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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean earth science society
Journal Basic Information
Journal DOI :
The Korean Earth Science Society
Editor in Chief :
Volume & Issues
Volume 24, Issue 8 - Dec 2003
Volume 24, Issue 7 - Dec 2003
Volume 24, Issue 6 - Oct 2003
Volume 24, Issue 5 - Aug 2003
Volume 24, Issue 4 - Jun 2003
Volume 24, Issue 3 - Apr 2003
Volume 24, Issue 2 - Feb 2003
Volume 24, Issue 1 - Jan 2003
Selecting the target year
Nature and Development of Pedagogical Content Knowledge in Science Teaching
Lim, Cheong-Hwan ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 235~249
The purpose of this study is to analyze and evaluate the nature, role and development of pedagogical content knowledge in science teaching. Two research questions were considered: 1) What are the nature and the components of the pedagogical content knowledge in science teaching? 2) What is the value of pedagogical content knowledge and are there any routes and paths to developing pedagogical content knowledge for science teachers? In order to answer these questions instead of analyzing empirical data, former research literatures are reviewed. The results indicate that science pedagogical content knowledge is a special amalgam of science content knowledge and science method knowledge in a special context of science teaching that is uniquely the province of teacher based on their own special form of professional understanding. As a part of one's own distinctive bodies of knowledge, science teachers' pedagogical content knowledge is an important basis for professional development and competent teachers. It is knowledge of how to teach specific content in specific contexts, also it depends on each teachers' distinctive knowledge structure. Pedagogical content knowledge for science teaching is composed of five components: orientations toward science teaching, knowledge and beliefs about science curriculum, knowledge and beliefs about students' understanding of specific topics, knowledge and beliefs about assessment for teaching science, knowledge and beliefs about instructional strategies for teaching science. The development of science pedagogical content knowledge does not start until teachers have acquired a deeply principled conceptual knowledge of content, also it is promoted by the constant use of subject matter knowledge in teaching situations.
Role and Process of Abduction in Elementary School Students' Generation of Hypotheses concerning Vapor Condensation
Shim, Hae-Sook ; Jeong, Jin-Su ; Park, Kuk-Tae ; Kwon, Yong-Ju ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 250~257
The purpose of this study was to test the hypotheses that student's abductive reasoning ability plays an important role in hypothesis-generating about vapor condensation, and student's hypothesis-generating requires their causal explicans as well as experience. To test the hypotheses, the instruments of hypothesis-generation, prior knowledge, and experience with vapor condensation were developed and administered to 6th grade students. This study found that 72 subjects among 89 students who had prior knowledge about vapor condensation failed to apply their prior knowledge to hypothesis-generating about the vapor condensation. This result showed that the students' failure in hypothesis-generating was related to their deficiency in abductive reasoning ability. In addition, this study showed that 54 subjects among 56 students who had experience with vapor condensation also failed to generate hypotheses. This result supported that student's causal explanations were separated from their experience. Therefore, this study suggests that science education should include the teaching of abductive reasoning skills for developing student's hypothesis-generating skills.
Science Teaching Practice and Science Teaching Efficacy Beliefs by Development of Elementary School Teachers' Pedagogical Content Knowledge
Lim, Cheong-Hwan ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 258~272
This study explored the effectiveness of science teaching practice and science teaching efficacy beliefs by development of elementary school teachers' pedagogical content knowledge. Three research questions are formulated: 1) Is there any relationship between the development of teachers' pedagogical content knowledge and the science teaching efficacy beliefs? 2) How does the development of teachers' pedagogical content knowledge affect the science teaching practice? 3) How do the science teaching efficacy beliefs affect the science teaching practice? 120 subjects were chosen in 53 public elementary schools. Quantitative and qualitative data were collected and analyzed to triangulate the results. Results indicate that the development of teachers' pedagogical content knowledge and science teaching efficacy beliefs are more developed in accordance with teachers' teaching career and academic career are increased. There are significant relationships between teachers' science pedagogical content knowledge and science teaching efficacy beliefs. The more the teachers' pedagogical content knowledge, the more confident in science teaching practice. The more the science teaching efficacy beliefs, the more confident in science teaching practice. Also these teachers tried to present teaching objectives and learning problems in the beginning stages of science lessons, and they tried to review each learning stage.
The Environmental Perceptions of Pre-service Secondary School Teachers about the Global Environment
Cheong, Cheol ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 273~280
The purpose of this study is to investigate the environmental perceptions of pre-service secondary school teachers about the global environment. The Subjects are 133 pre-service secondary school teachers. As an indicator of environmental perceptions, the modified New Environmental Paradigm (NEP) instrument was used. This modified NEP instrument consists of four dimensions: the negative results of growth and technology, relation of humankind and nature, quality of life, and limits of biosphere. The results of this study suggested that a majority of pre-service secondary teachers held ecological environmental perceptions. They also had a similar environmental perception to education major. However, there were significant differences in environmental perceptions and the variables of education experience on environment-related subjects. Based on the findings of this study, it is recommended that environment-related subjects. Based on the findings of this study, it is recommended that environmental education be a mandatory course in education programs.
