• Title/Summary/Keyword: Lake Shiwha

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Investigating Science-Talented Students' Understandings and Meaning Generation about the Earth Systems Based on Their Geological Field Trip Reports (야외지질답사 보고서에 나타난 과학영재학생들의 지구계 이해와 지구계 의미 생성 탐색)

  • Yu, Eun-Jeong;Lee, Sun-Kyung;Kim, Chan-Jong
    • Journal of the Korean earth science society
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    • v.28 no.6
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    • pp.673-685
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    • 2007
  • The purpose of this study was to investigate Earth Systems Understandings (Mayer, 1991) and Earth Systems meaning generation reported by science-talented students who participated in a geological field trip. The eight (4 female and 4 male students) field trip reports were randomly selected among all the reports written by twenty eighth-grade students who joined Shiwha-Lake field trip in Korea. The three-step program, including preparation, field trip, and summary, was provided to the students in order to facilitate meaningful learning through outdoor teaming activities. Seven Earth Systems Understandings and thematic types (Keys, 1999) were used to analyze the reports. The results of this study indicated thai aesthetic views and stewardship toward the Earth, which were the most distinguishing characteristics in Earth Systems Education, were reflected on most of the reports. The results also showed that the students tried to represent their understandings in such a type as meaning extension, meaning enhancement, or meaning elaboration. Overall, many students used 'knowledge-telling' process with a long list of observations and facts, whereas a few students used higher-order 'knowledge-transforming' process by coordinating their findings with interpretations and reasoning in their writings.

Distribution Characteristics of Heavy Metals for Tidal Flat Sediments in the Saemankeum Area (새만금 갯벌의 중금속 분포 특성)

  • KIM Jong-Gu;YOO Sun-Jae;CHO Eun-Il;AHN Wook-Sung
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.36 no.1
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    • pp.55-61
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    • 2003
  • This study was conducted to evaluate distribution and behavior characteristics of heavy metals for tidal flat sediments in the Saemankeum area. The value of heavy metal contents in the tidal flat sediments were higher than that surveyed in 1994, but showing that it's lower when compared with the value of Shiwha lake. Enrichment factors in the tidal flat sediments showed below 1 except for Pb and Zn. Metal excesses was appeared that Cu, Cr, Fe, Mn lacked and Pb, Zn were high. The correlation analysis between heavy metals and organic matters was found high positive relationship (r=0.424$\~$0.839), especially correlation coefficient between ignition loss and oxide Al, Fe, Mn showed high positive relationship above 0.7. The correlation analysis between Brain size and hear metals was found that as grain size was small, heavy metals contents were increased. Correlation coefficient between silt and heavy metals except for Cu, Pb showed high positive relationship as 0.552$\~$0.732.