Science and Mathematics Education Commons^™

Results Of The August Roadside Survey For Upland Wildlife In Iowa: 1963-1988, Willie J. Suchy, Ronald J. Munkel, James M. Kienzler

Journal of the Iowa Academy of Science: JIAS

Results of the August roadside survey collected from 1963 through 1988 were examined to determine if trends could be detected in the counts of ring-necked pheasants (Phasianus colchicus), northern bobwhite (Colinus virginianus), gray partridge (Perdix perdix), cottontail rabbits (Sylvilagus floridanus), and white-tailed jackrabbits (Lepus townsendii). The counts also were compared to harvest estimates co determine if correlations exist. Statistically significant linear trends were detected statewide for pheasants, gray partridge and jackrabbits during the 1963 co 1988 period. Trends were downward for all species except gray partridge. During the late 12 years (1977 through 1988), the only significant trend detected was …

The Role Of Mechanical Injury In An Experimental Transmission Of Flexibacter Columnaris To Fingerling Walleye, Manzoor Hussain, Robert C. Summerfelt

Journal of the Iowa Academy of Science: JIAS

The role of mechanical injury in transmission of Flexibacter columnaris to walleye fingerlings (Stizostedion vitreum vitreum) was investigated. Two groups (1 and 2) of 10 fish each, 7 to 9 cm total length, were exposed to a suspension of F lexibacter columnaris containing 3 X 105 cfu/ mL; fish in group 1 were injured with a scratch along their flank; fish in group 2 were not injured. Two control groups (3 and 4) of 5 fish each were exposed to a sterile broth; group 3 was injured with a scratch and group 4 was not. In 72 h, morbidity was …

Front Matter

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Middle Woodland Field Camps In The Cedar Valley, Michael J. Perry

Journal of the Iowa Academy of Science: JIAS

Archaeological survey and testing of two proposed road projects within the Cedar River valley resulted in the location of several prehistoric occupational sites. Ceramics recovered at three of the sites, 13LN226, 13LN236, and 13LN243, are identified as late Middle Woodland period specimens, dating to ca. A.D. 200. The three sites border Cedar River tributaries, occupying high terrace formations within the broad bottomlands of the Cedar valley. The type and distribution of artifacts suggest that 13LN236 and 13LN243 functioned as repeatedly utilized, short-term extractive and processing camps. Previous research at sites of similar age focused on small, protected rockshelters and large, …

A Study Of Sphacelotheca Occidentalis, Cause Of Kernel Smut Of Big Bluestem, Karen M. Snetselaar, Lois H. Tiffany

Journal of the Iowa Academy of Science: JIAS

Sphacelotheca occidentalis causes kernel smut disease of Andropogon gerardii, a prairie grass. The smut fungus is systemic, perennial, causes severe stunting, and sporulates in florets. Spores develop in gall-like sari composed of grass and fungal cells. Spores initiate in a meristematic area near the base of the sorus, and progressively more mature spores are found toward the sorus rip. The cylindrical sari have a central columella of host vascular tissue permeated by hyphae, sporogenous hyphae and developing teliospores that surround the columella, and a peridium of host and fungal cells. Sporogenous hyphae ramify in a gelatinous matrix that disappears as …

Editorial Board & Iowa Academy Of Science Officers And Directors

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Back Cover

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Cover - Table Of Contents

Journal of the Iowa Academy of Science: JIAS

No abstract provided.

Iowa's Climate As Projected By The Global Climate Model Of The Goddard Institute For Space Studies For A Doubling Of Atmospheric Carbon Dioxide, E. S. Takle, S. Zhong

Journal of the Iowa Academy of Science: JIAS

Results of a global climate model that simulates climate under a doubling of atmospheric carbon dioxide (estimated to occur by the latter half of the twenty first century) have been interpolated to Iowa. Summer temperatures under such a doubling are projected to rise by 4 to 7°F (2.2 to 3.9°C) and winter temperatures by 10 to 11° (5.6 to 6.1°C). Estimates of space heating and cooling demands from these data suggest a 30 to 35% decrease in space heat demand and a 200 to 300% increase in space cooling demand. Temperature variability is projected to decrease. Precipitation estimates from global …

Comparison Of Dinitrogen Fixation And Nitrogen Transfer Potentials Of Four Red Clover Cultivars, D. E. Farnham, A. P. Mallarino, W. F. Wedin, I. T. Carlson

