Outlines eight science experiments that require no materials except household trash. (SJL)

Article described an experiment in which students learned to investigate the sound of water particles falling over rocks as well as the change in composition of rocks as they travel along the riverbed. (RK)

The study and construction of sundials is a useful teaching aid at several levels of instruction, since it involves understanding the shape, divisions, and major motions of the earth. (Author/RLV)

Described are two hospital-based laboratory exercises which helped students perceive the relationship between the principles of microbiology and the practice of nursing. The exercises involved an environmental study focusing on problems of nosocomial infection and a study of patients hospitalized with infectious diseases. (Author/MS)

Three classic visual toys are discussed and instructions are given for their construction. These are moire patterns, kaleidoscope, and stereoscope. (MP)

Provides directions for basic science experiments which demonstrate the rain cycle, fundamentals of cloud formation, and testing for the presence of acidity in local rainwater. Describes materials required, step-by-step instructions, and discussion topics. (NEC)

Scientific method marks the learning in a student flight center. (Editor)

Details a laboratory experiment designed to extend the calcium PVC matrix membrane ion-selective electrode studies to complex formation equilibria. (Author/MA)

Presented is a laboratory exercise that utilizes the natural yeast carbonation method of making homemade root beer to study fermentation and the effect of variables upon the fermentation process. There are photographs, a sample data sheet, and procedural hints included. (Author/MA)

This experiment designed for beginning physics students, is related to postal regulations restricting the size of envelopes. A graph is constructed that allows for testing the mailability of envelopes. (MP)

Describes an experiment to characterize the enzyme polyphenol oxidase. Includes Purpose, Reagents and Equipment, Procedure, Extraction, Treatment of Data, and Discussion. (MA)

You can't see, smell or taste air - but here's an easy method for experimenting with it. (Editor)

The use of the earthworm as a laboratory animal for studying the effect of starvation on nitrogen metabolism is discussed. Simple techniques and methods are presented allowing in vivo physiological responses to be compared with changes in the enzyme potential of gut tissue. (Author/MA)

Outlined are simple activities for studying soil, which can be conducted in the schoolyard. Concepts include soil profiles, topsoil, soil sizes, making soil, erosion, slope, and water absorption. (SJL)

An activity is described that is designed to give students a chance to learn about speed by calculating their own running or walking speed and the speed of cars. (MP)