Answers a question about operating frequency of metal locators, discussing signal attenuation due to inverse square law and interaction with conducting media. Compares frequency to conductivity for various media and resultant penetration of media by signal, relating to transmission of extremely low frequency signals for submarine communications by…

The sea urchin provides an ideal embryology laboratory because it is visually representative of the fertilization process in higher animals. Procedures for conducting such a laboratory (including methods for securing specimens) are provided. (JN)

Reports on the outcomes of six national and two international conferences attempting to set guidelines for the continuing development of environmental education. Sponsors, issues addressed, and a summary of the results are included. Comments on the outcome of the 1978 Leadership Conference are also included. (JM)

Describes an approach to teaching interactive computing for physics students beginning with the use of BASIC and video terminals during the first year of study (includes writing solution programs for practical problems). Second year students learn FORTRAN and apply it to interpolation, numerical integration, and differential equations. (JM)

Discusses methods for reducing or eliminating waste disposal problems in the chemistry laboratory, considering both economic and environmental aspects of the problems. Proposes inventory control, shared use, solvent recycling, zero effluent, and various means of disposing of chemicals. (JM)

Provides a set of instructions for writing Lewis octet structures which incorporates a simple rule called the "6N+2 Rule." Discusses the importance of these structures in elementary chemistry, biochemistry, and organic chemistry courses. Also discusses non-octet structures and how they are characterized. (JM)

Describes a cooperative venture in which a private corporation was formed to provide students with real-world experiences, assist in paying for their educational experiences, and provide answers to problems arising from the community in which an educational institution is located. Discusses formation and operation, as well as academic-corporate…

Provides materials needed and procedures to illustrate the reversible color changes in certain organic acids on bases due to changes in pH. The technique employs three indicators which are colorless in acidic solution but form primary colors in basic solutions. Also discusses the free energy curve presented in many textbooks. (JM)

Compared performance of Project Advance biology students (N=60) with Advanced Placement (AP) candidates (N=15,947) nationally on College Entrance Examination Board AP biology test. The research, conducted to determine comparability of the program as valid measures of academic achievement, determined that Project Advance students scored above the…

Discusses using Apple II microcomputers for measuring resistance, temperature, and light intensity. Also discusses digital input and output and timing techniques. Although focusing on Apple II, the circuits and programs described may be applicable to other microcomputers. (JN)

Describes the procedures and equipment for an experiment on the adiabatic expansion of gases suitable for demonstration and discussion in the physical chemical laboratory. The expansion produced shows how the process can change temperature and still return to a different location on an isotherm. (JN)

Outlines a course (offered jointly by physics and applied science departments) which focuses on basic physics and nuclear war effects. Due to the emotional impact of issues discussed in the course, faculty implemented a plan which included the use of counseling professionals. (DH)

Advantages for using 35mm slides to enhance a lesson rather than more expensive films and videotapes are considered. Includes information on: negative (black-on-white) slides; highlighting and opaquing; positive (black-on-white) slides; and white-on-colored background. Suggestions for film types and developing procedures are given. (DH)

Discusses the issue of academic fraud in the form of science research malpractice. Topic areas considered include: malpractice studies; causes of misconduct; normal and deviant research behavior; and distinguished research characteristics in production, reporting, dissemination, and evaluation. Consequences of malpractice and…

Information on bats is provided, focusing on their diversity and distribution, characteristics, food habits, activities, roosting and social habits, reproduction, number of young and size at birth, hibernation, mortality and longevity, and movements and navigation. Additional information related to public health/disease concerns and bat management…