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The Annual Meeting Of The Iowa Academy Of Science April 22-23, 1994 [Program, 106th Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Program Summary --- 5
General Session Speakers --- 9
Awards --- 12
Symposia Programs --- 13
Poster Session --- 18
Map --- Centerfold
Section Programs/Special Sessions --- 22
Agricultural Sciences --- 22
Anthropology --- 23
Botany --- 27
Cellular & Molecular Biology --- 28
Chemistry, Inorganic --- 29
Chemistry, Organic --- 31
Conservation --- 32
Earth Science Teaching --- 34
Engineering --- 34
Geology --- 34
Linguistics --- 38
Nursing --- 39
Physics --- 39
Physiology --- 40
Psychology --- 42
Science Teaching --- 42
Zoology --- 43
Annual Meeting Committee --- 45
Local Arrangements Committee --- 45
IAS …

106th Session Iowa Academy Of Science Awards Luncheon, April 22, 1994, Iowa Academy Of Science

Iowa Academy of Science Documents

Program:

--- Introduction of Head Table - Jean Prior, President, Iowa Academy of Science
--- Recognition of students participating in various statewide activities - Larry Schwinger, Chair, Student Programs Committee
--- Presentation of scholarship winners and 1995 AJAS representatives - Peggy Tilgner, Wartburg College, Waverly
--- Presentation of Excellence in Science Teaching Awards - Roy Unruh, Director, ESTA Program

Iowa Academy Of Science Directory, 1994-95, Iowa Academy Of Science

Iowa Academy of Science Documents

Table of Contents:

Board of Directors ... 3
Program Directors ... 4
Editors ... 6
Committees ... 8
Sections ... 21
ISTS Regional Directors ... 36
Awards of Merit ... 28
Excellence in Science Teaching Awards ... 29
Past Presidents ... 30
Membership Roster ... 31

Cover - Front Matter - Table Of Contents

Iowa Science Teachers Journal

No abstract provided.

Computers In The Science Classroom, Piroz Mohseni

Iowa Science Teachers Journal

Computers have become an integral part of the education system, and computer literacy is an important asset for any college student. Many students find that their exposure to computers at the high school level was not satisfactory. Thus they hesitate to enroll in computer enhanced mathematics or science courses at the college level. This paper discusses some of the avenues for secondary science instructors to incorporate computers into their current curriculum. It also examines computer use to enhance students' understanding of science and mathematical concepts.

Understanding Vs. Knowing, John R. Stiles

Iowa Science Teachers Journal

How well do students understand concepts in science? Are teachers evaluating what students actually comprehend or merely how well they can recite information? How valuable are tests? What do they actually measure? How appropriate are the lessons to the children's developmental levels?

These and similar questions should be an important part of every teacher's evaluation procedure. We need to stop and ask ourselves such questions as: Why do I want my students to know this? Will knowing this make a difference in their lives? Is it important? Do the students really understand this? How can I be sure? From here, …

Measurement In Elementary Science, Barbara A. Bonnett

Iowa Science Teachers Journal

Ten year olds have great difficulty drawing the human face and form in proportion. To see if that skill could be enhanced, our fifth grade class set out to explore human proportion and measurements using metric rulers, meter sticks, graph paper and helpful partners.

An Analysis Of Physical Science Textbooks For Scientific Literacy, Hussein A. Baarah, Trudi L. Volk

Iowa Science Teachers Journal

Developing the scientifically literate individual is considered to be an important objective of science education in the United States (Blough and Schwartz 1990, Maarschalk 1988, Murane and Raizen 1988, National Science Teachers Association 1971, 1982; and Simpson and Anderson 1981). The scientifically literate person understands how science, technology and society influence one another, and is able to use this knowledge in everyday decision making (AAAS 1989, Yager and Harms 1981).

Astronomy Bulletin - The Night Sky: July 5, 1994 To September 24, 1994, Patrick Steven Leiker

Iowa Science Teachers Journal

No abstract provided.

Science Notes - Nabt Announces

Iowa Science Teachers Journal

The National Association of Biology Teachers (NABT) is seeking nominations for five secondary school biology teaching awards. Recipients will be recognized at the NABT National Convention in St. Louis, MO, November 16-19, 1994.

Science Notes - Aviation/Aerospace Teacher Institute

Iowa Science Teachers Journal

Teachers are invited to participate in the Science Center of Iowa's Aviation/ Aerospace Teacher Institute which will be held from 8 a.m. to 5 p.m., July 11-15, 1994. Teachers will receive classroom materials and training in a number of space-related activities. Activities will include simulating an aerospace flight and the design of the first Martian city.