Investigation of Exhibit Characteristics at Natural History Museums
Shin, Myeong-Kyeong ; Lee, Chang-Zin ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 281~289
The purpose of this study is to isolate characteristics of exhibits particularly considering educational perspectives and effectiveness in attracting the attention of visitors in famous Natural History Museums. The target exhibits were selected from the Natural History museum in London, the Australian Museum in Sydney, the American Museum of Natural History in New York, and the Smithsonian Museum in Washington D.C. A total of 107 sample exhibits used in this study from these four museums were selected as representative solid earth science education related exhibitions including fossils, geological history, and minerals. For the investigation, this study developed a checklist with seven items based on reviewing previous literature and articles pertaining to exhibit characteristics of natural history museums and science centers. Also the educational perspectives focused on classifications of exhibitions by Hein (1997). In this study, all the sample exhibit, were taken pictures of and stored on slide films for lated examination. Respectively exciting and positive results were found in all four museums. The analyses, however, indicated weaknesses as well as strengths in the four museum exhibits.
Geochemical Characteristics of Stream Sediments and Waters around the Pungam Landfill in Gwangju City, Korea
Park, Cheon-Young ; Shim, In-Hyun ; Bae, Jong-Phill ; Ahn, Kun-Sang ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 290~302
This study was carried out to evaluate geochemical properties for stream sediments, surrounding soils, sludge collected in the drainage pipe of leachate and waters (stream water, groundwater, leachate) around the Pungam Landfill in Gwangju city. The stream sediments don't show any systematic trend of contents from upstream to downstream. The most enriched major element in the stream sediments is Fe (up to 7.08wt.% in GJ-23). Though stream sediment GJ-23 and GJ-34 were enriched by some heavy metals (eg. As, Cu, Zn), they do not constitute serious problems for environment consideration. The concentration of Fe (35.lwt.%) and As (38ppm) are significantly high in the GJ-8, which is soil specimen adjacent to leachate reservoir. The sludge (GJ-7) shows very high concentrations of As, Mn, Cr, Pb. In particular, the Cr content is 45.6 ppm, which exceeds the permitted level. The leachate is characterized by high TDS (2210-2470mg/L) and high electric conductivity (468, 530ms/cm), and enriched in both cation (Na, K) and anion (HCO
). The leachate(PK-3) had a relatively high concentration of Cl, and is plotted in Na-Cl type on the Piper's diagram. The NO
-N of the groundwater and stream water exceeded the permitted levels for drinking water.
Analysis of a Sea Fog Using Ocean-air Observation Data in the Mid-Yellow Sea off Korea
Oh, Hee-Jin ; Lee, Ho-Man ; Seo, Tae-Gun ; Youn, Yong-Hoon ; Kim, Tae-Hee ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 303~314
Ocean-air observation using an Automatic Weather Station (AWS) and Conductivity Temperature Depth (CTD) was conducted in the Mid-Yellow Sea off Korea during 8-10 July 2002. A water mass lower than 17
around the Taean peninsula and a tidal front between 36
20'N and 36
30'N were observed. The horizontal distribution of air temperature was similar to that of sea surface temperature (SST). Hourly observation around Dukjuk island showed the cold and saline southwesterly and the warm and fresh northeasterly in phase with tidal current. Sea fogs two times formed at 2300 LST 8-0130 LST 9, and 0300-0600 LST 9 July 2002 during the observation period, respectively. During the initial stage of fogs, winds became northeasterly at the speed of 2-4m/s
, and air temperature dropped to 18
, as the North Pacific High weakened. The satellite image indicated that sea fogs formed over warm water in the western Yellow Sea and moved eastward toward the observation site, which could be called a steam fog. The fogs dissipated when wind speed and air temperature increased.
The Behaviour of Dust Concentrations During Sand Storm in Seoul Area
Kim, Min-Young ; Kim, Kwang-Rae ; Lee, Min-Hwan ; Cho, Seog-Ju ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 315~324
The characteristics of particles were evaluated through the measurement data of PM
and TSP instruments located in air quality monitoring stations installed and operated by Seoul Metropolitan city. The data of particulate mass on the filter was collected bv a high volume air sampler during the sand storm period. The number of days of sand storm in Seoul showed a different pattern from 1990 to November 2002, We can see a trend of increased occurrence and duration of sand storms. The ratio of PM
to TSP was shown as 52.9% and 59.4% during the sand storm period in 2000 and 2001. respectively. It was indicated that the particles larger than 10
m increased by approximately 10% in sand storm periods compared to no sand storm period. While PM
size fraction reached 71.4% in 2002, the contribution of sand storm to total particulate concentration was estimated to be 11.9% for PM
, 23.1% for PM
, 19% for TSP in 2002, respectively and sand storms highly correlated with annual total particulate concentration.
