A Study On The High School Pupils' Micro-Comprehension Of The Concept Of The Gas-Pressure

The basic physics concept is a skeleton forming physics,in order to learn physics well,what's the most important is to truly understand the meaning of physics concepts.But in the actual teaching,we find that the students will encounter many obstacles in the process of leaning physical concepts and come into being an illusive burden for a long time "it is too difficult to study physics well ",meanwhile some teachers also feel that "it is very difficult to teach physics".These deep reasons are that students have hold their own various pre-conceptions or alternative frameworks before and amidst the process of studying physics concepts.these alternative frameworks tend to become a negative obstacle in learning the scientific concepts.Since the mid-1970s,science education researchers abroad have paid much attention to the research of students'understanding about concepts and achieved fruitful achievements.Mainly in the fields of power,electricity,magnetic,optical,thermal and other physical concepts research,particularly the study of mechanical concept has been furthered deeply.The research of students'concept-understanding in China set off relatively late,but later the research on the students'pre-conception (alternative frameworks) has attracted much attention of a large number of physical educators. They concluded models of the alternative frameworks of students'learning physics and corresponding change-concept strategies contributing significantly to the improvement of physics concepts teaching effect.Based on my actual physical teaching and the interviews with frontline teachers,we find that the high school pupils have more difficult to understand the micro-concept of gas-pressure and have a lot of alternative frameworks about the law of the campaign of gas elements and explaining the micro-concept of gas-pressure with the use of the law.So the purpose of this study is to investigate and analysis which different ideas (alternative frameworks) both the high-grade students and the low-grade students have in micro-understanding of the concept of gas-pressure by testing a questionnaire and interviewing.Then I'd like to analysis the reasons for the students'forming these alternative frameworks and mis-concept,with the purpose to provide some initial solutions for the vast number of teachers engaged in teaching the concept of gas-pressure and to do some basic work for the reform of physics teaching.Under the guidance of constructionism learning theory and the conceptual transformation theory,through inspecting the research about the understanding about concepts of the gas-pressure and about the molecular-kinetic theory involving students both domestic and abroad and through discussion with the frontline teachers,I design a questionnaire.Through investigation and analysis about small samples in Yangshuo high school,we find that for both high school grade one students or high school grade three students,the understanding about molecular-kinetic theory and the micro-explanation about the concept of the gas-pressure using molecular-kinetic theory can be divided into three levels:first,replacing the micro-explanation with the macro-qualitative concept; second,alternative frameworks obtaining micro-molecular...