A key part of the practice of chemistry is the analysis of chemical composition, including through gravimetric analysis and spectrophotometry. However, the complexity of doing multiple calculations to obtain analytical evidence, such as that required to determine an empirical formula, presents a challenge if such analytical methods are to be…

This dissertation describes the results of an investigation into introductory student understanding of special relativity in the context of the relativity of simultaneity. The research probes the extent to which students are able to use concepts from both Galilean and special relativity to determine, for multiple reference frames, the time…

Describes a study designed to compare the gradual development of children's understanding of shadows with Piaget's stages, categorize pupil responses in the shadow tasks, identify typical pupil responses in each category, and enumerate curriculum implications from the investigation. (GS)