Journal of the Iowa Academy of Science: JIAS

The capacity to fix atmospheric N₂ and thus reduce the use of N fertilizer is an important reason for including legumes in forage mixtures. Selection for more efficient N₂ fixation could improve red clover (Trifolium prateme L.) (RC) production and its contribution to soil fertility. An isotope dilution study was conducted in two greenhouse experiments to compare the N₂ fixation and N transfer potentials of three commercial and one experimental RC cultivars. The experimental cultivar APR-8701 was selected for traits related to increased N₂ fixation (rate of acetylene reduction, root size and branch number, and nodule …

Studies Of The Precambrian Geology Of Iowa: Part 1. The Otter Creek Layered Igneous Complex, Kenneth E. Windom, Karl E. Seifert, Raymond R. Anderson

Journal of the Iowa Academy of Science: JIAS

Rocks from a buried igneous body, herein called the Otter Creek layered igneous complex, were recovered by drilling in Archean rocks in northwestern Iowa. This complex consists of layers of ultramafic and mafic cumulate rocks, including bronzitite, harzburgite, dunite, gabbro, and anorthosite. These rocks have been subjected to low-grade metamorphism with a patagenesis including serpentine, chlorite, talc, uralitic amphiboles, magnetite, albite, epidote, sericite, and minor quartz and calcite. During its intrusion, the magma which gave rise to the layered body engulfed a large block of rock consisting of banded iron formation and thin lamprophyre dikes. Both the iron formation and …

Annual Report Of The Iowa Academy Of Science, 1990-91, 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, 1990 to June 30, 1991. 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.

An Annotated Checklist Of The Vascular Plant Flora Of Guthrie County, Iowa, Dean M. Roosa, Lawrence J. Eilers, Scott Zager

Journal of the Iowa Academy of Science: JIAS

The known vascular plant flora of Guthrie County, Iowa, based on field, herbarium, and literature studies, consists of 748 taxa (species, varieties, and hybrids), 135 of which are naturalized. Species which appear on the state's list of endangered and threatened species, or are otherwise rare, are discussed.

There is an affinity of the plants of Guthrie County with those of the Ozark plateau, and with specialized habitats providing extensions of ranges for species normally found farther north or east.

Vascular Flora Of Arend's Kettle, Freda Haffner Kettlehole State Preserve, Dickinson County, Iowa, Edwin L. Freese, William J. Platt

Journal of the Iowa Academy of Science: JIAS

Arend's Kettle is a 5 ha glacial landform in Dickinson County, Iowa. The flora of this kettle was studied over two years prior to acquisition by the Nature Conservancy in 1973. The known vascular flora of Arend's Kettle as of 1973 consisted of 299 species, representing 177 genera and 59 families. The vegetation ranged from xeric short grass prairie along the rims of the kettle to mesic prairie along the middle and lower slopes. In the bottom of the kettle, there was a marsh/seasonal pond community that varied greatly in the amount of water present, depending on rainfall within the …

Predicting Success Of Entering Freshman Biology Majors Taking Either Biology Or Biology And Chemistry, Sue Ann Smith

Dissertations and Theses @ UNI

The purpose of this study was to determine if the American College Test, high school percentile rank, and the number of previously-taken courses in math and science individually, collectively, or in some combination correlate with cognitive levels of development in predicting the success of entering freshman biology majors taking either biology or biology and chemistry concurrently. Success was measured using the students' grade or grades in either biology or biology and chemistry at the end of their first semester. The subjects for this study were entering freshman biology majors at the University of Northern Iowa who ranged in age from …

Astronomy Resources, Thomas Hockey

Iowa Science Teachers Journal

A visual survey of all nine major planets is a standard way of beginning a series of lessons in solar-system astronomy. One of the pitfalls of such a slide program is that the different worlds of the Solar System tend to blur together in students' minds. To separate my topics, I have prepared a set of title slides. The street sign motif underscores the theme of "touring" the Solar System.

Cooperative Learning And Its Relationship To Motivation And Achievement When Working Math Lab Problems In Principles Of Technology, Mark Edwards Rhoads

Graduate Research Papers

Working together in a dynamic group process has been shown to be highly effective in maximizing learning outcomes and helping students realize greater academic and social skills (Glasser, 1986). A great deal of research has been conducted on the relationship of cooperative, competitive, and individualistic efforts and instructional methods (Johnson, Johnson & Holubec, 1988). Johnson and his associates in 1981 (as cited by Wood, 1987) revealed that instruction focusing on cooperation and collaboration resulted in significant gains in achievement, self-esteem and social development. Many viable and successful forms and hundreds of thousands of enthusiastic adherents have realized extraordinary successes using …

The Annual Meeting Of The Iowa Academy Of Science April 20-21, 1990 [Program, 102nd Meeting], Iowa Academy Of Science

Iowa Academy of Science Documents

Contents:

