• 한국초등과학교육학회지:초등과학교육
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• 제22권2호
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• pp.200-210
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• 2003

This study is focused to characteristics of earth region vocabularies used in 7th curricula science textbooks for 3rd to 6th grades of elementary school. The numbers of earth region vocabularies are generally increased from the lower to the higher grade textbooks, ‘science’ and ‘experiments and observation’. In ‘science’ textbooks, numbers and use frequencies of earth region vocabularies are predominant in astronomy and atmospheric science vocabularies. Meanwhile, in ‘experiment and observation’, domains related with astronomy have relatively more numbers of the vocabularies but domains related with geology have higher use frequencies of those vocabularies relative to domains related with another areas. ‘Strata’ and ‘fossil’ of geology vocabularies, ‘air temperature’ of atmospheric science vocabularies and ‘sun’ and ‘planet’ of astronomy vocabularies are commonly the highest frequent in the use for science textbooks and experiment and observation. In the both books, earth region vocabularies are derived from 70% to 80% words of Chinese, below 10% of pure Korean, and rest of other languages. Additionally, cases of pure Korean vocabularies unpacked from professional nomenclatures, ones without previous explanations and multiple vocabulary applications to same phenomena are observed in the both books. Synthesizing above results, it is suggested that the reconsideration of domains related with each area of earth science and vocabulary uses assigned to above cases is necessary, in possible.

• 대한지구과학교육학회지
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• 제5권1호
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• pp.88-94
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• 2012

This study was created to resolve the problems embedded in the formal measuring experiments to determine the earth's size in the current curriculum, to develop an updated measuring experiment to determine the earth's size and to establish its effect. For this study, pre-service elementary teachers, who had attempted the experiment of measuring the size of the earth when they were in middle school, performed the experiments in the existing national curriculum, and their responses, collected through in-depth interviews, were examined. To begin with, the pre-service elementary teachers conducted the experiment of measuring the earth size and they recorded the problems while performing it. At the end, an in-depth interview was administered. Based on the problems, an updated measuring experiment to determine the earth's size was suggested to be applied to the same contents and be analyzed through the in-depth interviews. Common themes which were mutually categorized and analyzed by the two researchers were obtained based on the records produced while conducting the experiment and the in-depth interview data. The teachers mentioned that the experiments for measuring the size of the earth in the current curriculum gave rise to difficulties in measuring precisely the angles between the string and the post. Also, there has been a scientific contradiction that solar altitudes were increased in a high latitude region, instead of decreased. For this reason, an alternative method has been developed to measure the earth's size using the distance and the solar altitude difference of two places. The teachers all agreed that by using the updated measuring experiment, they can acquire more precise measurements and it is easier, faster and consequently more effective than the existing methods. Through the results of this study, I suggest that the newly developed experiment by the researchers can overhaul the problems of the current experiments and it can be an effective alternative to the current experiment.

• 대한지구과학교육학회지
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• 제13권3호
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• pp.297-304
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• 2020

이 연구의 목적은 지구의 공전 실험에 대해 알아보고, 학교 급별로 효과적인 지구의 공전 실험이 무엇인지 알아보는데 있다. 연구자는 지구의 공전을 학습할 수 있는 8가지의 실험 방법을 조사 또는 개발하였다. 초등 예비교사 26명에게 이 실험을 실시하고 토의하도록 한 후, 학교 급별로 효과적인 지구의 공전 실험을 선택하고 이유를 쓰도록 하였다. 그 결과 초등학교에서는 계절별 별자리가 달라지는 실험, 중·고등학교에서는 계절별 별의 스펙트럼을 비교하는 실험, 대학교에서 외행성의 역행운동이 효과적이라고 선택하였다. 예비교사는 직접 체험의 가능 여부, 교과 내용과 연계되는 정도, 배경지식과 고차원적인 사고의 정도를 실험 선택의 이유로 제시하였다.

