Presents results of a science clubs' investigation of the micro-meteorology of a shopping center, particularly temperature and precipitation effects related to automobile air pollution. (AL)

Methods, based on historical techniques, are described which may be used to determine the relative density of irregularly shaped objects of various composition. (TS)

Describes how to measure the daily rhythm of activity (photoperiodism) of small mammals. Three methods for recording information are reviewed including instructions for making a recorder. Includes suggestions for activities and experiments. (PR)

The role of phosphates in environmental issues and in detergents is discussed. Experimental procedures are described for colorimetric determination of orthophosphates. (TS)

Describes and compares procedures and results of determination of colorimetric, potentiometric, and amperometric endpoints of an oxidative titration of arsenite by iodine. (TS)

Reviews the advantages of computer simulated environments for experiments, referring in particular to acid-base titrations. Includes pre-lab instructions and a sample computer printout of a student's use of an acid-base simulation. Ten references. (PR)

Discusses questioning techniques and problem solving approaches for a sixth grade elementary school physical science activity using dry ice. Sequential steps of analysis and synthesis and supportive science demonstrations necessary for closure on Why" type questions are emphasized. (JM)