| In 2017,a new chemistry curriculum standard for ordinary high schools was released,which proposed to guide the academic level questions as the core quality.How to better integrate the core literacy into the test questions has become particularly important.Chemical change is the main body of the discipline of chemistry.In the core literacy of chemistry,the focus of "change idea and balance thought" is the cognition of material change.The college entrance examination remains one of the most important exams.How to examine students’ change ideas and balance ideas,which will have enlightenment to high school chemistry teaching.So this paper in the 2018-2021 national college entrance examination 11 sets of chemical papers and material changes and chemical balance related to the research object,according to the curriculum standard about the "change idea and balance thought" literacy analysis and the literature research perspective,this paper constructs the test situation,practical problems,necessary knowledge and literacy level thinking questions analysis framework,and in 11 sets of choice and statistical analysis,and draw the following conclusions.（1）The questions of "change concept and balance thought" literacy has examined the same proportion of the national papers in the nearly four years.From2018 to 2020,the scores of national volume I and national volume Ⅲ are slightly higher than national volume Ⅱ,and the scores of the corresponding volumes in the past four years are relatively stable.Among them,the main investigation topic is the principle question of chemical reaction and the test questions related to electro chemistry.In the context creation of such topics,there are more scientific research and production process situations.The association type of the test situation and the actual problem belongs to the combination type.（2）In terms of the dimension of knowledge,the balance of chemical reaction,energy,direction and limit of chemical reaction have been involved in the three national volumes in recent years,and the frequency of investigating chemical reaction balance in the national volume has increased from 2019 to 2021.However,the scores of change nature,characteristics and chemical reaction rate,are relatively few.The scores of the energy of chemical reaction,,are relatively high,but less stable.In the national volume Ⅲ,the direction and limit of chemical reaction higher than the national volume I and national volumeⅡ.（3）For level,mainly focus on level 3 and level 4,including the highest proportion,for level one,level 2,statistical analysis from the level of frequency,the weighted average basic in 2.7-3.5 this interval,mainly above 3,for the literacy is also in the middle level. |