• 한국지구과학회지
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• 제31권2호
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• pp.185-204
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• 2010

지구과학 탐구 대상은 다른 학문의 탐구 대상과 달리 거대한 시 공간적 규모, 접근 불가능성, 통제 불가능성, 복잡성 등을 지니고 있다. 그렇기 때문에 지구과학의 탐구 대상을 실험실 내에서 실제 조작을 통해 탐구하는 것은 매우 어렵거나 심지어 불가능하다. 따라서 지구과학에서는 실제 조작을 하지 않고도 탐구를 할 수 있는 대안이 필요하다. 실제 조작을 하지 않고 탐구를 수행하는 대표적인 탐구인 사고실험으로부터 추론의 역할을 재조명하고 추론을 사용한기존의 탐구 수업 모형들의 특징을 조사하였다. 각 탐구 모형들을 지구과학에 적용하는데 있어서의 시사점을 살펴보고 이들을 바탕으로 지구과학적 현상의 탐구에 적합한 추론 중심 탐구수업 모형을 제안한다.

• Asian-Australasian Journal of Animal Sciences
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• 제23권8호
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• pp.1057-1065
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• 2010

Two experiments were conducted to compare the effects of feeding a newly-developed rare earth mineral-yeast product, zinc oxide (ZnO) or antibiotics on the performance, nutrient digestibility and serum parameters of weanling pigs. In experiment 1, 150 crossbred barrows (24 d old and 6.28 kg BW) were fed one of five dietary treatments consisting of an unsupplemented basal diet or the basal diet supplemented with antibiotics (33 ppm tiamulin and 100 ppm chlortetracycline), ZnO (1,500 or 2,500 ppm) or 0.1% peptide-bound rare earth mineral-yeast. In experiment 2, 576 crossbred barrows (28 d old and 7.20 kg BW) were fed the same diets as those used in experiment 1 modified only by the addition of 1.0% Celite 545 to all diets as a digestibility marker. However, the negative control was not included. In experiment 1, weight gain was significantly lower (p<0.05) for pigs fed the negative control than for pigs fed diets supplemented with antibiotics, ZnO, or rare earth mineral-yeast. Pig performance did not differ between pigs fed the four supplemented diets. In experiment 2, there were no differences in performance between pigs fed diets supplemented with antibiotic, ZnO or rare earth mineral-yeast. The digestibility of dry matter, crude protein, calcium, phosphorus and energy were significantly (p<0.01) higher on the rare earth mineral-yeast diet than on diets supplemented with ZnO. In addition, pigs fed the diet supplemented with rare earth mineral-yeast had significantly (p<0.05) higher digestibility of histidine, lysine, threonine and valine than pigs fed the ZnO supplemented diets. Digestibility coefficients for pigs fed antibiotics tended to be intermediate to those of pigs fed rare earth mineralyeast or ZnO. In conclusion, the performance of pigs fed rare earth mineral-yeast was basically equal to that of pigs fed antibiotics or ZnO indicating that rare earth mineral-yeast can be successfully used as a growth promoter in diets fed to nursery pigs. The effects of rare earth mineral-yeast appeared to be mediated through improvements in nutrient digestibility.

• 한국과학교육학회지
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• 제33권3호
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• pp.639-649
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• 2013

The purpose of this study is to figure out how teachers conduct an experiment in measuring the size of the Earth and how students recognize it. For this study, an in-depth interview was conducted one week after the lesson on the experiment about measuring the size of the Earth. The participants were five secondary school teachers and five secondary school students. The in-depth interview was recorded and transcribed. The result of the interview was drawn through an inductive categorized analysis method. As a conclusion of this study, the teachers taught the students the lesson using alternate angles instead of using the altitude of the Sun. Their lessons were based on Eratosthene's story or some related illustrations suggested in the textbook and not based on an explanation of the principle. Also, students measured the Earth's size only by using alternate angles and didn't understand the meaning of the shadow in the experiment. The results of this study show that teachers need to reconstruct the textbook and understand the accurate experimental principle for the students to have a meaningful experience of the experiment on measuring the size of the Earth.

• 대한지구과학교육학회지
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• 제4권1호
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• pp.12-19
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• 2011

This study aimed to analyze the teachers' cognitions about the primary science textbooks(experiment and observation) used in elementary schools. This study surveyed 211 teachers in Seoul and Gyeonggi province. The data were statistically analyzed by SPSS WIN 10.0. The results of this study are as follows : Most of the teachers showed positive opinions on the directions of the compilation of experiment and observation textbook. Teachers used experiment and observation textbook as summary notes, experiment reports and evaluating methods. The experiment and observation textbooks should be compiled and reorganized in order as follows : Lesson introduction, inquiry activities, and intensive and supplementary activities which are followed by space of description in experiment and observation textbook.

