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Rock And Mineral Exchange Service

Iowa Science Teachers Journal

Elementary and Secondary school science teachers interested in swapping rocks, minerals, and other earth science materials are hereby notified that a clearinghouse for earth science materials exchange has been established in Arlington Heights, Illinois.

Conservation And The Biology Teacher, M. E. Stempel

Iowa Science Teachers Journal

Conservation practices are based on a need to retain the best features of soils, plants, and animals. These are the raw materials of commerce. Commercialization has accelerated until most land areas are now exploited.

Instructional Aid On Chromatography Available

Iowa Science Teachers Journal

"How to Use Chromatography as a Science Teaching Aid," by Frank M. Ganis, Chairman, Department of Biochemistry, School of Dentistry, University of Maryland, Baltimore, outlines five procedures to separate mixtures of chemical substances. Each method stresses a new aspect of chromatography, progressing from simple to more complex techniques.

The Imbalance Of Nature, Chalmer J. Roy

Iowa Science Teachers Journal

On this fantastically dynamic planet, what can be the meaning of the balance of nature? The dynamics of the atmosphere, of the oceans, and of the solid earth show no signs of reaching an equilibrium, a condition of no change. Nature does not obey laws. The so-called laws of nature are human constructs, designed to explain observed relationships and phenomena.

Back Cover

Iowa Science Teachers Journal

No abstract provided.

Iowa Outdoor Education Center Planned

Iowa Science Teachers Journal

Hawkeye Naturama, a proposed recreation center designed to improve outdoor recreation and outdoor education experiences for all of Iowa's citizens as well as out-of-state tourists, is in the initial development stage.

Expected Student Outcomes In Earth Science Investigations, John F. Thompson

Iowa Science Teachers Journal

One of the basic precepts in science teaching is the Futility Factor: no laboratory investigation is ever a complete failure . . . it can always serve as a bad example. There will always be some kind of result when students do investigations. Whether the outcome is expected or not is another question. Occasionally in a classroom investigation the "wrong" outcome is the only result. At times like this we doubt the results obtained even by the authors of the investigation.

What Do I Do Now, Teacher?????, Milbert H. Krohn

Iowa Science Teachers Journal

Fifteen years of science fairs has brought me into contact with excitement, danger, success, failure, and freakishness such as never could be known if the spontaneity and creativity of youth had not been challenged. The writer is not sure whether science fairs are necessary or not. Sometimes, after they are over, the justification for another is like hitting yourself on the head with a hammer because it feels so good when you stop. Let's go back, readers, to some things in the past.

Aseptic Culture Of Arabidopsis Thalian: A Flowering Plant That Can Be Handled Like A Microorganism, Sujit K. Dhar

Iowa Science Teachers Journal

Arabidopsis thaliana (L.) Heynh. belongs to the tribe Arabideae of the Cruciferae. The plant occurs throughout Europe, East Africa, and Northern and Central Asia.

Nabt Convention In Philadelphia In October, 1969

Iowa Science Teachers Journal

The National Association of Biology teachers will hold its national convention in Philadelphia, October 8-11, 1969. The theme of the convention will be "Social Implications of Biological Education."

Physics Is Too For Girls, Floyd D. Goar

Iowa Science Teachers Journal

For several years there has been concern about the lack of girls in physics classes and, more recently, the lack of boys. The idea for an all-girl class has been in the back of my mind for some time because just watching the few girls in my physics classes each year gave me the impression that they weren't really enjoying themselves.

Nature Of The Antinatriuretic Action Of Growth Hormone, Ronald R. Bach

Iowa Science Teachers Journal

Three interrelated experiments were initiated to study growth hormone's stimulation of urinary sodium retention. First a dose-response curve was determined by administration of known dosages of growth hormone or the vehicle to groups of rats. Urine was collected from four to six hours after administration. In a second experiment, the relationship between time and degree of response to growth hormone was determined. Urine was collected from 0-2, 2-4, 4-6, 6-8, 8-10, 12-14, 16-18, and 20-22 hours after administration. Sodium excretion was not altered in the 0-2 hour collection period. Significant retention took place in both the 2-4 and 4-6 hour …

Complete Teaching Guides On Corrosion With Demonstration Materials

Iowa Science Teachers Journal

A solicitation for teaching guides on corrosion provided by the Zinc Institute, Inc.

Cognitive Capacity Of Very Young Children, Jacques Mehler, Thomas G. Bever

Iowa Science Teachers Journal

Children between 2 years, 6 months old and 3 years, 2 months old correctly discriminate the relative number of objects in two rows; between 3 years, 2 months and 4 years, 6 months they indicate a longer row with fewer objects to have "more"; after 4 years, 6 months they again discriminate correctly. The discriminative ability of the younger children shows that the logical capacity for cognitive operations exists earlier than previously acknowledged.

