Presents an activity involving reaction time developed for the Science of Sports, a traveling exhibition put together by Ohio's Center of Science and Industry. (JRH)

Presents activities and exercises on the production and direction of currents in fluids. (JRH)

Presents an activity in which students make their own cartoons and discover how to create the illusion of motion. (NB)

Describes an activity to study radioactive decay using charged balloons. Reports on readings of radioactivity taken at different locations in Edmonton, Alberta using balloons. (JRH)

Describes factors affecting sand composition and distribution along coastlines. Uses variations in sand types along the Oregon coast to illustrate the influences of sand grain density, wave action, and headlands on sand movements. Describes the seasonal movement of sand across beaches. (DLH)

Presents a set of six activities in population genetics for a college-level biology course that helps students understand the Hardy-Weinberg principle. Activities focus on characterizing a population, Hardy-Weinberg proportions, genetic drift, mutation and selection, population size and divergence, and secondary contact. The only materials…

A hands-on science activity, which calls for students to perform a physical checkup on a local tree, is described. A reproducible worksheet, "A Tree's Annual Checkup," is included. (IAH)

Argues that the concept of optical activity is vague to students because it is difficult for instructors to demonstrate the phenomenon in the classroom. Presents a demonstration that allows students to observe and manipulate the optical path of polarized light through optically inactive and active solutions. (CCM)

Describes a series of activities that help students form accurate conceptions of meiosis and how its process and purpose differ greatly from mitosis. Discusses the concept of crossing over. Uses a small plastic egg to engage students in a fertilization activity. (SAH)

Describes a board game, ImmunoScenarios, which was developed to reinforce the ideas about the immune system discussed in lecture classes. Emphasizes important characteristics of the body's specific defense system including specificity, cooperation among various cells, and memory. Includes directions for playing, student handouts, and scenarios.…

Explains the basics of soil color and the Munsell Soil Color Chart. Presents a chart showing the relationship between minerals and soil color. Introduces a soil color activity. (YDS)