Presents the results of an experiment designed to test two hypotheses: (1) a delay of two weeks at room temperature will have no effect on the viability of fertile chicken eggs and (2) refrigeration will have no effect on the viability of fertile chicken eggs. Experimenters were the author and two ninth-grade students. (PEB)

Simple laboratory investigations are given which expose elementary students to optical crystallography techniques. Procedures and materials are designed for sixth-grade students. (SA)

Provides basic information on the anatomy, physiology, behaviors, and distribution patterns of the box turtle. Offers suggestions for the turtle's care and maintenance in a classroom environment. (ML)

Simple activities are described which use paper clips and straws or a board to demonstrate the properties of the lever. (BB)

Presents an activity in which students gather their own snowflake collection in search of matching crystals. Students stretch plastic wrap over embroidery hoops that provide a snowflake-catching surface. Snowflakes are viewed under a microscope and photographed. (MDH)

Presents an activity that is part of the National Science and Technology Week (NSTW) 1993. Students apply principles of biomechanics to find the most effective techniques for performing a standing broad jump and use that analysis to improve their own jumping. Instructions include procedures, materials needed, and possible extensions to the…

Describes activities dealing with the surface tension of water designed to capture interest and raise questions in students. (BR)

Describes an experiment designed to introduce students to chromatographic techniques. Also describes a teacher demonstration in which leaves obtained during the spring and fall are analyzed using chromatography. Procedures for both the experiment and the demonstration are outlined. (JN)

Students conducted an experiment to study the plant growth of three Amaryllis plants. Students examined the speed and amount of growth, cross-pollinated the plants to produce seeds, and compared the growth of amaryllis seeds to the growth of onion seeds, a plant in the same family, Amaryllidaceae. (MDH)

Provides guidelines for simple acceleration experiments with string and attached weights as a means to stimulate the reticular activating system (RAS) of the human brain. Several methods (discrepant events, curiosity, choices, and doubt) are suggested for promoting RAS high-level thought. String drop experiments provide concrete experiences with…

A science and social studies unit developed around rosin is described. Students develop an understanding of the processing of raw material from a plant source into a commercial product and how to protect wood from weathering by preparing, testing, and evaluating varnish and shellac for their wood protective qualities. (Author/DS)

Explains a way to determine the age of a turtle, how to care for them and what to feed them while in temporary captivity. (GA)

Urges the use of the immediate environment of the school to serve as a focus and a medium to help plan activities and experiments in the different subject areas of science, and in the area of environment. (GA)

A five-week introductory unit on electricity, structured in a historical perspective provided by the letters of Ben Franklin, is described. (CP)

An experiment on the heat conductivity of different materials are described. Applications for energy education in the elementary classroom are implied. (MDR)