물의 응고 실험에 대한 초등학생의 인식조사 및 부피 변화 비교 실험의 대안 물질 탐색 = Perceptions of Elementary Students about the Water Freezing Experiment and Alternative Material for the Volume Change Comparison Experiment

다국어 초록 (Multilingual Abstract)

The fact that water increases in volume as it solidifies into ice is an extremely unique physical property of water compared with other substances. This study aimed to investigate the perceptions of elementary school students who participated in a water freezing experiment and their understanding of the volume change of common substances. Additionally, it intended to explore and identify a suitable substance for comparison with water in terms of changes in volume during solidification. The results are as follows: Out of 94 students, 82 (87%) were aware that water increases in volume when it freezes. Expanding the target to normal materials, specifically a candle, 32, 32, and 14 students responded with “no change in volume,” “increase in volume,” and “decrease in volume,” respectively. Notably, 10 out of the 32 students who selected “increase in volume” associated the increase in the volume of the candle to that of ice, which they had observed previously. The primary choice for the volume change comparison experiment was 1-decanol. However, it was deemed unsuitable for the experiment due to its unique odor and the difficulty of observing it from outside the container. Ultimately, 1,4-butanediol was selected as the most suitable substance for the comparative experiments because of its observable volume change and lack of odor.