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.…

Presents a nontechnical introduction to the field of statistics. Includes discussions on descriptive statistics, random variables, mean, standard deviation, standardized scores, and inferential statistics. Describes six statistical software packages available for IBM personal computers and compatibles. (KR)

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…

Describes six simple experiments that can enable students to better understand gravity and the role it plays in the universe. Includes discussions of Newton's experiments, weight and mass, center of gravity, center of mass, and the velocity of falling objects. (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.…

Discusses some of the remarkable capabilities and fascinating behavior of plants. Describes several simple experiments that young scientists can accomplish with plants to demonstrate their ability to sense, react, and adapt to their environment. (JJK)