The Research Of Digital Experiment On The Cultivation Of Chemical Scientific Thinking Of Junior Middle School Students

Chemistry is a subject based on experiments.Chemistry courses in compulsory education are required to guide students to experience the process of scientific inquiry,inspire students' scientific thinking and cultivate their practical ability.Guide students to understand the relationship among chemistry,technology,society and environment,understand the nature of science and improve students' scientific accomplishment.It is a very important task for chemistry teaching in compulsory education stage to inspire students' scientific thinking,to understand matter and its changes from multiple angles,to treat problems dialectically,to make students develop scientific thinking to deal with social problems related to chemistry,to understand the nature of science and to improve students' scientific literacy.In this study,on the basis of literature review,research situation at home and abroad of digital experiment and scientific thinking has made the preliminary understanding,and according to the high school chemistry curriculum standard and the stage of compulsory education curriculum standard revision information for many times,for junior high school students' scientific thinking training requirements defined,from the viewpoints of method,ability,consciousness can be divided into four parts.And according to the interview of teachers and the questionnaire survey of students in the early stage,with the "digital experiment" as the main line,combined with the content of the first and second books of the ninth grade chemistry of the People's Education Edition,the study of "flipped classroom",concept class,review class three teaching practice.After the teaching practice,the questionnaire is conducted to the students again.Through the comparative analysis of the questionnaire,usual homework and communication of the students before and after the teaching practice.The digital experiment provides more accurate data support.The comparative analysis of the macro experimental phenomenon and the corresponding specific data is more persuasive.It guides the students to think and judge the macro experimental phenomenon combined with the empirical data,and improves the students' ability to comprehensively study and analyze problems with general scientific methods.There are also some digital experimental instruments,such as conductivity sensor,to guide students to learn to understand the law of material change from a micro perspective,and develop the ability to infer evidence and build models based on experimental facts.Through the unique real-time curve representation of digital experiment,the micro essence and macro phenomenon are combined.Through a variety of chemical representation methods such as macro and micro,symbols and curves,a variety of scientific methods are used to study substances and their change laws.At the same time,by predicting the curve change of digital experiment,the possible experimental phenomena and conclusions that students originally imagined are presented with real measured data and curves,which leads to students' cognitive conflict.Students carry out cooperative communication and discussion in the process of thinking and judgment,which not only helps to improve students' cooperative communication ability and consciousness,At the same time,it also guides students to form a questioning,critical and innovative consciousness of different views and conclusions in solving complex problems related to chemistry.Through research,it is found that the introduction of digital experiments in junior high school chemistry teaching not only helps to cultivate students' scientific thinking,but also has unique advantages in guiding students to use chemical ideas and methods to discover and solve problems.In the process of analyzing and interpreting macroscopic experimental phenomena in combination with real-time data and curve changes of digital experiments,students subtly form the ability and awareness of applying chemical knowledge and methods to solve general problems,and reconstruct models and cognition through real data and curve changes.Guide students to form questioning,critical awareness and innovative awareness of different viewpoints and conclusions in the process of solving problems.