scholarly journals A história da química por meio dos “ares”: uma contribuição experimental direcionada ao ensino de química

2020 ◽  
Vol 4 (4) ◽  
pp. 640-670
Author(s):  
Suelen Dos Santos Silva ◽  
Paula Marcelly Alves Machado ◽  
Wagner Da Silva Terra
Keyword(s):  
Historical Data ◽  
Low Cost ◽  
Lesson Plan ◽  
Traditional Model ◽  
Learning Potential ◽  
Chemistry Teaching ◽  
History Of Chemistry ◽  
Teaching Resources ◽  
History Of ◽  
Chemical Contents

Resumo: O Ensino de Química no Brasil nos dias atuais segue, predominantemente, um modelo tradicional, sendo verificada a utilização de metodologias pedagógicas repetitivas de baixo potencial de aprendizagem. Nesse contexto o presente trabalho teve por intuito elaborar um plano de aula diferenciado que envolvesse conteúdos químicos, dados históricos e discussões filosóficas a partir do tema “Ares”, utilizando a demonstração investigativa como recurso didático para propiciar uma maior motivação e envolvimento dos discentes. Para se alcançar o objetivo proposto, foi realizado um conjunto de quatro experimentos, utilizando materiais de baixo custo e fácil aquisição, a saber: Peso do flogisto; Síntese do Ar Fixo (CO2); Síntese do Ar Inflamável (H2); Síntese do Ar Desflogisticado (O2). A análise qualitativa dos dados obtidos demonstrou que o formato de aula utilizado é aplicável ao Ensino Médio, tornando a aula mais dinâmica, sendo, portanto, apreciada pela maior parte dos discentes, o que possibilitou uma maior motivação desses.Palavras-chave: Experimentação Demonstrativa; História da Química; Recursos no Ensino de Química. The history of chemistry through the “airs”: an experimental contribution to chemistry teachingAbstract: The Chemistry teaching in Brazil nowadays follows, predominantly, a traditional model, being verified the use of repetitive pedagogical methodologies with low learning potential. In this context, the present work aimed to elaborate a different lesson plan involving chemical contents, historical data and philosophical discussions based on the theme “Airs”, using investigative demonstration as a didactic resource to provide more motivation and involvement of students. To achieve the proposed goal, a set of four experiments was carried out, using low-cost and easy-to-acquire materials, namely: Weight of phlogiston; Synthesis of Fixed Air (CO2); Flammable Air Synthesis (H2); Synthesis of Dephlogisticated Air (O2). The qualitative analysis of the data obtained showed that the class format used is applicable to high school, making the class more dynamic, being, therefore, appreciated by most of the students, which enabling a greater motivation.Keywords: Demonstrative Experimentation; History of Chemistry; Chemistry Teaching Resources. 

scholarly journals VERHOVSKIY AND HIS METHODICAL HERITAGE: “СHEMICAL ALPHABET”

2013 ◽  
Vol 10 (3) ◽  
pp. 28-37
Author(s):  
Sergei Teleshov ◽  
Elena Teleshova
Keyword(s):  
Teaching Methods ◽  
Teaching Methodology ◽  
Learning Tools ◽  
Chemistry Teaching ◽  
History Of Chemistry ◽  
History Teaching ◽  
History Of ◽  
Form Design ◽  
Unique Experience ◽  
Chemical Experiment

This article plunges us into the history of chemistry teaching methods - one of the most interesting methodological sciences. This paper focuses on a methodical review of the most, perhaps, the famous Russian and productive practitioner. Vadim Verhovskiy known for his books and instruments created by him, and his famous «Techniques and methods of chemi-cal experiment». This article briefly describes the didactic activity of the largest Russian prac-titioner of the first half of the twentieth century. He was a leading expert in the theory and methodology of school chemical experiment. He also was the author of a workbook, school textbooks, books to read, various means of visibility: models and instruments. «Сhemical alphabet», which he created in 1927, allows students in visual form design formula of various classes of substances. This «Alphabet» and guidelines for it, made specifically for students can promptly be consciously formulas of substances and write the equations of chemical re-actions. His advice and experience, we can actively and usefully applied in working with con-temporary students. The unique experience should not be lost. It was to be hoped that the methodical heritage of V. Verhovskiy will be in demand also in the 21st century too. Key words: chemical alphabet, history teaching methodology, learning tools, Verhovskiy.

