The first part of a two-part article describes an experimental approach that can be used in teaching the concept of saturated vapour pressure. This leads to a discussion of refrigeration cycles in the second part of the article. (JR)

Describes an elementary school science activity in which students conduct experiments to verify their hypotheses relating to the effect of salt and other chemicals on the melting point on ice. (JR)

Describes an experiment, conducted by sixth-grade students, with mice that demonstrates the importance of a balanced diet. (JR)

Includes seven topics relating to laboratory activities, procedures and materials suitable for use in general science classes at the secondary and upper elementary level. (JR)

Condensed version of a speech presented to the German Society for Applied Linguistics in October 1970, Stuttgart, Germany. (WB)

Suggests that ideal experiments fit into course time constraints and be meaningful, relevant to course content, safe, inexpensive, simple, reproducible, and easy to set up/maintain. Describes a Boyle's Law experiment that uses a minimum of equipment and meets the foregoing criteria. Apparatus used, procedures, and safety precautions are…

The purpose of constructing labels is to communicate those scientific facts related to hazards and to select and describe the reasonable precautions that should be taken to prevent otherwise unforseeable harm. Recent developments in the use of combined numeric and pictorial symbols in chemical label construction are described. (JN)

The threat of instrument obsolescence and tight federal budgets have conspired to threaten the existence of research analytical laboratories. Despite these and other handicaps most existing laboratories expect to keep operating in support of basic research, though there may be serious penalties in the future unless funds are forthcoming. (Author)

Pinpoints common areas of neglect in considering science safety. Familiar hazards are discussed, with special consideration of improper chemical storage, old and unlabeled chemicals, and faulty circuits and equipment. An appendix lists basic safety rules and presents a checklist for general laboratory safety. (CS)