Science Notes - Ice Cream: An Edible Experiment In Thermodynamics

Iowa Science Teachers Journal

Ice keeps things cold because it absorbs energy from its surroundings, melting as it does so. The temperature at which a solid melts, called its melting point, is the same temperature at which the liquid form freezes. For pure water, this is 0° or 32° F. However, if some other substance, such as salt, is added to the water or ice, the freezing/melting point temperature is lowered. Thus, you can use salted ice to freeze liquid water.

Science Calendar

Iowa Science Teachers Journal

No abstract provided.

Science Notes - Papers Solicited For Biology Curriculum Workshop

Iowa Science Teachers Journal

A workshop focusing on "Integrating Biology Across the Curriculum" will be held September 23-24, 1994. Educators are invited to submit abstracts describing exemplary integration strategies and information about successful and unsuccessful programs.

Editor's Corner - Editorial Privileges, Carl W. Bollwinkel

Iowa Science Teachers Journal

The editorship of the Iowa Science Teachers Journal has brought many privileges to this editor. Perhaps the greatest of these is the responsibility of determining what is most helpful for Journal readers and authors-those who establish the standards of science education in Iowa. This has not been an easy task and has often led to disagreement. This disagreement has been the basis of professional growth for writers, readers and editors-especially this editor. It is truly a privilege to maintain standards of quality.

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

Iowa Science Teachers Journal

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Influence Of Reduced Leaching On Growth Of Seedlings Of Black Locust Inoculated With Rhizobia, William R. Graves, Sandra R. Anfinson

Journal of the Iowa Academy of Science: JIAS

Seedlings of black locust (Robinia pseudoacacia L.) were inoculated with compatible rhizobia and irrigated twice each week with solution containing either 50 or 150 mg nitrogen/L. Leaching fraction treatments of 0, 0.2, or 0.4 were maintained for 6 weeks. Seedlings supplied 50 mg nitrogen/L grew poorly compared co planes supplied 150 mg nitrogen/L regardless of leaching fraction. Dry masses of shoots and of entire planes were lower for seedlings in the 0 and 0.2 leaching fraction treatments compared with chose in the 0.4 treatment. Neither leaching fraction nor applied nitrogen concentration appeared co affect the number of nodules per plant, …

Age And Developmental History Of Iowa Fens, C. A. Thompson, E. A. Bettis Iii

Journal of the Iowa Academy of Science: JIAS

Iowa fens are small, mineorotrophic peatlands maintained by shallow groundwater. Eighteen fen sites located across northern Iowa were mapped and radiocarbon dated to assess the timing of initial peat accumulation. The radiocarbon ages span the Holocene, ranging from 1,240 to 10,900 B.P.; however most fens postdate 5,000 yr B.P. The dominance of late-Holocene ages suggests that Holocene climatic change may have strongly influenced the record of peat accumulation. During the mid-Holocene Iowa was warmer and drier than at present, and peat was degraded or accumulated slowly in fens. The range of ages also implies that the commencement and subsequent rate …

Conceptual Representation Of The Newtonian Model Of Motion In University Physics Students, Yannis Hadzigeorgiou

Dissertations and Theses @ UNI

The purpose of this study was to investigate how undergraduate students at the University of Northern Iowa who had taken prior coursework on non-calculus general physics with a unit on mechanics understand the Newtonian model of motion. In general, the study was concerned with reasoning strategies, the preconceptions that give rise to these strategies, and the schema that might be inferred from the preconceptions. In particular, the study focused on the three fundamental notions of the Newtonian model of motion: {a) that uniform straight line motion is equivalent to rest, {b) that motion is relative to an inertial frame of …

The Iowa Academy Of Science Parish Farm: 1986-1992, David L. Dozark

Journal of the Iowa Academy of Science: JIAS

This article focuses on the Iowa Academy of Science Parish Farm and the progress made in the last seven years towards the goals set forth in the Model Farm Concept which was adopted by the Academy in 1970. Highlights of this article are a summary of the income and expenses associated with the farm's highly profitable crop production, the ground-water monitoring project being conducted by the Geological Survey Bureau, the woodlot rejuvenation project, soil and wildlife conservation improvements, and the prairie forbes exhibit area. The farm continues to serve as a primary source of income for the Academy and a …

Post-Natal Survival Of Raccoons In Relation To Female Age And Denning Behavior, Jonathan J. Judson, William R. Clark, Ronald D. Andrews