Numerical Experiments on the Terrain Following Strong Wind Phenomenon Effecting to the Onset of Sea Breeze
Lee, Hwa-Woon ; Jung, Woo-Sik ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 325~336
The onset time of sea breeze at Haeundae is faster than that at Suyoung in spite of the observation site at Suyoung being 5m and that of Haeundae being 1 km away from the coastline. We therefore simulate the effects of terrain on the onset time of sea breeze at Suyoung and Haeundae districts by using the LCM(Local Circulation Model). This phenomenon is due to the nighttime density flow, which is created by nighttime radiative cooling. It follows the slope of the highlands surrounding the urban area, gathers at a central area of Busan, and then flows out to a lower area like Suyoung river. This process continues after sunrise. In researching the AWS wind speed, we find an important thing. That is to say, the nighttime mean wind speed at Suyoung is three times greater than that at Haeundae. This property shows that Suyoung is an outflow channel of nighttime air mass. The above observed data shows that terrain effect has a important role on the onset of sea breeze.
Geochemical Compositions of Coastal Sediments around Jeju Island, South Sea of Korea: Potential Provenance of Sediment
Lim, Dong-Il ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 337~345
Surficial sediments from the northern coastal area of Jeju Island, southeastern Yellow Sea (South Sea of Korea) were analyzed for grain-size texture, some geochemical characteristics and clay mineralogy in order to assess their provenance. Rare-earth element compositions and some geochemical discrimination diagrams, especially of Ti/Al, Nb/Al and Rb/Al ratios, were revealed to be useful indices for identifying the origin of sediments. These indices, together with clay mineral compositions, suggest that the coarse-grained sediments originate from the volcanic rocks of Jeju Island, whereas the fine-grained sediments are derived from Chinese rivers, especially the Changjiang River. The oceanic circulation pattern and the physical-chemical properties of seawater in the Yellow and East China seal support the possibility that the fine-pained Changjiang (Yangtze River) sediments can reach the coastal area of Jeju Island (southeastern Yellow Sea).
Geochemical Characteristics and Contamination of Surface Sediments in Streams of Gwangju City
Kim, Joo-Yong ; Koh, Young-Koo ; Youn, Seok-Tai ; Shin, Sang-Eun ; Park, Bae-Young ; Moon, Byoung-Chan ; Kim, Hai-Gyoung ; Oh, Kang-Ho ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 346~360
In order to investigate the geochemical characteristics of surface sediments in streams of Gwangju City, sediment samples from the main stream of Yeongsan river, Hwangryong river, and Gwangjucheon in the city were collected and analyzed for grain size and metal and organic carbon contents. The sediment types of the streams widely vary from pebble to mud. The metal contents in the sediments from Yeongsan river and Hwangryong river are mainly dependent on the grain size of the sediments and the geology around the streams, while the sediments in Gwangiucheon are controlled by organic matter contents from the domestic sewage. The enrichment factor (Ef) and index of geoaccumulation (Igeo) representing the degree of metal contamination in the sediments are relatively low in the mainstream of Yeongsan river and Hwangryong river. However, those of Gwangjucheon show EF values of P=8.30, Cu=5.54, Zn=14.28 and Pb=7.41 and Igeo values of P=3.78, Cu=2.79, Zn=3.66 and Pb=1.59. The heavy metal contamination is especially significant near the area where the Seobangcheon and Donggyecheon branches of Gwanjucheon, join. Therefore, it is suggested that the metallic contaminations of these small streams are significantly influenced by the domestic sewage of the city.
Electric and Electromagnetic Surveys of the Hongseong Fault Zone
Kwon, Byung-Doo ; Lee, Heui-Soon ; Park, Gye-Soon ; Oh, Seok-Hoon ; Lee, Choon-Ki ;
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 361~368
We have investigated the electric resistivity structure of the fault zone located in the Hongseong area where a big earthquake with M 5.0 occurred in 1978. Usually, Electric and Electromagnetic methods are broadly operated in the field of engineering works since these methods are effective to understand the distribution of geological weak zones - fault or fracture zones. We have conducted the dipole-dipole array resistivity method and MT(magnetotelluric) method and interpreted the resistivity distribution of the fault zone with the aid of various inversion methods. An MT survey was performed at 18 points along a 2.9 km survey line perpendicular to the fault line and a magnetic dipole source was used to enhance the S/N ratio in the high frequency. A Electric dipole-dipole array resistivity survey with the dipole length of 50 meters was carried out perpendicular to the fault. In view of two survey results, the fault marks the boundary between two opposite resistivity structures, especially the low resistivity zone is exhibited deeply through the prospective fault line. The result that the low resistivity zone is located at the center of the fault zone corresponds with the fact that the fault zone of the Hongseong area is active. We expect these results to provide basic information about the physical properties of fault zones in Korea.
Journal of the Korean earth science society, volume 24, issue 4, 2003, Pages 369~369