Program Summary --- 5
General Session Speakers --- 9
Awards --- 12
Distinguished Fellow --- 12
Distinguished Service --- 13, 14
Symposia Programs --- 15
Poster Session --- 17
Campus Map --- Centerfold
Section Programs --- 22
Agricultural Sciences --- 22
Anthropology --- 25
Botany --- 26
Cellular & Molecular Biology --- 28
Chemistry, Inorganic --- 30
Chemistry, Organic --- 34
Conservation --- 37
Earth Science Teaching --- 39
Elementary Science Teaching --- 40
Engineering --- 42
Geology --- 47
Linguistics --- 48
Nursing --- 49
Physics --- 50
Physiology --- 53
Psychology --- 54
Science Teaching --- 56 …

The Need For Creativity In The Science Classroom, Lowell Wiele

Iowa Science Teachers Journal

To recognize the need for creativity in the classroom as one of the growing concerns in the educational community today is not difficult. When the various teaching methods in science are evaluated, the highly pronounced need for more creativity in science instruction is evident. Few teachers, it seems, experiment actively with teaching techniques and curriculum materials. Most find what works for them and stick with it, and, often, this means teaching science as a lecture course (with some group discussion and a few laboratory experiences). Beginning teachers tend to imitate the persons they considered to have been their best teachers. …

Cover - Front Matter - Table Of Contents

Iowa Science Teachers Journal

No abstract provided.

Easy Microscale Electrolysis Of Water, Marie C. Sherman

Iowa Science Teachers Journal

The following is a quick, easy, visible demonstration which makes an eye-catching introduction to electrochemistry and electrolysis.

Technology Available To Iowa Teachers Through Area Education Agencies, Jack A. Gerlovich, Paul Joslin

Iowa Science Teachers Journal

Recently, we have, as a nation, come to realize the vital need for technology literacy among our citizens if we are to cope in a global society. Iowa educational leaders are striving to gain a competitive edge m this area. Working for this edge, the Iowa Department of Education has hired a technology consultant, and guides are being refined to help educators address the topic in their curricula. Standards have been adopted by the State Board of Education relative to telecommunications in Iowa classrooms.

Science Notes - Summer Workshops At Harvard University

Iowa Science Teachers Journal

The Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts, has announced the availability of two teacher workshops for the summer of 1991. Both workshops are continuations of ongoing projects designed to build teacher-agent networks to increase the use of activity-based science teaching across the United States.

Science Notes - Science Leadership Institute

Iowa Science Teachers Journal

The National Science Supervisors Association is sponsoring a one-week institute for Science Leadership at Southern Illinois University's Edwardsville Campus from July 28 to August 2.

Science Notes - New Junior Academy Director

Iowa Science Teachers Journal

Russ Wiley was recently appointed director of the Iowa Junior Academy of Science. He replaces Joe Moore who has left the state. Wiley is currently an assistant professor in the Department of Chemistry at the University of Northern Iowa.

Editor's Corner - A Letter To The Editor: Commentary On A Recent Survey Of Iowa Chemistry Teachers, Erwin W. Richter

Iowa Science Teachers Journal

In the fall of 1989, I conducted a survey of chemistry teachers in the state of Iowa to gather information on the current conditions of chemistry teaching and the continuing education needs of chemistry teachers. This survey asked chemistry teachers about their training in science and chemistry, the percentage of students in their schools who elect to take chemistry, the text books in current use, the amount of time spent in laboratory experimentation and what they saw as their greatest need for update workshops.

Courting A Prairie??, Arnold H. Webster

Iowa Science Teachers Journal

No abstract provided.

Bug Zoo, Martha Voyles, Deborah Charnetski

Iowa Science Teachers Journal

We envisioned a conversation something like this taking place at the dinner table of one of our students who had read a chapter on animal habitats that day in school. This imaginary conversation was the impetus for the idea of a classroom "bug zoo." Our goal was to supplement the school district's curriculum with activities that emphasized science process skills and promoted the enjoyment of science and scientific activity. Because we felt that the skills necessary for reading nonfiction are a critical aspect of science instruction, we were committed to using our district's text. We hoped our project would help …

Astronomy Bulletin - The 1991 Winter Sky, P. Steven Leiker

Iowa Science Teachers Journal

No abstract provided.

Science Notes - Environmental Issues Instruction Workshop

Iowa Science Teachers Journal

Iowa educators have the opportunity to study Environmental Issues Instruction this year thanks to a grant from the Resource Enhancement and Protection (REAP) act fund. The monies received will cover graduate tuition costs for educators enrolled in the program and part of the expenses of materials and room and board at instructional sites around the state.