• 대한지구과학교육학회지
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• 제11권2호
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• pp.107-115
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• 2018

지구의 모양을 아는 것은 지구과학 교육에서 중요한 성취기준이다. 이 연구의 목적은 학교 급별로 효과적인 지구의 모양 실험을 조사하여 학교 탐구실험에 도움을 주고자하는데 있다. 이를 위해 연구자는 지구의 모양을 학습하기 위한 다양한 실험 방법을 제시하고, 예비교사 26명에게 초등학교, 중 고등학교, 대학교 학생들에게 적절한 실험이 무엇인지 조사하였다. 그 결과 효과적인 지구의 모양 실험에 있어서 학교 급별로 차이가 있었다. 예비교사는 초등학생들에게는 '항구로 돌아오는 배의 돛 관찰하기 실험이 효과적일 것으로 생각하고 있었다. 그리고 중 고등학교 학생들에게는 지구의 위도에 따른 북극성 고도 비교하기 실험, 대학교 학생들에게는 지면의 높이에 따른 시야의 차이 비교하기 실험이 효과적일 것이라고 응답하였다. 예비교사는 학교 급별 효과적인 지구의 모양 실험을 선택할 때에는 실험 방법의 난이도, 추상적인 사고와 배경지식의 깊이 등이 고려되어야 한다고 생각하였다.

• 한국과학교육학회지
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• 제10권2호
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• pp.55-66
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• 1990

This study aimed at identifying the characteristics of current Earth Science Curricula in several countries in terms of their format, objectives and contents and discussing about them. The curricula(including textbooks) were collected from 6 countries The United States of America, England, Australia, Japan and The Republic of China. Here are the results of this study ; 1. Earth Science should be teached in high school and assigned at least 8-10 unit. 2. In Earth Science objectives, scientific inquiry methods through observation and experiment and mutual relationship among science, technology and society must be stressed. 3. The contents of Earth Science must did with experimental and activity rather than understanding in order to induce students to how more intersts in Earth Science. 4. There is a growing tendency for Earth Science Education to be attached importance to life environment and career education.

• 대한지구과학교육학회지
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• 제17권2호
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• pp.102-122
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• 2024

연구의 목적은 지구과학교육의 주요한 대상인 자연이 가지고 있는 특성으로, 그것의 외재적 유용성인 도구적 가치를 넘어선, 그 자체의 내재적 가치에 어떻게 접근하는가를 탐색하는 것이다. 무엇보다도 심리적 요소들이 포함된 실험 전체 전이과정에서 활동적 고유한 가치(Activity-based inherent value) 라고 하였다. 환경윤리의 핵심에는 가치, 그리고 무엇이 지속할 만한 가치가 있는지에 대한 공리적 질문이다. 그것은 단순히 지속을 넘어선 문제이다. 그 해답은 지속적인 자연환경의 가치로, 내재적인 가치, 즉 생명 애호가로서 유산가치(Leopold의 생명공동체의 건강함을 표현하는, 통일성, 안전성, 아름다움 등) 로, 특히 아름다움을 보전해야 하는 교육이다. 나아가 내재적 가치 대신 지속 가능한 가치로 가치평가 영역을 공시적 차원에서 통시적 차원인 윤리적 가치로 격상시켜야한다. 환경윤리학에서는 지식 자체의 아름다움을 보여주는 내재적 가치를 유산가치(bequest value)라고 한다. 연구는, 기존의 경험을 무시하는 선험적인 내재적 가치와, 경험 중심의 활동 중심적 고유한 가치를 구분하였다. 또한 지구과학교육에서 과학적 실험으로, Eratosthenes의 지구크기측정 실험으로 활동 중심의 고유한 가치원리를 탐색하였다. 과학적 세계관에 따른 가치원리는 가치판단의 근거가 된다. 무엇보다도 실험결과를 추론하는 과정에서 미적 가치가 개입되는 실험의 활동적 가치 체험을 통하여, 내재적 가치가 발현되고 있었다. 교육적 시사점으로 우리가 지속가능한 사회와 자연을 만들어가는 근간이 되는 도구적 가치보다는 고유한 가치를 내면적으로 전이 될 수 있도록 돕는 가치-교육이 되어야한다.