Describes the development of a program to establish in-school salvage systems for school-generated and nonschool-generated waste materials. Students from conservation classes became involved in collecting waste from "recycle" boxes in every classroom, in field trips, newspaper drives, and salvage of aluminum cans. (CS)

Describes a variation of "the suffocating candle" activity used to develop the process of predicting based on reliable data. Instead of using jars of varying sizes under which the burning time of candles is measured, the same jar is used while the candle is elevated on varying numbers of blocks. (CS)

Introduces three demonstrations using rubber balloons: rate of reaction, air pressure, and solubility of gases in liquids. Provides the materials, procedure, questions, further investigation, and discussion in each demonstration. (YP)

This article describes the basic physics of several types of holograms and discusses different recording materials in use. Current and possible future applications of holograms are described as well as their large-scale production. (Author)

Discussed are changes made in the physics curriculum of the Danish Gymnasium. Presents a table showing the curriculum for science and language tracks. Describes five dimensions of physics and intermediate and high level courses. (YP)

Presented is an activity designed to connect Mendelian laws with the physical processes of cell division. Included are materials production, procedures and worksheets for the meiosis-mitosis game and a genetics game. (CW)

Ordering principles, hierarchy, taxonomy, emergence, and decomposable systems are discussed. Examples of hierarchies are included. (CW)

Outlines a laboratory activity which takes place at the zoo and helps make some of the important aspects of evolution more concrete. Includes the principles of adaptation, variation within a species, types of evolution, and predicting future evolutionary trends. Provides a student worksheet. (RT)

Describes a situation in which a ball strikes a stationary ball. Reviews theoretical findings of such collisions and two important related factors which are momentum and kinetic energy. Includes diagrams for showing the use of a pendulum apparatus, the collision of different size balls, and chain collisions. (RT)

Describes how Tinkertoy parts can be use to aid in helping students understand the application of Gauss' Law. (ZWH)

Young aspirant scientists and technologists (n=82) and nonspecialist mainstream classroom counterparts (n=391) completed a 26-item questionnaire to ascertain their perceptions of the nature and methodology of science. Significant differences were found on six items. (Author/MKR)

Describes briefly the development of ancient as well as current theories and ideas on biological evolution. (ZWH)

Presents demonstrations of stereo sound interference resulting from two receivers being placed at different sound path distances from two speakers. It serves as a model for listening to two speakers with our ears. (PR)