Chemicals entering the atmosphere come from a number of sources but, in broad terms, are either from human activity or from the biosphere (natural systems). What happens to these chemicals once in the atmosphere is very important, of course. If they are toxic they can impact on the health of humans, animals and natural ecosystems. Therefore, it is…

The purpose of this study was to examine the validity of the Smarthealth watch (Salutron, Inc., Fremont, California, USA), a heart rate monitor that includes a wristwatch without an accompanying chest strap. Twenty-five individuals participated in 3-min periods of standing, 2.0 mph walking, 3.5 mph walking, 4.5 mph jogging, and 6.0 mph running.…

This study examines first graders' epistemic reasoning, in tacit "practical epistemologies" reflected in thinking about an investigation of their own design. I analyzed children's epistemic reasoning, following a design experiment scaffolding increasing regulation of scientific inquiry in a domain they studied in depth. Participants…

This article describes a research study in which a biologist and his research on Antarctic seabirds became part of an integrated science course for prospective elementary teachers. Students used the scientist's database on seabird chick growth rates for an experimental design investigation while the "regular" classes had a single science…

Forensic entomologists utilize insects (particularly flies) to establish the time interval between death and body discovery. This important piece of information may answer questions as to the circumstances of the individual's death and insects are now routinely utilized and recognized as being important forensic indicators. Of extreme importance…

This project was initiated in order to evaluate two literacy and science integrated instruction units, "Shoreline Science" and "Terrarium Investigations," designed by the Lawrence Hall of Science "Seeds of Science/Roots of Reading" Project ("Seeds/Roots"). We examined how the integrated units affect student…