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Editorial Office & Staff; Officers, Iowa Academy Of Science; Executive Board & Regional Directors, Iowa Science Teachers Section

Iowa Science Teachers Journal

No abstract provided.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Index For Volume 98

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Science Notes - Book News: Biotechnology: Microbes And The Environment, Ross L. Iverson

Iowa Science Teachers Journal

Microbes and the Environment is the third "BriefBook" to be published by the Center for Science Information (CSI). CSI is a nonprofit organization with the goals of improving decision makers' basic level of science understanding so that they can make informed decisions and better educate the public.

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Studies Of The Precambrian Geology Of Iowa: Part 2. The Matlock Keratophyre, Kenneth E. Windom, Karl E. Seifert, Raymond R. Anderson

Journal of the Iowa Academy of Science: JIAS

Felsic pyroclastic rock occurs in the Precambrian basement in northwestern Iowa. This rock was recovered by drilling and originally logged as rhyolite; however it is severely depleted in K₂O, Rb, Ba, Cs, and other mobile elements and is more properly called keratophyre. The volcanic unit lies atop a layered mafic/ultramafic complex and contains xenoliths of gabbro apparently derived from the layered body. These xenoliths are severely altered and are composed of secondary hydrated and carbonated minerals. The gabbros are enriched in incompatible trace elements, whose abundance patterns complement those of the keratophyre. Trace element abundance patterns for the …

In Search Of A Gibberellin Receptor, Lalit M. Srivastava, Konrad A. Sechley

Journal of the Iowa Academy of Science: JIAS

Use of tritiated gibberellins ([³H] GA₁, [³H] GA₄) of high specific activity and purity has allowed the determination of GA-specific binding sites in several plant tissues both in vivo and in vitro. In cucumber hypocotyls and pea epicotyls which have been most investigated the binding of [³H] GA; occurs to soluble proteins. This binding is saturable ('n' =about 30 pmol. Mg^-1 soluble protein), of high affinity (K_D= about 70 nM), and is competed for by other GA, and derivatives in proportion to their biological activity in these …

Science Notes - Applications Invited For Project Esteem

Iowa Science Teachers Journal

Project ESTEEM (Earth Science Teachers Exploring Exemplary Materials) will hold another summer workshop for teachers at Harvard University's Center for Astrophysics in Cambridge, Massachusetts, July 3-26, 1992. The goal of Project ESTEEM is to develop a nation-wide network of earth-science resource agents to promote an increase in activity-based teaching in American schools. Forty earth-science teachers from across the U.S. will be selected to participate.

Mystery Powders A La The Learning Cycle, William Bluhm

Iowa Science Teachers Journal

Even as the 1990s seem to be ushering in a new wave of "hands - on" science, one cannot help but look back to the late 1960s when a previous wave of experiential science programs was crashing ashore. Two programs notable among those spawned during the late 1960s and early 1970s were Elementary Science Study (ESS) and the Science Curriculum Improvement Study (SCIS). ESS units, originally a group of fifty-six independent units covering topics from the physical, biological and earth sciences for K-9, incorporated an instructional strategy called "messing around." "Messing around," which took place during the early portion of …

Science Notes - Onion's Fusible Alloy Sample, Stephanie A. Althof

Iowa Science Teachers Journal

Flinn Scientific, Inc., is offering free samples of a special alloy designed for use in melting-point activities. "Onion's Fusible Alloy" has a melting point nearly 15 degrees Fahrenheit below the boiling point of water.

Meeting Iowa School Accreditation Standards Through Sts Science, John B. Cook

Iowa Science Teachers Journal

The National Science Teachers Association (NSTA) has declared that the goal of science education" ... is to develop scientifically literate individuals who understand how science, technology and society influence one another and who are able to use this knowledge in their everyday decision-making" (NSTA 1982). Strategies aimed at achieving this goal have been endorsed and promoted by a variety of groups. Yet, in many Iowa schools, the science curriculum is driven by traditional textbooks that emphasize narrow academic goals. Iowa school accreditation standards list specific requirements for the science program in grades 1-12. In addition, seven horizontal infusion areas must …

The Wasberg Effect, Thomas H. Vertrees

Iowa Science Teachers Journal

Working on demonstrations that were considered useful and graphic teaching tools received considerable energy from the participants at the North West Workshop for Teachers of Chemistry (NWW) under the direction of Dr. Glenn Crosby at Washington State University in 1987. Some new demonstrations were developed, but most of the effort was spent dealing with traditional and published successful teaching aids to make the directions uniform and clear, even to teachers without extensive chemistry training, and to perfect directions that would work every time.

Paper Airplanes: A Critical Thinking Model, William Bluhm, Martha M. Kronholm

Iowa Science Teachers Journal

What upper elementary school teacher during his or her career hasn't had to deal with the occasional illicit flight of a paper airplane? Children show an interest in airplanes--from the paper variety to model planes to the real thing. From an educational standpoint, it would seem beneficial to make use of this interest. One possibility within the arena of the science class would be to use the paper airplane as a vehicle (no pun intended) for hands-on activities utilizing such sophisticated critical thinking skills as controlling variables, hypothesizing and experimenting.

Science News - Newsletter Available On Earth Science Education

Iowa Science Teachers Journal

The American Geological Institute recently began offering an earth science newsletter to interested educators. The Earth Science Education Connection newsletter is a networking tool designed to share information with the diverse and increasing number of individuals and organizations interested in earth science.

