Provides an alternative method to test for vitamin C. Uses starch-iodine in place of DCPIP as the reagent in this experiment. (YDS)

Presents an alternative approach to teaching Mendelian genetics that includes the use of mathematical procedures and models to describe the occurrence and probabilities of heritable outcomes. Examples illustrate use of the method to calculate genotypic and phenotypic ratios for crosses involving multiple alleles with independent and dependent…

Demonstrates how changes in air pressure cause air to move from one area to another causing wind. Includes an activity. (YDS)

Presents an activity on natural selection and how the peppered moth's adaptive values for their colors changed during the Industrial Revolution in Manchester, England, influencing their survival and ultimately affecting the survival of their offspring. Includes activity objectives. (Author/KHR)

A discussion of TV weather forecasting introduces this article which features several hands-on science activities involving observing, researching, and experimenting with the weather. A reproducible worksheet on the reliability of weather forecasts is included. (IAH)

Describes an activity that involves student teams designing and producing three-to-five-minute instructional videos that define a scientific concept and illustrate its application to their personal experiences. (JRH)

Describes a science experiment in which students place a balloon into an empty plastic soda bottle, some of which have holes in the bottom, pull the open end over the rim and attempt to inflate it. Only students whose bottles have holes in the bottom will be able to inflate the balloon, because of the air in the bottle. (MDM)

Describes the use of fingerprinting to interest students in the practical applications of science. Teachers can have students fingerprint each other, compare prints, and learn how they are used to solve crimes and find missing children. (MDM)

Describes several projects that allow students to explore what happens to gases, liquids, and solids as they are heated or cooled. The projects were specifically designed to counter the popular misconception, based on observations that water in the liquid state expands when it is cooled, that all matter in all states expands when cooled. (MDM)

Describes diabetes mellitus and its effects on human metabolism. Presents a procedure for a lab experiment on the endocrine system of rats. (YDS)

Combines the Native American medicine wheel with an elementary grade activity to teach different natural cycles. Lists necessary materials and Native American and natural cycle books for children. (Contains 13 references.) (YDS)

Summarizes the history of wild horses in North America and explains the social structure of horses. Discusses issues related to wildlife management. Presents activities for classroom use and includes a list of references and resources. (YDS)

Challenges students to produce miniature submarines that sink in water and then rise again as a gas is produced. Enhances students' understanding of density and buoyancy. (SAH)

Introduces the six-week-long, inquiry-oriented Planimal House project. Aims to teach the secrets of nature with in-depth research on living organisms. (YDS)

Introduces an activity for exploring the concepts of pressure. (YDS)