• 한국지구과학회지
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• 제32권5호
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• pp.437-452
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• 2011

The Steptoean Positive Carbon Isotope Excursion (SPICE) is found in the Machari Formation which was interpreted to have been deposited on the middle to outer carbonate ramp environment. The Machari Formation is the Middle to Late Cambrian in age and distributed in the Yeongweol area, Gangweon Province, Korea. The SPICE event in the Machari Formation begins with the first appearance datum of trilobite Glyptagnostus reticulatus and ends with the first appearance of datum of trilobite Irvingella. The SPICE is found in approximately 120 m thick sequence and ${\delta}^{13}C$ values in the SPICE interval range from 0.6 to 4.4‰. The SPICE in the Machari Formation is interpreted to be caused by burial of organic matter in the sea floor and subsequent increase of $^{13}C$ isotope of the Late Cambrian ocean. The SPICE interval in the Machari Formation corresponds to the highstand to transgressive systems tracts.

• 한국지구과학회지
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• 제28권1호
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• pp.24-34
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• 2007

이 연구의 목적은 9학년 학생들의 학습 양식과 과학에 대한 태도에 따라 한자기반 지구과학용어에 대한 이해 수준을 알아보는데 있다 연구 목적을 위해, 과학과 성취수준이 중간 순위 학생 8명을 선발하였으며, 이들을 시각적 학습자이자 과학에 대해 높은 태도를 가진 학생, 시각적 학습자이자 과학에 대하여 낮은 태도를 가진 학생, 언어적 학습자이자 과학에 대해 높은 태도를 가진 학생, 언어적 학습자이자 과학에 대해 낮은 태도를 가진 학생 그룹으로 분류하였다. 이들의 한자기반 과학용어에 대한 이해수준을 확인하기 위해 한글 표기형, 그림 표현형, 한자 음 훈 병행 표기형의 형태로 세 가지 형태의 질문지가 개발되었다. 이 질문지들로 9학년 학생들의 응답 자료를 수집한 결과, 학습 양식에 따른 차이는 없었으며, 한글 표기형이나 그림 표현형 보다는 한자 음 훈 병행 표기형에서 높은 이해수준을 보였다 따라서 중학생들에게 한자기반 과학용어를 제시할 때 한자의 음과 훈을 동시에 제공한다면 학생들의 과학용어 이해에 효과적일 것이다.

• 대한지구과학교육학회지
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• 제8권3호
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• pp.267-280
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• 2015

The purpose of this study is to identify the conceptions of middle school students and teachers about Visible-Light, Ultra-Violet(UV) and Infrared-Ray(IR). We administered questionnaire 3 teacher and 102 students(48 people of middle school 2nd students and 54 people of middle school 3rd students) who learned by 3 teachers in seoul. From the analysis, it was found that many students and teachers didn't understand the basic principle of UV and IR. Significant number of students belive that it is possible to see objects the absence of visible light. Most students belive that they can see objects in the presence of UV light alone. They think that "Light" is single concept. Teachers were generally more aware of the origin and explanation of UV. But teachers expressed some uncertainties. They tend to think negative effect for UV.

• 대한지구과학교육학회지
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• 제2권1호
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• pp.41-47
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• 2009

This study examined the difference for the ability of self-directed learning and information literacy(the ability to use information) between small group-cooperative instruction of ICT practical environment and explanatory instruction using ICT of general classroom in middle school science education. The 138 students(7th grade) participated in this study were classified in two group, experimental group(68) and controlled group(70). Experimental small group consisted of 5-6 students who had different levels and the ability of each the group was equal. The teaching of experimental group was made in the science lab which was equipped with computers to connect super high-speed Internet. The teaching of control group was made in general classroom. Under these two environment, this study was executed during 10 weeks. As the result, Small group-cooperative learning using ICT was more effective in diminishing the gap of information literacy in middle school students. And in the ability of self-directed learning, the small group learning using ICT was also more effective than general classroom instruction.

• 한국지구과학회지
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• 제43권4호
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• pp.520-531
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• 2022

The Yellow Sea experienced glacio-eustasy sea-level fluctuations during the Quaternary period. In the middle part of the Yellow Sea, the Quaternary successions were accumulated by alternating terrestrial, paralic, and shallow marine deposits that reflected the fluctuating sea levels. A long core of 69.2 m was acquired at the YMGR-102 site (33°50.1782'N and 123°48.3019'E) at a depth of 72.5 m in the middle of the Yellow Sea. A four-layered geoacoustic model was reconstructed for the sedimentary succession. It was based on seismic characteristics from 3.5 kHz SBP and air-gun seismic profiles and 96 grain-size properties in the core sample from YMGR-102. For the underwater simulation and experiments, the in-situ P-wave speeds were calculated using the sound speed ratio of the Hamilton method. The geoacoustic model of YMGR-102 can contribute to the reconstruction of geoacoustic models, reflecting the vertical and lateral variability of the acoustic properties in the continental shelf of the middle Yellow Sea.

