Describes a laboratory explosion involving 30 percent hydrogen peroxide being heated on a ceramic-top hotplate. Gives three safety suggestions: peroxides should be treated as potential explosion hazards; alternatives to the ceramic-top hotplate for these reactions should be considered; and lab workers should be prepared for the worst possible…

Discussed are technological advances applying computer techniques for image acquisition and processing, including digital radiography, computed tomography, and nuclear magnetic resonance imaging. Several diagrams and pictures showing the use of each technique are presented. (YP)

As North America increasingly becomes an urban society, questions surface as to the role and direction of environmental education programs. Such programs may hold potential in abating some of the problems inherent with contemporary inner city youth. Several successful on-going programs are reviewed. (Author/CW)

A student laboratory exercise on the development of nutrient deficiency and toxicity symptoms was linked to analytical techniques and ion chemistry by having the students determine which ions in the nutrient solutions were missing or present in excess. (Contains 15 references.) (Author/MDH)

Two studies with students in grades 7 to 10, explored whether adolescents can and will construct abstract visualizations to structure complex information. Experiment 1 showed students can construct novel information with visualizations. Experiment 2 showed that students will analogically transfer specific visualizations and will transfer the…

Describes acid-base titration experiments using the computer. (MKR)

Describes the history and the development of the field of superconductivity. Identifies the significant interaction of electrons to form Cooper pairs. Presents background theory, describes approaches, and discusses problems encountered in the search for better high temperature superconducting materials. Provides technological applications of…

Discussed are balloons and electroscopes, understanding cosmic rays, cosmic ray paths, isotopes and cosmic-ray travel, sources of cosmic rays, and accelerating cosmic rays. Some of the history of the discovery and study of cosmic rays is presented. (CW)

The perspective of biotechnology and its development in the K-12 technology education curriculum are described. The content curriculum development and implications for activities are discussed. The difference between a curriculum focused on the activities of industry compared to one that addresses technology as it pervades all human endeavors is…

An interdisciplinary robotics project undertaken by students is described. The students acted as designers, innovators, and the engineers in designing a dancing robot. The origin of the problem, designing of the mechanical frame, pneumatics, digitized sound, and problems with the design are discussed. (KR)

Identifies the unsophisticated assumptions and conjectures, both intuitive and empirical in character, underlying secondary school science students' (n=25) portrayal of scientific knowledge and its production. Structured interview protocols explored not only the students' substantive knowledge base but, perhaps more important, their ability to…

Describes secondary science programs designed to meet the educational, behavioral, social, and emotional needs of students who do not appear able to benefit from, or adapt to, the traditional educational system. Includes an outline of lessons encompassing a multidisciplinary, computer integration plan for hatching chicken eggs, and directions for…

The importance of integrating the science curriculum from elementary through secondary classrooms is discussed. An example using the topic of the sea is used to explain the difference between true integration and correlation in both elementary and secondary levels. The importance of choosing learning activities that support objectives stated in…

Activities from the book "Connecting with Nature" are presented. Topics include experiences, connecting, the affinity-sensation network, and microorganisms. Students are led through activities and are asked to sense, enjoy, validate, match, resonate, appreciate and honor, trust, and celebrate a particular nature area. (KR)

The results of a National Research Council report on the status of biology education in the United States are discussed. Poorly trained and supported teachers, a curriculum that seems designed to snuff out interest, inappropriately used standardized tests, and textbooks that are often inaccurate and misleading were found. Recommendations are…