水に浮かぶ球体にはたらく表面張力の教材化 : 小学校での授業実践を通して  [in Japanese] Teaching Materials for Surface Tension Acting on Spheres Floating on Water with Class Practice in a Public Elementary School  [in Japanese]

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Author(s)

Abstract

静電気実験に用いる電気振り子球を浮きとして用い,水面上の浮きの動きを表面のぬれによる表面張力により説明できる実験教材を開発した。水面上の2個の浮きは,両方ぬれている又は両方ぬれていない場合はそれぞれ引き合い,ぬれているものとぬれていないものの組合せでは退け合った。また,浮き表面のぬれは容器底面に映る影で容易に判別できた。このことから本教科は,浮き表面のぬれと表面張力の理解に向けた力学的アプローチのために有効な教材と考えられた。次に,公立小学校6年生に,総合的な学習の時間(3時間扱い)に,浮きの移動原理を探る探究学習を実施した。質問紙調査と学習カードに書かれた自由記述のカテゴリ分析を行った結果,本実験教材は,表面張力についての理解が得られるだけでなく,学習意欲や興味関心など授業に対する肯定的認識を高めるために有効であることが示唆された。

Teaching materials for surface tension were developed. The materials consist of spheres floating on water. The spheres have good conductivity, so as not to become charged. The behavior of the spheres is explained by the surface tension depending on the factor of wettability. When two spheres have the same wettability (both are wet or neither is wet) an attractive force works between them; when two spheres have different wettability (one is wet and the other is not) a repulsive force works between them. The wettability of spheres can easily be determined by the shadows reflected on the bottom surface of the water-container. These facts show that these teaching materials are useful for a dynamic approach to understanding surface tension and wettability. A unit program in three class hours has been proposed to research the possible cause of the behavior of the spheres and to understand surface tension, and this program has been implemented in the integrated study classes for sixth grade students of a public elementary school in Nagano Prefecture. Our program was evaluated by observation of the activities of the students and by category analysis of the results obtained from questionnaires administered to students after each class hour. It was found that the student's learning process, including the understanding of content, the pleasure of learning, interest and concern, and learning motivation, had been enhanced.

Journal

  • Journal of research in science education

    Journal of research in science education 47(1), 17-23, 2006-07-31

    Society of Japan Science Teaching

References:  4

Codes

  • NII Article ID (NAID)
    110006884572
  • NII NACSIS-CAT ID (NCID)
    AA11406090
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    13452614
  • NDL Article ID
    8048565
  • NDL Source Classification
    ZF9(教育--各科教育)
  • NDL Call No.
    Z7-1282
  • Data Source
    CJP  NDL  NII-ELS 
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