Describes the nature, history, and applications of Doppler radar detecting the speed of moving object. Gives an example of measuring the radial velocity of a scattered wave. (YP)

Presents an assignment that involves forming student companies to determine and defend cost estimates for producing a silver Oscar statuette. Includes an assessment rubric for cooperative effort. (JRH)

Presents a unit on volcanoes for third- and fourth-grade students. Includes demonstrations; video presentations; building a volcano model; and inviting a scientist, preferably a vulcanologist, to share his or her expertise with students. (JRH)

Explores the theory behind the correlation between warm rain, rapid snowmelt, and the subsequent runoff using the concepts of enthalpy, thermal transfer, and energy transfer. Concludes that rapid runoff is not a consequence of rain per se but of the high humidities associated with the rain. (JRH)

Discusses the theory behind a study of motion where a hollow plastic sphere racing against a steel sphere in two parallel sections of inclined channeling always reaches the bottom first; once on the floor, however, the steel sphere travels faster, speeding past the plastic sphere when both are about one meter from the base of the track. (JRH)

Discusses the theory behind the changes in the times of sunrise and sunset and the sun's apparent gradual week-to-week motion. (JRH)

Reviews the development of the climax concept of succession, illustrates the misconceptions in current textbooks, and provides a conceptual model for an updated view of succession useful in teaching at the introductory level. Contains 38 references. (JRH)

Discusses the Kettering ignition system used on all vehicles for about a half century and transistorized automotive ignition systems. (JRH)

Contains a summary of the latest research findings related to the topics of eye development, mimicry, evolution of llamas, hybridization between Arctic wolves and huskies, ultraviolet light and algae, acid rock, orchids and funerals, enzymes that can withstand heat, fungus-killing compounds, chaos theory and the treatment of epileptics, sleep and…

Provides an overview of the "lux" system of bioluminescence. Supplements a laboratory exercise on bacterial transformation utilizing the "lux" system. (LZ)

The results of four studies involving three to seven year olds revealed that, by age three, some children (1) appreciated conservation of matter despite visual disappearance and the existence of invisible particles; and (2) made use of the particle concept to explain how a particle can continue to exist and maintain its properties despite visual…

Compares the notion of the conservation or inconservation of information with the laws of conservation of matter and energy. The theory of entropy in physics and its significance in information theory is discussed, and the essential nature of information is considered. (LRW)

Describes a learning activity in which students build a pneumatic arm wrestling machine, thus combining their interest in arm wrestling while making direct applications to many scientific and mathematical concepts. (JOW)

Illustrates how concepts about the motion and expansion of gases can be taught to elementary school students through experiments based on the opening a bottle of soda. (BB)

Concept mapping used in a science unit of a baccalaureate nursing program helped students become independent learners and gain confidence in science knowledge; instructor time was freed to work with students with learning difficulties. Issues included balancing science content with mapping techniques and effectively assessing learning. (SK)