scholarly journals Science theatre in teaching and popularizing the history of chemistry: The case of a theatrical play on Nobel-laureate A.I. Virtanen

2013 ◽  
Vol 1 (4) ◽  
pp. 457-475
Author(s):  
Jan Jansson ◽  
Maija Aksela
Keyword(s):  
History Of Science ◽  
Nature Of Science ◽  
Good Method ◽  
Nobel Laureate ◽  
Chemistry Teaching ◽  
History Of Chemistry ◽  
School Teaching ◽  
History Of ◽  
Science Theatre

The article discusses the significance of science theatre and the role of nature of science in it, as well as the significance of history of chemistry, and different methods for popularizing it and using it in teaching. The study includes two surveys (N=45 and N=126) conducted among the audiences of “Virtanen!” play, performed in 2011. The data was analyzed using content analysis. Based on the results, the history of science was mainly portrayed through the life of the protagonist of the play, and the play showed the human side of science to the audience. In addition, from the viewpoint of nature of science, the play emphasized the role of social interaction in science as well as the interaction between science and the society. According to the audiences, national expertise in chemistry should be emphasized more in order to increase interest towards the subject and also to promote national self-esteem. It was suggested that history of chemistry should be presented through different methods, such as science theater, school teaching, exhibitions, and documentary films, in future. Also, it was hoped that history would be included in chemistry teaching together with other chemistry contents, through historical portraits of scientists, in collaboration with other school subjects or as a separate lesson on history of science. Science theatre was found to be a good method to teach history of chemistry and nature of science, and to popularize chemistry.

scholarly journals THE HISTORY OF CHEMISTRY AND PHARMACY DEVELOPMENT IN EARLY AND MEDIEVAL GEORGIA

2019 ◽  
Vol 16 (31) ◽  
pp. 784-790 ◽  
Author(s):  
Ketevan KUPATADZE
Keyword(s):  
Significant Role ◽  
Point Of View ◽  
Medieval Period ◽  
Chemistry Teaching ◽  
History Of Chemistry ◽  
Teaching Process ◽  
Good Basis ◽  
The Future ◽  
History Of

This article reviews chemistry and pharmacy development in the early and medieval period of Georgia. We will focus only on key directions. The presented information itself is important in historical point of view; however, we believe, that it plays an equally significant role in the chemistry teaching process as well. Linking different chemical issues to the history of its discovery or development kindles additional interest and disposition in students. Once the mood is created, it never fades away and in the future, a good basis is ensured for comprehensive learning of the topic.

LOOK AT MEDICINE ATTENTION: PROBLEMS AND SOLUTIONS

2019 ◽  
Vol 24 (2) ◽  
pp. 69-75
Author(s):  
Absalom Khuzhanazarov ◽  
◽  
Shukhrat Allamuratov
Keyword(s):  
History Of Medicine ◽  
Historical Data ◽  
Attention Problems ◽  
Medical Field ◽  
Problems And Solutions ◽  
History Of ◽  
Country Analysis

This article presents historical data and scientific conclusions regarding the history of medicine in our country. Analysis of current problems in the medical field as a result of the reforms implemented over the last three years.

On the nature of chemistry

2018 ◽  
Vol 10 (2) ◽  
pp. 74 ◽  
Author(s):  
Eric R. Scerri
Keyword(s):  
19Th Century ◽  
The Other ◽  
Recent History ◽  
History Of Chemistry ◽  
History Of ◽  
The One ◽  
Fundamental Unity ◽  
The 19Th Century

<span>The very nature of chemistry presents us with a tension. A tension between the exhilaration of diversity of substances and forms on the one hand and the safety of fundamental unity on the other. Even just the recent history of chemistry has been al1 about this tension, from the debates about Prout's hypothesis as to whether there is a primary matter in the 19th century to the more recent speculations as to whether computers will enable us to virtually dispense with experimental chemistry.</span>

Bonobos

2018 ◽  
Keyword(s):  
19Th Century ◽  
Historical Data ◽  
Line Drawings ◽  
History Of ◽  
The 19Th Century ◽  
First Time

