Describes an experiment producing a visible spectrum with inexpensive equipment available in the physics classroom. Discusses some related equations, apparatus settings, and instructional methods. (YP)

Asks whether the masses of a block of wood and a block of iron with the same weight are different. Discusses the buoyancy of air involved in the problem. (YP)

Presented are the results of a survey of biology teachers. Results are compared to surveys of Ohio and Kentucky. Suggestions to improve the coverage of evolution are included. A copy of the survey questionnaire is appended. (CW)

Discussed is the value of using essays and other popular writings as supplemental material for advanced placement biology courses. Their value as motivators and as views of the everyday work of scientists is stressed. (CW)

Presented is a simulation program for Apple II computer which assays the effects of a series of variables on bacterial growth and interactions between microbial populations. Results of evaluation of the program with students are summarized. (CW)

Discusses the important concepts involved in problem solving. Presents a chain representation of problem solving and gives an example of the application of this method. Provides a strategy for teaching controversial issues in a science classroom and gives an example of the implementation of the strategy. (CW)

This article describes how pasteurized milk can act as a growth medium for bacteria and provide an ecosystem for scientific inquiry. Included are objectives, materials, procedures, questions and a discussion of expected results. (CW)

Asks the relationship between mass and skidding distance. Provides a problem with illustrations and an answer. (YP)

Presents the LOGO computer language as a source to experience and investigate scientific laws. Discusses aspects and uses of LOGO. Lists two LOGO programs, one to simulate a gravitational field and the other projectile motion. (MVL)

Contends that the natural science curriculum does not prepare biology students for understanding the process of evolution. Proposes improved teaching approaches related to geological time, the natural transition of earth environments, the variability and alteration of genetic makeup, and the biological potential of species as being necessary for…

Presents a brief summary of the transformation of a single fertilized ovum into a multi-celled human. Discusses the similarities and differences of identical and non-identical twins. Cites twin pairs that do not neatly fit the monozygotic or dizygotic schemes of human development. (RT)

Provides historical background, descriptions, uses and basis for identification of diatoms. Explains collection, dry-mount cleaning, and preparation procedures of the algae. Cites additional resources. (RT)

Disguises a lesson about skulls with some fun to cause less fear among students. Outlines strategies, questions, and answers for use. Includes a skull mask which can be photocopied and distributed to students as a learning tool and a fun Halloween treat. Also shown is a picture of skull parts. (RT)

Describes the historic development of the periodic table from the four-element theory to the Lavoisier's table. Presents a table listing the old and new names of chemicals and the Lavoisier's table of elements. Lists two references. (YP)

Discusses the teaching of ecology and environmental education in urban environments by using field trips to city parks, airports, nuclear power plants, water treatment plants, sewage treatment plants, incinerators, foundries, and forests. (MKR)