• 한국지구과학회지
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• 제25권7호
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• pp.545-557
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• 2004

본 연구는 중학생들의 계절의 변화에 관한 선개념의 유형을 파악하고 멀티미디어 학습 자료를 개발하여 그 수업이 계절의 변화에 대한 개념에 어떠한 변화를 주는지 알아보는데 목적이 있다. 계절의 변화 개념을 알아보기 위한 검사지는 10문항을 개발하였다. 대상자는 중학교 3학년 80명(실험반 57명, 통계반 23명)으로 2차시에 걸친 수업을 실시하였다. 실험반에는 멀티미디어 활용수업이 투여된 반면 통제반에는 전통적인 수업이 투여되었다. 그 결과, 본 연구에서 활용된 멀티미디어 자료는 학생들의 개념변화에 효과가 있음을 보였다.(p$<$0.01). 또한, 개념의 변화를 상세히 알아보기 위하여 6단계로 분류하여 분석한 결과, 멀티미디어 활용수업은 전통적 수업모형에 비하여 개념이 없는 학습자의 과학적 개념을 형성하거나, 비과학적 개념을 과학적 개념으로 발전시키는데 효과적일 뿐만 아니라 과학적 개념을 더욱 더 정교화 시키는데도 효과적이었다.

• 한국지구과학회지
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• 제27권4호
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• pp.364-373
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• 2006

이 연구의 목적은 중학교 초임 과학 교사들의 실험수업을 관찰하여 실험 수업에 참여한 교사들의 탐구 수준을 알아보는데 있다. 신규 임용된 교사를 대상으로 전화 면접을 통해서 8명을 선발한 후, 구두 면담을 통하여 최종적으로 4명이 선정되었다. 실험 주제는 학생들의 조작적 활동이 많은 내용으로 교과서에 있는 실험으로 연구자가 제시하였으며, 수업 기술 발달 분석을 목적으로 1년 후에 같은 주제로 수업을 하였다. 이러한 과정을 통하여 알아낸 참여 교사들의 탐구 수준은 확인 탐구 수준 또는 구조화된 탐구 수준으로 나타났으며, 1년 후에 조사한 참여 교사들의 탐구 점수가 범주별로 약간 증가하기는 하였지만 여전히 확인 탐구 수준과 구조화된 탐구 수준을 벗어나지 못하였다. 이 연구는 초임 과학 교사들의 수업 발달에 대한 기초 연구와 실험 수업을 개선하는데 이바지 할 것이다.

• 대한지구과학교육학회지
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• 제2권1호
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• pp.48-54
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• 2009

This study aims to find out any effect of a POE model in the earth science unit of middle school(POE: prediction-observation-explanation). So this report compared and analyzed the effect that POE class and teacher-oriented class have on the level of learner science process skill and science academic achievement. Two groups, which were composed of 66 students and 64 students of middle school 2rd grade in Gyeongsangnamdo for this study, respectively, were selected as an experimental group and a comparative group. Through the pretest, the level of learner science process skill and science academic achievement were investigated. And learner science process skill and science academic achievement was verified with t-test. The findings of the study are as follows: First, as a result of analyzing the pre-test and the post-test for finding out the effect of class offering the POE model on learner science process skill, the class offering the POE model was shown effective for improving learner science process skill. However, the POE class was found significantly effective for improving the sub-factors of operationally defining, designing investigations, graphing and interpreting data, but not effective for identifying and stating hypothesis, identifying variables. Second, as a result of analyzing the pre-test and the post-test for finding out the effect of class offering the POE model on learner science academic achievement the class offering the POE model was shown effective for learner science academic achievement.

• 한국생활과학회지
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• 제10권4호
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• pp.421-428
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• 2001

The purpose of this study is to tender as the basic data for practice of environment on the consciousness and practice of life environment on technical teacher in middle school and colleage students. For this purpose, the data were collected by using questionnaire distributed to 102 technical teacher in middle school and 103 male colleage students in Jan. and Aug., 2000. The major findings of this research are as follows; 1. It was found that the teachers had consciousness in industrial environment pollution but the students has the causes of house or car. All of the subjects set to the environment information through T.V. programs and the efficacy is highest. Also the teachers set to the environment information through environmental organization and books. The teachers had concern of high level and higher than the students on the life environment. Specially the awareness of life environment was upper to the average and higher than students. 2. The assessments of the earth life environment was 69.17(M), the oceanic environment was highest and water environment was lower. The assessments of the Korea life environment was 60.67(M) were lower than the assessments of the earth life environment, all items were lower than earth lie environment. Generally leachers has positive assessments to earth and Korea life environment than male students. 3. The teachers have high practice apparence on the life environment than the students. Also the teachers had upper to the average on the practice degree, and the practice degree lower than practice awarences. But all items on practices degree was higher than student's.

• 한국과학교육학회지
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• 제29권7호
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• pp.759-766
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• 2009

This study was conducted to examine 10 Belizean teachers' conceptions about the causes of seasonal change. This research was conducted with an integrated method using a open ended written test and an interview which included a drawing. There are four categories, explained by the teachers, as the causes of seasonal changes. They are; climate, rotation of the earth on its axis, revolution of the earth around the sun, and the tilting of earth's axis as it revolves. Most teachers misunderstood that the first of three categories was responsible for seasonal change. Second, it is more effective to use the integrated method shown in this research than to use only a written test when seriously investigating the causes and understanding of seasonal change. Third, 8 out of 10 teachers could not correctly explain the causes of seasonal change. The reasons for seasonal change seemed to be hard for the informants to understand even though it was taught in elementary, middle, high school, and college elective classes.