Journal of the Iowa Academy of Science: JIAS

We measured post-natal survival of radio-collared raccoons 1-5 months old in southwest Iowa, 1988-1989. We compared survival of young nurtured by yearling and adult females and related den site selection to survival functions using proportional hazards models. Adult females used upland and farmstead habitats note frequently than yearlings, whereas yearling females used lowland habitats note frequently. Tree cavities and beds on the ground were used most frequently. Adult females denned in buildings 13% of the time and in holes in the ground 9.5% of the time, whereas yearlings frequently tested with litters in beds on the ground (31%). Microhab1tat characteristics …

Effects Of Competition And Predation On Prothonotary Warblers And House Wrens Nesting In Eastern Iowa, Timothy Brush

Journal of the Iowa Academy of Science: JIAS

In a fragmented midwestern floodplain forest, a small Prothonotary Warbler (Protonotaria citrea) population experienced high competition with House Wrens (Troglodytes aedon) and mammalian nest predation in 1988-89. Despite the provision of 3 types of nest boxes and higher water levels, Prothonotary Warblers did not nest successfully and decreased in the fragmented forest in 1990-91. House Wrens used >90% of the nest boxes in both years. Wren territories doubled within the nestbox area, while remaining constant on an unmanipulated area. In contrast, a larger warbler population had high nesting success during 1990-91 in a relatively unfragmented, wetter forest tract. Such forests, …

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

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Research Papers By 1992 And 1993 Interns In The Program For Women In Science And Engineering At Iowa State University, Mary Ann Evans, Krishna S. Athreya

Journal of the Iowa Academy of Science: JIAS

The papers in this volume offer a sampling of the outstanding work of high school and undergraduate interns who participated in the 1992 and 1993 Program for Women in Science and Engineering (PWSE) summer internship programs. From synthesis of materials to developing effective methods of hazardous waste disposal, from nondestructive structural studies at the macroscopic level to microstructural analyses of materials, from testing precision of sensors used as aids in agriculture to isolating effects of specific parameters on plant growth, to name a few, these papers span a wide range of scientific methods and disciplines. They serve as testimony to …

Crystal Structure Of An Iodine Phenazine Complex: C12h9n2 + · I3-. C12h8n2 · 1/6i2, Rebecca A. Brandenburg, Sharon L. Ringrose, Robert A. Jacobson

Journal of the Iowa Academy of Science: JIAS

A structural study of the polyiodide containing species C₁₂H₉N₂⁺ I₃^- C₁₂H₈N₂ · 1/6I₂ was carried out by single crystal X-ray diffraction techniques. The material crystallizes in the monoclinic space group C2/m with a= 16.561(5), b = 8.372(2), c = 9.908(5) A and β = 111.24°. There are two molecules per cell. Dara were collected using Mo K_ἀ radiation and refinement converged to R = 0.027 based on the 1996 unique reflections with |F_o|≥3δ(F_o). The iodine atoms were found coexist in two …

Removal Of Magnetic Impurities From Strontium Copper Oxychloride, Colleen B. Eads, Carol J. Kosmicke, Lance L. Miller

Journal of the Iowa Academy of Science: JIAS

Analyses of a copper-deficient series of Strontium Copper Oxychloride polycrystalline samples are reported. Magnetic susceptibility, X-ray powder diffraction, and differential thermal analyses show a small Curie-type magnetic signal correlates with =0.6% (excess) copper ions in the nominally stoichiometric material. The analyses also imply that the extra magnetic signal is from an impurity phase, possibly related to Strontium Copper Oxide. The concentration of the impurity phase can be controlled by varying the copper stoichiometry.

Testing The Accuracy And Precision Of Wetness Sensors In A Tomato Field And On Turfgrass, Kara J. Potratz, Mark L. Gleason, Melanie L. Hockmuth, Sharon K. Parker, Glenn A. Pearston

Journal of the Iowa Academy of Science: JIAS

Measurements of dew-period duration by painted, flat-plate, electronic wetness sensors at the top of the plant canopy in a tomato field and on adjacent turfgrass were compared with visual observations. The response range of sensors during the onset of dew sometimes exceeded 5 hr. but was less than 1 hr. on other nights. Sensors in the tomato field indicated dew formation occurred as much as 2 hr. earlier or later than dew became visible on adjacent tomato leaflets at the top of the crop canopy. A calibration threshold for sensors derived from a drying curve resulted in the underestimation of …