Describes the experimental and theoretical details for constructing and calibrating an inexpensive, homemade liquid-lens refractometer. Measures refractive indices that are within the experimental errors discussed and close to the literature values. (JRH)

Describes systems used to introduce students to the concept of torque and discusses the effects that puzzle the beginner in the introductory lab. (JRH)

Describes a method to combine two learning experiences--optical physics and matrix mathematics--in a straightforward laboratory experiment that allows engineering/physics students to integrate a variety of learning insights and technical skills, including using lasers, studying refraction through thin lenses, applying concepts of matrix…

Presents a simple and reliable technique using commonly available equipment for monitoring carbon monoxide in automobile exhaust. The experiment utilizes a gas chromatograph and a thermal conductivity detector (TCD). (DDR)

Discusses the problem of seizing cocaine-tainted money. Describes an experiment designed to determine what percentage of paper currency is contaminated with cocaine. Considers sampling, the analysis method, contamination, levels of cocaine in money and criminal activity, and the reliability of results. (SAH)

Explains the concept of stretch reflexes to students using a mechanical model. The model provides a dynamic multisensory experience using movement, light, and sound. Describes the construction design. (SAH)

Provides laboratory exercises that demonstrate two genetic concepts: the difference between a genetic selection and a genetic screening experiment, and the relationship between phenotype and genotype. (SAH)

Uses alkaline phosphate to remove the phosphate group from phenolphthalein diphosphate. Discusses problems which include the interference of ambient light and temperature variation. Provides detailed information about the apparatus and the experimental procedure. (ASK)

Describes a paternity simulation experiment with two situations. Uses ABO blood group analysis and horizontal agarose electrophoresis to identify the biological fathers. (YDS)

Explains the limitations of a traditional density experiment and presents an inquiry-based laboratory experiment which allows students to develop an understanding on the relationship between the object's properties and the volume of water the object displaces. (YDS)

Introduces physics laboratory experiments offered to general public by the Stockholm Science Laboratory demonstrating collaboration between theory and experiment. (YDS)

Claims that the technology required to produce common products can serve as the basis for student research projects. Describes the process for the creation of rayon from cellulose as a joint teacher/student investigation. (CCM)

Examined 7- to 10-year-olds' ability to acquire a domain-general processing strategy--Control of Variables Strategy (CVS)-- and make valid inferences. Found that with explicit training within domains and probe questions, children could learn and transfer the CVS. Probes without direct instruction did not improve CVS and inferential thinking…