Presents three simple water activities, for grades 4-6, to teach about molecular attraction as seen in surface tension and cohesion. (Author/SJL)

Describes an alternative technique for determining the molar volume of hydrogen from the metal-acid reaction in which the metal sample is encased in a specially prepared cage and a pipette filler is used to fill an inverted burette with water. Eliminates some difficulties encountered with the conventional technique. (JRH)

Investigates the effect of seven different scientific inquiry activities on visitors' understanding of the science underlying an interactive exhibit. Findings indicate that the interpretation activity was the most effective in facilitating visitors' understanding and the prediction activity was the least effective. Other findings are discussed and…

Provides background information on the tobacco mosaic virus, the first known virus. Contains historical information about the occurrence of the virus and the history of its isolation. (DDR)

Explains how to create a Science Club Advisors Program in which students are the Science Club Advisors (SCAs). The SCA model was designed to improve science test scores, allow students to guide their own learning, make learning fun, and to be cost effective. (DKM)

Presents a multidisciplinary unit on natural dyes designed to take advantage of the natural curiosity of middle school students. Discusses history of dyes, natural dyes, preparation of dyes, and the dyeing process. (JRH)

Examines the relationship between cognitive learning, field trips, and follow-up activities. The study included 111 fourth grade students in a pretest-posttest control group design. Results indicate that the related follow-up activity reinforced some of the concepts presented during the field trip. (JRH)

Discusses different types of symbiosis--mutualism, commensalism, and parasitism--and examples of each type including lichens, legumes, mistletoe, and epiphytes. Describes how teachers can use these examples in the study of symbiosis which allows teachers to focus on many basic concepts in evolution, cell biology, ecology, and other fields of…

Presents a number of simple exercises that demonstrate potato tuber characteristics and are designed for high school biology students and teachers. Exercises include Typing, Grading, Shape, Eye Characteristics, Defects, Specific Gravity, Dry Matter Content, Glucose Content, Baking, Frying/Chipping, and Taste Testing. (JRH)

Presents an inquiry analysis tool and adaptation principles to help teachers evaluate and adapt laboratory instructional materials to be more inquiry-oriented. Based on the National Research Council's (NRC) essential features of inquiry. (NB)

Presents activities to dispel student misconceptions about density, particularly as it applies to buoyancy. Finds that misconceptions fall under three categories: (1) size; (2) shape; and (3) material. (NB)

Introduces science activities on water resources and how much water is available for consumption. (YDS)

Presents a laboratory experiment demonstrating the binding of calcium/calmodulin to calmodulin kinase II, which is important in the metabolic and physiological activities of the cell. Uses SDS polyacrylamide gel electrophoresis (PAGE). (YDS)

Describes the total internal reflection process that occurs when the internal angle of incidence is equal to or greater than the critical angle. Presents a demonstration of the effect of frustrated total internal reflection (FTIR). (YDS)

Identifies points where beliefs are important when making decisions about how graphs are drawn. Describes a simple case of the reaction between 'bicarb soda' and orange or lemon juice and discusses how drawing a graph becomes a statement of belief. (KHR)