Describes electricity experiments which can be used for such purposes as determining the magnetic field of a magnet, making an electromagnet, and showing the repulsion of like poles of a magnet. Includes list of materials needed, procedures used, and instructional strategies. (JN)

Highlights difficulties that occur when teachers attempt to devise new experiments (use of hydrogen peroxide decomposition) and how seemingly useless results can be turned into productive student projects. Considers effects of ions present in tap water, pH, dust, and nature of vessel's surface. Reaction order and safety precautions are noted. (JN)

Describes the physics of an experiment in which an air wedge is formed between two glass plates inclined at a small angle by means of a thin spacer. Implications for instruction are noted. (JN)

Describes a precipitation experiment which follows a yellow powder experiment discussed in part 1 (vol 62 no 3 p238-40). Advantages of using a Petri dish to perform the experiment, laboratory procedures used, instructional strategies, and implications for chemistry curriculum and instruction are discussed. (JN)

Six secondary school teachers describe their most successful earth science investigations. They include various outdoor field activities, road-map reading skills, student-prepared and conducted investigations, and use of several materials for studying volcanoes. (JN)

Shows how the use of pulleys can add a new direction to experiments that demonstrate forces. Procedures used and typical student results are included. (JN)

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)

This document contains the listings for 46 computer programs which are designed to teach various concepts in chemistry and physics. Significant time was spent in writing programs in which students would input chemical and physical data from their laboratory experiments. No significant time was spent writing drill and practice programs other than…

Describes an apparatus for an experiment on winding motion in three dimensions. Discusses theory and provides a calculation example. (JM)

Uses the subject of enzymes to illustrate the topical approach to teaching biochemistry at the secondary level. Includes the procedures for three experiments dealing with various aspects of enzymes. (JN)

Describes how to make an electroscope from aluminum soft drink or beer cans. Also describes several electrostatic experiments using the easily constructed apparatus. (JN)

Background information and procedures are provided for an experiment in which an oxidation reaction is used to distinguish saturated from unsaturated fats. Results of the experiment lead to discussions and investigations of such areas as digestion chemistry, enzymes, hydrogenation, and the relationship between heart disease and fat consumption.…

Describes laboratory activities using algae as the organisms of choice. These include examination of typical algal cells, demonstration of alternation of generations, sexual reproduction in Oedogonium, demonstration of phototaxis, effect of nitrate concentration on Ankistrodesmus, and study of competition between two algae in the same environment.…

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)