マグマの粘性と火山体の形状に関する教育実践:スライムを用いたかんたん実験とその学習効果  [in Japanese] Study of the Relationship between Magma Viscosity and the Shape of a Volcanic Edifice: A Simple Experiment Using Slime and Its Educational Effectiveness  [in Japanese]

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Abstract

<p>異なる粘性のスライムを用いてマグマの粘性と火山体の形状を関連づける授業実践を行った.スライムは作製が容易であり,低コストで実験ができる.ポリビニルアルコール(PVA)を主原料とする洗濯のりと水の割合を変えることで異なる粘性のスライムを作製することが可能であり,それらをトレイに載せて観察することで,マグマの粘性と火山体の形状の関係を理解することができる.スライムは重ねることもでき,成層火山の形成過程の理解を深めることも可能である.この教材を用いて授業を行い,授業の前後で実施したテストの結果から,生徒の学習内容の理解が大幅に増加したことがわかった.スライムはマグマの粘性と火山体の形状との関係を知るうえで優れた教材だと考えられる.</p>

<p>We report the educational effectiveness and the results of a volcanology class conducted in a junior high school in Kobe, Japan. The aim of the class was to show the relationship between the viscosity of magma and the shape of a volcanic edifice by using slime made with polyvinyl alcohol (PVA), water, and sodium borate (borax) as an educational tool. Slime, of different viscosities, can be obtained by changing the ratio of laundry starch (PVA) and water. The resulting slime can be easily piled up to model a volcanic edifice. Students can learn about the formation process of a natural composite volcano and the relationship between the viscosity of magma and the shape of the volcanic edifice by observing a volcanic model made of the slime. An improvement in the learning effect achieved by using a volcanic model in the class was documented by a comparison of the pre- and post-test results of the students. The slime used can be made inexpensively with equipment at hand, and shows a good overall learning effect.</p>

Journal

  • Education of Earth Science

    Education of Earth Science 69(4), 185-198, 2017

    Japan Society of Earth Science Education

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