Cover - Ias & Ists Officers, Directors And Chairpersons - Ist Journal Information - Table Of Contents

Iowa Science Teachers Journal

No abstract provided.

Developing Physics Concepts Through The Process Of Variation, Walter J. Gohman

Iowa Science Teachers Journal

The present trend in the design of physics courses is to place emphasis on understanding rather than the rote memory of ideas and processes. The development of systematic approaches to direct thought patterns decreases the memory burden. The process of variation provides a universal thought pattern that can be applied in almost all phases of physics. This paper provides a brief description of some selected sample applications. It is hoped that these will illustrate the scope and the merit of this approach.

Preliminary Planning Session For Short Course

Iowa Science Teachers Journal

Preliminary plans for the Science Teachers' Short Course were discussed at a meeting at Iowa State University, Ames, on December 7, 1968.

Hatching Avian Eggs In The Laboratory, Kashmiri L. Arora

Iowa Science Teachers Journal

The purpose of this paper is to acquaint researchers and biology teachers with hatchability problems and incubation techniques. While the discussion is primarily devoted to the incubation and hatching of chicken embryos, most of the points will be applicable to other avian species.

Color Centers In Alkali Halides, Allan Holtz

Iowa Science Teachers Journal

The purpose of this investigation is to examine Schottky defects in alkali-halides. Although they occur in pairs, only the anion vacancies lend themselves to the trapping of electrons. Thus, this project concerns only the anion portion of the Schottky defects.

Open Letter To The Members Of Ists, George F. Chapman

Iowa Science Teachers Journal

This year we celebrate the twenty-fifth anniversary of the National Science Teachers Association. Time has seen many changes in science education in the nation and in Iowa. It is for this reason that the regional meetings of ISTS have as their theme "Twenty-five Years of Science Education-The Story of a Revolution."

Science, Engineering, Humanities Symposium Set

Iowa Science Teachers Journal

The seventh annual U.S. Army-Iowa Science, Engineering, and Humanities Symposium will be held at The University of Iowa, March 6, 7, and 8, under the direction of Dr. Ronald Townsend.

Nsf Reports On 1967 Industrial Research And Development

Iowa Science Teachers Journal

Research and development expenditures by industrial firms totaled $16.4 billion in 1967, up 6 per cent from the 1966 level by $15.5 billion, according to a bulletin released by the National Science Foundation.

The Ias Bulletin, V3n1, January 1969, Iowa Academy Of Science

IAS Bulletin

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In this issue:

--- Call for Papers
--- Visiting Scientist Program
--- Speakers' Bureau Directory
--- Special Committee Named
--- State-Wide Articulation Committee Appointed
--- Report fromthe ISTS Short Course Committee
--- Constitution Revision
--- Industrial Support Being Solicited
--- Special Bulletin Going Out to all High School Science Teachers
--- Membership Information
--- Academy Representatives Attend AAAS Convention
--- Proceedings for 1967 and 1968
--- Research Grants Awarded
--- New Section to Appear on the 1969 Program
--- Program Notes from Other Sections
--- Eighty-First Session at Cedar Falls
--- Call for Nominations for Teacher Awards
--- Selected …

Back Cover

Iowa Science Teachers Journal

No abstract provided.

Nsta 1969 Regional Conferences

Iowa Science Teachers Journal

A list of National Science Teachers Association 1969 conferences.

Cover - Ias & Ists Officers, Directors And Chairpersons - Ist Journal Information - Table Of Contents

Iowa Science Teachers Journal

No abstract provided.

Testing, 1, 2, 3, . . . . . . . 10, R. R. Haun

Iowa Science Teachers Journal

Teachers are constantly being reminded of the importance of making evaluations of student achievement. Evaluations should be made both for the measurement of the progress of the pupil and for determining the effectiveness of the teacher himself. Methods, tools, and techniques for making these evaluations are topics of common interest and continuous discussion in the teaching fraternity.

Statement By The Nsta President, Elizabeth A. Simendinger

Iowa Science Teachers Journal

Few people would doubt that advancements in science and technology have dominated the changes in this century, and likewise, few would doubt the need to equip the citizenry with an understanding of these changes.

Convention Plans Near Completion

Iowa Science Teachers Journal

Plans are nearing completion for the 1969 NSTA convention in Dallas, March 21-25. A tentative convention program has been compiled with confirmed arrangements for the majority of sessions, seminars, and workshops.

The Dual Crisis In Science And Society, Barry Commoner

Iowa Science Teachers Journal

Our present achievements in science and technology appear to contrast vividly with our present lack of achievement in solving social problems. We can nourish a man in the supreme isolation of outer space-but we cannot adequately feed the children of Calcutta or Harlem. We hope to analyze life on other planets-but we have not yet learned to understand our own neighbors. We are attempting to live on the moon-but we cannot yet live peacefully on our own planet.