Describes a demonstration to show the character and behavior of mixing clouds. Discusses laminar and turbulent flow, and the formation of contrails and other cloud phenomena. (CW)

Discusses two strategies that provide concrete-thinking students with opportunities to develop and use formal or critical-thinking skills. Describes using task analysis and long-term investigations in the classroom. (YP)

Discusses the use of direct demonstration of the connections among the science process skills and the content areas of science. (MKR)

Presents activities that enable students to determine the exact time of midday and to use this to plot a north-south line. Uses shadow experiments to teach the concepts of rotation of the earth and calculation of latitude. (JRH)

A major contributor to our understanding of the adaptation of all organisms to the physical environment is physiological ecology. Described here is an inexpensive, reliable and simple experiment to aid in helping students to understand better the acclimation process. (ZWH)

Provides an activity which measures the heat transfer through an insulated cylindrical tank, allowing the student to gain a better knowledge of both the physics involved and the working of spreadsheets. Provides both a spreadsheet solution and a maximum-minimum method of solution for the problem. (MVL)

Describes the Macintosh equipment and software necessary to obtain and use digitized video for motion analysis. Also provides a simple strategy for undertaking such an analysis. (MVL)

Liquid crystal displays are currently utilized to convey information via graphic displays. Presents experiments and explanations that employ the concept of liquid crystals to learn concepts related to the various states of matter, electric and magnetic forces, refraction of light, and optics. Discusses applications of liquid crystal technology.…

Describes a college course that provides a challenging learning experience in science based upon famous experiments and observations dating from the time of Aristotle to the present day. Presents information concerning (1) the course organization, structure, laboratory development, and expectations; (2) course content by quarter; (3) evaluation of…

Authors discuss how computer laboratory interfacing has revolutionized their nonscience-major introductory chemistry course. Discusses the advantages of doing away with the "cookbook" approach to laboratory experimentation. Presents an evaluation of the course approach including the finding that over 75 percent of the students felt that…

The purpose of this study was to determine the concerns of Texas science teachers about the 40 percent laboratory time rule just prior to enforcement and at the end of its first year of implementation. The methodology, results of the first and second years, conclusions, and implications for teaching science are discussed. (KR)

Presents research results on photosynthetic, carbon monoxide utilizing bacteria. Discusses applications of the research and offers three sets of experimental procedures and data that students analyze to determine which bacterium from a soil sample uses carbon monoxide fastest. (Contains 21 references.) (MDH)

Students explore three-dimensional properties by creating red and green wall decorations related to Christmas. Students examine why images seem to vibrate when red and green pieces are small and close together. Instructions to conduct the activity and construct 3-D glasses are given. (MDH)

Describes problems with teaching embryology in the traditional manner. Presents a new approach where students prepare presentations, questions, and discussion topics. During laboratory periods, students conducted their own long-term research projects. (PR)

Describes a project to improve the science curricula and the science teaching skills of instructors in Houston-area two-year colleges in such a way that the program can be replicated in other locations. Two-year college faculty members were teamed with faculty from universities. (PR)