This is a comprehensive, illustrated catalogue of the 200+ marine chronometers in the collections of Royal Museums Greenwich. Every chronometer has been completely dismantled, studied and recorded, and illustrations include especially commissioned line drawings as well as photographs. The collection is also used to illustrate a newly researched and up-to-date chapter describing the history of the marine chronometer, so the book is much more than simply a catalogue. The history chapter naturally includes the story of John Harrison’s pioneering work in creating the first practical marine timekeepers, all four of which are included in the catalogue, newly photographed and described in minute detail for the first time. In fact full technical and historical data are provided for all of the marine chronometers in the collection, to an extent never before attempted, including biographical details of every maker represented. A chapter describes how the 19th century English chronometer was manufactured, and another provides comprehensive and logically arranged information on how to assess and date a given marine chronometer, something collectors and dealers find particularly difficult. For further help in identification of chronometers, appendices include a pictorial record of the number punches used by specific makers to number their movements, and the maker’s punches used by the rough movement makers. There is also a close-up pictorial guide to the various compensation balances used in chronometers in the collection, a technical Glossary of terms used in the catalogue text and a concordance of the various inventory numbers used in the collection over the years.

Economic Consequences of War

1943 ◽  
Vol 3 (S1) ◽  
pp. 1-8
Author(s):  
Curtis P. Nettels
Keyword(s):  
Low Cost ◽  
Economic Consequences ◽  
Competitive Advantages ◽  
Competitive Position ◽  
The Past ◽  
History Of ◽  
Costs Of Production ◽  
Foreign Competitors

One influence of war has repeatedly asserted itself in the past—an effect on the costs of production and on the competitive position of the industries and firms of victorious or neutral nations. This subject needs more study, but certain facts suggest a hypothesis, of three parts. First: war expands some industries or concerns, increases their efficiency, enables them to operate, at the end of the struggle, on a comparatively low-cost basis, intensifies their competitive advantages, and improves their position in relation to foreign competitors. Second: war—for the duration—bolsters up some high-cost units by enabling them to sell at a profit all they can produce. The end of the war places such high-cost units at a disadvantage in the process of absorbing the shocks of the transition to a peacetime economy. Third: the history of postwar periods usually exhibits a sharp contest between such low-cost and high-cost enterprises. While “low cost” and “high cost” may refer to the relative positions of units within the same country, in most of this discussion, the terms will be applied to the producers of one country (either victor or neutral) to mean that their costs are low or high in comparison with those of their foreign competitors.

scholarly journals Astronomical phenomena in Dresden codex

2013 ◽  
pp. 53-64
Author(s):  
V. Böhm ◽  
B. Böhm ◽  
J. Klokocník ◽  
J. Vondrák ◽  
J. Kostelecký
Keyword(s):  
Historical Data ◽  
Large Uncertainty ◽  
Astronomical Data ◽  
Julian Date ◽  
History Of ◽  
Solar Eclipses ◽  
Dresden Codex ◽  
The Relationship

The relationship between Maya and our calendar is expressed by a coefficient known as ?correlation? which is a number of days that we have to add to the Mayan Long Count date to get Julian Date used in astronomy. There is surprisingly large uncertainty in the value of the correlation, yielding a shift between both calendars (and thus between the history of Maya and of our world) to typically several hundred years. There are more than 50 diverse values of the correlation, some of them derived from historical, other by astronomical data. We test here (among others) the well established Goodman-Mart?nez-Thompson correlation (GMT), based on historical data, and the B?hms? one (B&B), based on astronomical data decoded from the Dresden Codex (DC); this correlation differs by about +104 years from the GMT. In our previous works we used several astronomical phenomena as recorded in the DC for a check. We clearly demonstrated that (i) the GMT was not capable to predict these phenomena that really happened in nature and (ii) that the GMT predicts them on the days when they did not occur. The phenomena used till now in the test are, however, short-periodic and the test then may suffer from ambiguity. Therefore, we add long-periodic astronomical phenomena, decoded successfully from the DC, to the testing. These are (i) a synchrony of Venusian heliacal risings with the solar eclipses, (ii) a synchrony of Venus and Mars conjunctions with the eclipses, (iii) conjunctions of Jupiter and Saturn repeated in a rare way, and (iv) a synchrony of synodic and sideric periods of Mercury with the tropical year. Based on our analysis, we find that the B&B correlation yields the best agreement with the astronomical phenomena observed by the Maya. Therefore we recommend to reject the GMT and support the B&B correlation.

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