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|Other Titles:||Study the Students' Conceptions and Reasonings About the Transformations of Matter through their Abilities of the Conservation of Weight|
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This paper was to study students' conceptions and reasonings about the transformations ofmatter and conservation of weight. The main purposes for conducting the study were:1.to analyze how students perceive the transformations of matter and weight conservation when matter transformed.2.to investigate the relationship between students' conceptions about the tansformations of matter and weight conservation when substance transformed.3.to study the relationship between students' cognitive development and weight conservation abilities when matter transformed. The test instrument for measuring the students' conceptions is a form of group demonstrationtest, which was developed from the first author by referring to some of the other research results. The test consists several concepts : dissolution ' evaporation sublimation ' oxidation andchemical reaction. There were 775 students selected from six junior high schools as the subjectsfor the study. The results of this study were:1.Three types of students' misunderstandings about the transfromations of matter were found as follows:(l)lncorrect conceptions about matter, (2)lncorrect or improper conceptions about the matter transformations, (3)Confusion between chemical change and physical change.2.Four types of students' correct reasoning on weight conservation were found: (l)To posses conceptions about the transformations of matter, (2)Reversibility ' identity and compensation reasoning, (3)The weight is unchanged in closed system, (4)To use laws or rules, such as the low of mass conservation.3.Four types of students' incorrect reasoning of conservation of weight were also found: (l)To lack conceptions about the transformations of matter,(2)0nly consider part of the matter transformed and missing the whole situation, (3)lncorrect conceptions about matter. (4) To mislead by daily life experience.4.The more information students acquired about the transformations of matter, experically inmore complicated transformations, the ea
|Appears in Collections:||師大學報|
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