Advanced Study On The Subject Of High School Physics "electrostatic Field"

At present,countries around the world have carried out basic education curriculum reforms,focusing on improving the quality of science education in order to cope with the increasingly fierce international competition.When formulating new curriculum documents,countries pay attention to the development of students'core concepts and become the trend of reform.The research on the advanced learning of core concepts has become one of the hotspots in the scientific education field in recent years.This paper combines these research hotspots around the"electrostatic field".The topic begins to learn advanced research.Firstly,according to the curriculum standards and teaching materials,combing the related concepts of the "electrostatic field" theme,the hierarchical diagram of the electrostatic field concept is obtained;based on the solo classification theory,the students' cognitive level of the "electrostatic field" theme is divided into:single-point structure level Four levels of multi-level structural level,associated structure level and abstract expansion level;the advanced learning framework of the"electrostatic field" theme is constructed from the two dimensions of "charge" and"basic nature of electrostatic field".Secondly,according to the "electrostatic field" theme to learn the advanced framework,the "electrostatic field" theme advanced test volume is compiled.After the test,the Rasch model is used to analyze the quality of the test paper,and the test volume is adjusted according to the analysis result,and a test volume with good reliability and validity is obtained.Again,using the adjusted test volume for large sample testing,based on the test results,the "electrostatic field" theme learning advanced framework is verified and adjusted,and finally the students are described in terms of "charge" and "basic nature of electrostatic field".The electrostatic field" theme learns the performance expectations of the advanced 4 levels:1."Charge" dimension(1)Single-point structure level:It can enumerate the static phenomena common in life,and know the related physical concepts such as frictional electrification,charge,point charge,and charge quantity.(2)Multi-point structure level:Know the content of charge conservation,and can explain the common static phenomenon in daily life;know the formula and applicable conditions of Coulomb's law,and can carry out related calculations.(3)Level of correlation structure:From the micro level,the atomic structure model can be used to analyze the nature of charged objects;the point charge model can be used to quantitatively analyze the interaction between charges and deepen the understanding of Coulomb's law.(4)Abstract level of expansion:Integrate the relevant knowledge of the "charge"dimension to solve the practical problems of "electrostatic copying" and"electrostatic dust removal".2."Basic nature of electrostatic field" dimension(1)Single-point structure level:It is known that there is a special substance-electric field around the charge,and the concepts of electric field force,electric field line,electric field strength,and potential energy can be known and can be used to describe the electrostatic field.(2)Multi-point structure level:Know the concept of potential,and use the potential to describe and understand the electrostatic field from the energy point of view.(3)Level of correlation structure:Deeply understand the concept of electrostatic field,master the relationship between the concepts of "electrostatic field",and analyze the problem by using the two basic properties of electrostatic field.(4)Abstract development level:It has a comprehensive and profound understanding of the electrostatic field.It can combine the related knowledge of mechanics and functional relationship,accurately analyze the motion of charged particles in the electric field,and deepen the physical view,movement and interaction,and energy.Basic concept.Then,based on the test results,the sample students' current distribution of the cognitive level of the "electrostatic field" theme is analyzed:14.0%of the students are at the single-point structure level,25.4%of the students are at the multi-point structure level,and 5 1.0%of the students are at the level of the associated structure.9.6%of students are at the level of abstract expansion structure.Finally,based on the research conclusions,suggestions are made on the teaching practice of the "electrostatic field" theme.