Describes a simple method for preserving snowflakes that allows them to be viewed and photographed through a microscope under different lighting and color-filtering systems to bring out details that would otherwise go unnoticed. Includes directions for preparing the preserving solution, replicating procedures, and the related safety precautions.…

Introduces the basics of radio astronomy and describes how to assemble several simple systems for receiving radio signals from the cosmos. Includes schematics, parts lists, working drawings, and contact information for radio astronomy suppliers. (11 references) (Author/JJK)

Reviews the discovery, the properties, and the composition of the physical phenomena of fields with a focus on magnetic and electrical fields and what makes them special. Provides a method to detect and estimate the strength of electromagnetic fields using an ordinary portable radio. (Author/JJK)

Describes the electrical and material characteristics of a wide variety of sensors and switches, as well as methods for connecting them to computers that are equipped with a joystick interface. Includes a BASIC computer program that facilitates automation of science experiments and storage of data gathered with simple transducers and sensors.…

Provides a basic introduction to fluorescence enabling the amateur scientist to easily, and safely, demonstrate and photograph this phenomenon with the aid of an ultraviolet lamp. Includes a list of necessary equipment and materials, as well as catalog availability from several hardware suppliers. (JJK)

Provides a step-by-step guide for a simple experiment to measure the approximate percentage of oxygen found in the air that we breathe. Includes background theory, working drawings, chemicals needed, list of supplies, experimental procedure, data evaluation method, and suggestions for extended study. (Author/JJK)

Describes a method for identifying and examining single ice crystals by photographing a thin sheet of ice placed between two inexpensive polarizing filters. Suggests various natural and prepared sources for ice that promote students' insight into crystal structures, and yield colorful optical displays. Includes directions, precautions, and sample…

Presents an insider's view of the judging process at science fairs from a former student participant who has performed as a judge at many science fairs. Discusses who the judges are, on what judges tend to focus, parental involvement, gifted students and outside help, the interview process, and the formal rules of judging. (JJK)

Investigates the use of temperature and light to change the usual intervals for plant germinating, sprouting, and flowering. Provides simple experimental procedures and discussions regarding photoperiodism, forced branching before spring, and various types of seed dormancy, including physical dormancy, physiological dormancy, and double dormancy.…