Investigation And Research On The Status Of Chemical Symbol Representation Ability Of Junior Middle School Students

This paper consists of five parts: introduction,theoretical basis of the research,status quo survey,ability training strategy,conclusion and outlook.The first chapter is the introduction of this paper.It mainly expounds the background of the topic selection,literature review,research significance,research ideas and research methods.The literature review is from "macro,micro,symbolic three-characteristic research","study strategy research of chemical symbol learning" Three aspects of "chemical symbol knowledge to solve practical problems" were launched.The second chapter is the theoretical basis of the research,first discusses the chemical symbol theory,including the connotation,classification and characterization of chemical symbols.On this basis,this paper makes an in-depth analysis of the manifestations and causes of cognitive difficulties in macroscopic,microscopic and symbolic triple representation and junior high school students' triple representation.The third chapter is a survey of junior high school students' ability of representation of chemical symbols.It is carried out from four aspects: investigation scheme design,investigation implementation and investigation result analysis,interview result investigation and investigation conclusion.The fourth chapter is the strategy of cultivating junior high school students' ability of representation of chemical symbols,from the aspects of perfecting chemical symbol knowledge,cultivating chemical symbolic representation consciousness,forming chemical symbol representation ability and teaching case analysis,discusses the methods of cultivating junior high school students' chemical symbol representation ability.The fifth chapter is the research conclusions and future prospects,summarizes the research of the subject,and proposes the next research prospects for the existing problems.