A Survey Of School/Business Partnerships, Edward Bryan Roberts

Iowa Science Teachers Journal

Good science teachers enrich their classes in a variety of ways with creative use of media and hands-on laboratory exercises. They also use community resources successfully to stimulate student interest (traditionally in the form of field trips and guest speakers). An extension of this idea is for educators to create an alliance or partnership with a business or other organization. The goals of the survey reported here were to discover the thoughts of people with an interest in partnerships or alliances and for the Iowa Alliance for Science to use this information to help facilitate partnerships.

Microscale Cartesian Diver Activities, John J. Mauch

Iowa Science Teachers Journal

Because air has weight, it exerts pressure. The air in a room can weigh as much as 100 kilograms, which is the weight of a large person. Air can also be compressed into small containers, such as those used by underwater divers. Teachers can construct several toys called Cartesian divers which will rise and fall exactly as a diving bell does. The toys are called "Cartesian" because the principle of moving diving machines by air pressure was first explained by Rene Descartes, a 16th century mathematician. This exercise is divided up into four parts: "A Cartesian Retriever," "The Cartesian Helicopter," …

Science Notes - Program For Leadership In Earth Systems Education Workshops

Iowa Science Teachers Journal

The Program for Leadership in Earth Systems Education (PLESE) has announced its 1992 Summer Workshop program. The program will serve groups of teachers at two sites, Ohio State University in Columbus and the University of Northern Colorado in Greeley.

Earthworm Day, Kenneth W. Thompson, Deborah K. Thompson

Iowa Science Teachers Journal

Using live animals in the elementary science classroom fosters enthusiasm and encourages curiosity. The earthworms discussed in this article, commonly called night crawlers, are easy to find in Iowa in moist garden soil or around lawns. Earthworms are often used as fishing bait and, because of this, are readily available at reasonable prices from commercial bait dealers or backyard entrepreneurs. Besides their availability and low cost, earthworms are relatively hardy and easily handled by elementary students. For these reasons, and because of the very important role earthworms play in the environment, they were selected to be the focus of the …

Stimulus Response Coupling In Auxin Action, K. R. Libbenga

Journal of the Iowa Academy of Science: JIAS

This paper not available at time of printing.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Iowa Academy Of Science Directory, 1991-92: Officers, Committees, And Membership Roster, Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Board of Directors ... 5
Program Directors ... 6
Editors ... 6
Committees ... 8
Sections ... 21
Awards of Merit ... 26
Excellence in Science Teaching Awards ... 28
Past Presidents ... 30
Membership Roster ... 31

Science Notes - Resources For Earth Science Teachers 1991, Jonna M. Higgins

Iowa Science Teachers Journal

The American Geological Institute is offering educators a free listing of available materials titled "Resources for Earth Science Teachers 1991."

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Journal Of The Iowa Academy Of Science Submission Form And Instruction Sheet

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Annual Report Of The Iowa Academy Of Science, 1989-90, Paul E. Rider

Journal of the Iowa Academy of Science: JIAS

Starting in 1976, annual reports have served as a continuing record of the activities of the Iowa Academy of Science. These augment a 100 year history of the Academy which was written in the centennial year of 1975.

This report covers the period from July 1, 1989 to June 30, 1990. It is based on the official records of the Academy (committee reports, Board minutes, correspondence) as well as the recollections, impressions and musings of the author.

Comparison Of Mass Selection And S1 Testing Recurrent-Selection Methods In Sorghum, R. E. Secrist, R. E. Atkins

Journal of the Iowa Academy of Science: JIAS

Mass selection and S₁ testing are often used for the improvement of sorghum [Sorghum bicolor (L.) Moench] populations. Both recurrent selection methods have a place in applied breeding programs and should be used where they are likely to be most advantageous. S₁ families of a random-mating sorghum population mass selected three cycles (C3) for individual-panicle weight [IAP1R(M)C3] were compared with S₁ families from a population (C3) advanced from the same base (CO) population by using replicated yield tests in each cycle [ IAP4R(S₁)C3]. Our objectives were to compare the performance in C3 of families developed …

Estimates Of Quantitative Genetic Parameters M Iap2b(M) Random-Mating Sorghum Population, A. J. Maves, R. E. Atkins

Journal of the Iowa Academy of Science: JIAS

Random-mating populations of sorghum [Sorghum bicolor (L.) Moench] are used extensively as germ plasm in the development of parental lines for hybrids. Populations improved by recurrent selection provide a useful source for the selection of superior parental lines. Our objective was to determine the effectiveness of mass selection for threshed-panicle weight by comparing the performance of lines (S₁ families) chosen randomly from CO and C4 of sorghum population IAP2B. Sixty S₁ families from each cycle were grown in five Iowa environments.

Four cycles of selection for panicle weight shifted the mean for grain yield favorably, and the range …

Back Matter; Editorial Office & Staff; Officers, Iowa Academy Of Science; Executive Board & Regional Directors, Iowa Science Teachers Section

Iowa Science Teachers Journal

No abstract provided.

Science Notes - Tall Grass Moon Workshop

Iowa Science Teachers Journal

The Tall Grass Moon environmental education workshop for teachers, naturalists and environmental educators will be held August 9-11 at the Conservation Education Center near Guthrie Center, Iowa.