Development of a Teaching Material for Understanding the Earth’s Layered Structure: A Sensory Tool for Specific Gravity

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  • 地球の層構造を理解するための教材開発―比重の体感教材―
  • チキュウ ノ ソウ コウゾウ オ リカイ スル タメ ノ キョウザイ カイハツ : ヒジュウ ノ タイカン キョウザイ

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<p>We developed a teaching material for better understanding the Earth’s layered structure. The teaching material consists of a glass cylinder containing five materials (air, water, quartz, olivine and mercury), which represent each major layer of the Earth (atmosphere, ocean, crust, mantle and core). By flipping the cylinder we can recreate density stratification as many times as needed. In order to comprehend the importance of the newly developed teaching material, we performed a study program to compare the usefulness of various tools. The results of a questionnaire survey show that students’ comprehension of specific gravity is low when experiencing only a hanging-type tool. In contrast, when experiencing a cylinder-type tool, comprehension is improved. This is because the prior use of a cylinder-type tool imparts a clear feeling of specific gravity through the visual sense, leading to preparation for experiencing a hanging-type tool.</p>

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