Answers a student's question about the emission of a positron from a nucleus. Discusses the problem from the aspects of the uncertainty principle, beta decay, the Fermi Theory, and modern physics. (YP)

Scientific challenges are presented to motivate secondary and college students in creative thinking and scientific problem solving. Student solutions to the "Create-a-Creature" challenge are presented and six new challenges are issued. (PEB)

The document is comprised of 91 career-related science modules for junior high school students, indexed by the learning activity's title and cross-referenced by occupation. The modules are intended for use in an individualized science program, either as an ongoing curriculum supplement or as a discrete unit. Integrated with the presentation of…