Presents a method suitable for intermediate level astronomy courses for the calculations of solar eclipses which avoids spherical trigonometry. (Author/CS)

Develops a coordinate-free approach to Fresnel's equations for the reflection and refraction of light at a plane interface. Describes a graphical construction for finding the vector amplitudes of the reflected and transmitted waves. (Author/CS)

Discusses a proof for determining the localized fringes position arrived at when one considers the interference of two extended sources when one is able to observe fringes only at certain points in space. Shows how the localized fringes may be found in a device used to observe Newton's rings. (Author/CS)

Provides background information about the current state of a new field of science, genetic toxicology. Discusses mutations and cancer, the history of the field, and detection of genetic damage. (CS)

Deals with the conversion of electronic hand calculators to timing devices. This article illustrates a conversion of a rather versatile calculator by means of simple and inexpensive circuitry. (HM)

A wealth of printed resource material is available to the chemistry teacher in periodicals, and it is an essential source of enrichment and background material for the practicing teacher. Access to the periodical literature and regular use of it will enable the teacher to supplement the textbook and bring his own knowledge up-to-date. (Author/BB)

The abundance and distribution of the elements on the earth can, in part, be explained in terms of chemical properties such as reduction potentials, solubilities, ionic size, densities, melting points, and pH. The relative abundance of the elements, their distribution, and their concentration, particularly on the earth, are discussed. (Author/BB)

Discusses theories and research concerning the radiation produced by electrons when they are accelerated centripetally in particle accelerators. (MLH)

Compared is the mass of a dozen eggs with the mass of air in an empty refrigerator. An answer and reasons for the answer are provided. (YP)

Lists 46 household chemicals readily available at local stores by common name, chemical name, chemical formula, and typical commercial source. Suggests that school budgetary constraints can be eased by this practice and that students can become more chemically literate as consumers. (JJK)

Describes the use of classroom-quality barometers and the construction of a simple and convenient model. (WRM)

When it comes to selecting science trade books, there are plenty of lists and guides that identify good books; however, when it is time to create a unit or add to the classroom library, selecting appropriate books can still be a challenge. Recommended books may not be available in the school or local libraries, and budget constraints may prohibit…

Forty-eight new secondary science teachers participated in a study that required a listing, discussion, and application of criteria to rank three chemistry laboratory procedures. The three similar lab procedures involved synthesis of a compound from its elements. The top criteria noted by teachers focused on procedural issues (i.e., timeliness,…

This book emphasizes children's learning and is filled with recipes and formulas. The goal of this book is to connect students to the past, provide links to nature, show the importance of science in everyday life, and help students see themselves as part of a global community. Many of the recipes and formulas in this book have multicultural…