Describes a bioassay laboratory exercise designed to introduce students to both acute and chronic bioassay procedures. Reinforces ecological principles and provides opportunities for students to use knowledge learned in the classroom in a realistic and ecologically-relevant situation. Contains 11 references. (JRH)

Determines that the philosophical basis for science education is likely to be an interesting field in the 21st century and that there is a need to provide the practicing teacher with some ideas for daily work such as local, national, and international student cooperation; using student lab reports to develop local scientific journals; and having…

Explores the dominant factor controlling the distribution of Daphnia. Describes components of a temperature gradient apparatus that can be assembled from materials readily obtainable in the laboratory and hardware stores. Investigates whether the mean depth of Daphnia is determined by temperature. (KHR)

Describes an automatic pipette washer that is functional, inexpensive, and easy to construct from locally available parts. (KHR)

This article describes the basic physics of several types of holograms and discusses different recording materials in use. Current and possible future applications of holograms are described as well as their large-scale production. (Author)

Although all students need more and better science classes to face the next century's challenges, students gifted in science also need access to dedicated teachers willing to assist their learning progress and encourage their production of original research projects. Integrating the science curriculum would also benefit gifted and other students.…

Discusses the nature, resolution, focal length, and angle of a pinhole camera. Describes the development and some applications of the camera. Nineteen references are listed. (YP)

Described are the history, formation, and observing techniques of meteors and comets. Provided are several pictures, diagrams, meteor organizations and publications, and meteor shower observation tables. (YP)

Presents a science experiment to demonstrate the emergence of a snake from an "egg" and illustrates the necessity of heat to induce the hatching process. (MKR)

Describes experiments designed to investigate the cooling rate of microwave-boiled water as compared to that of stove-boiled water. Concludes that within experimental limits, microwave-boiled water and stove-boiled water cool at the same rate. (JRH)

Explores strategies in the situation of a runner trying to evade a tackler on a football field. Enables the student to test intuitive strategies in a familiar situation using simple graphical and numerical methods or direct experimentation. (JRH)

Shows that the conventional wisdom about the extreme inaccuracy of stopwatch measurements during the acceleration and free fall of objects is mistaken. (ZWH)