of the sea floor are discussed. (CP)

An article about musk oxen is used to introduce the role of clothing in keeping warm. Experiments for primary and advanced classes are included. (MT)

Presented is a annotated bibliography of science projects from the elementary through the professional level. (SJ)

Presents a laboratory exercise on photosynthesis suitable for high school biology. Allows students to perform the experiments with easily obtainable materials and within a lengthened period. Includes photosynthesis lab prep notes for teachers. (JRH)

Describes an electrode, selective for the salicylate ion, that can be prepared and used by undergraduate students. Discusses the preparation of the electrode, typical response characteristics obtained, and results of a limited study using the electrode to estimate the selectivity coefficient for an interfering ion and to determine the amount of…

Presents an experimental approach to illustrate that the thermodynamic properties of a system can be considered as the average of mechanical variables. Discusses the Knudsen effusion method to count the number of molecules, vapor pressure, the piezoelectric effect, the experimental setup, and sample experimental results. (JRH)

Provides an alternative method to test for vitamin C. Uses starch-iodine in place of DCPIP as the reagent in this experiment. (YDS)