Presents butterflies as an introduction to natural history. Describes observation tips and metamorphosis of butterflies in the classroom. Includes butterfly resources for naturalists and educators. (AIM)

Describes the manufacturing of ethanol, the effects of ethanol on the body, the composition of alcoholic drinks, and some properties of ethanol. Presents some classroom experiments using ethanol. (JRH)

Describes a grandmother's experience in working on a rainbow experiment with her granddaughter. Gives suggestions on how teachers can help students in discovering science and share experiences with them. Introduces two rainbow experiments and gives details on how to carry out these experiments. (MOK)

Presents activities that involve geological sleuthing to solve mysteries. Uses sand for teaching the scientific method, involving parents and community members, and helping students see connections between science and other disciplines. (JRH)

Discusses the properties and classification of liquid crystals. Presents a simple experiment that illustrates the structure of liquid crystals and the differences between the various phases liquid crystals can assume. (JRH)

Presents a method to teach the concept of beats as a generalized phenomenon rather than teaching it only in the context of sound. Involves using a video camera to film a computer terminal, 16-mm projector, or TV monitor. (JRH)

Presents a lecture and play in which the students themselves become the elements of the immune system. Aims at facilitating student comprehension and retention of the complicated processes associated with the immune system. Includes objectives, outline, background information sources, instructor guide, student narrator guide, extension, and topics…

Discusses the use of rocks and fossils to stimulate study of nuclear decay. (Author/JRH)

Describes activities on two storage organs, carrots and radishes, which are plants that store some of the food their leaves make in modified roots, stems, and even leaves. (ASK)

Introduces two activities for science projects on convection currents. (YDS)

Introduces Wilson A. Bentley, who studied precipitation. Discusses Bentley's method for measuring the number, size, and shape of raindrops and determining the rate of rainfall. Lists required materials and explains the procedure for students and teachers. Provides scientific background on condensation and precipitation. (YDS)

Explains the concept of spontaneous assembly which plays a role in determining the form of biochemical structures. (Contains 15 references.) (YDS)

Presents the activity of Cartesian divers which demonstrates the relationship between pressure, temperature, volume, and buoyancy. Includes both instructor information and student activity sheet. (YDS)

Presents a science activity in which students investigate a guinea pig's favorite food. (YDS)

Describes an activity for determination of genotype from phenotype using a logic puzzle. The puzzle provides an opportunity to consolidate understanding of the dominant and recessive alleles, genotype and its expression in phenotype. (Author/MM)