Comments on the difficulty of 202 1 Changchun senior high school entrance examination chemistry paper

202 1 The chemistry proposition of senior high school entrance examination carries out the reform spirit of senior high school entrance examination, implements the requirements of the evaluation system of senior high school entrance examination, gives full play to the core functions of educating people, serving materials and guiding teaching, selects situational materials such as daily life, chemical production, frontier of science and technology, learning experience and chemical history under the background of the new era, innovates the presentation form of examination questions around the main contents of the subject, highlights the investigation of necessary knowledge and key abilities, reflects the connection between examination and teaching, and enhances the positive guiding role of examination evaluation.

First, around the theme of the times, carry forward the core values and implement the fundamental task of Lide Shu Ren.

Chemistry 202 1 for senior high school entrance examination focuses on the great contribution of material chemistry, life chemistry and environmental chemistry to the national economy, social development, human civilization and the improvement of people's lives, and carefully creates problem situations.

The Shenzhou-12 manned spacecraft sent astronauts into space and core cabin, which marked that China officially became a space power, and the scientific utilization of chemical fuels was of great significance. The eight questions in the test paper take this as the topic situation to investigate the micro-process of spacecraft fuel combustion, deepen students' understanding of the relationship between chemistry, science and technology and society, and make students further realize the great contribution of chemistry to social development and human progress.

China is an ancient civilization with a long history and profound cultural heritage. So far, the earliest bronzes found in China came from the late Neolithic Age, and the larger bronzes were found in the early Shang Dynasty. In Song Dynasty, Meng Qian made it clear that vitriol can also be used to smelt copper. The question 16 (2) in the test paper is based on this situation, which not only examines the chemical knowledge, but also promotes the excellent Chinese traditional culture, establishes the craftsman spirit and scientific innovation consciousness, thus enhancing students' national pride.

Second, focus on the key abilities, inspect the discipline accomplishment, and highlight the unique educational value of the discipline.

Information acquisition and processing is the foundation of the ability development of the whole chemistry discipline. 202 1 Chemistry test questions for senior high school entrance examination provide rich information through tables and graphs, and deeply examine students' information sorting ability. Test paper 17 gives the solubility of two substances at different temperatures in the form of tables, and puts forward related problems to solve, and examines the students' information acquisition and processing ability. At the same time, 15 focuses on students' ability to publish information in a standardized way.

Scientific inquiry is not only an important content of chemistry learning in compulsory education, but also an important learning method. The 202 1 senior high school entrance examination questions focus on the development level of students' academic literacy with scientific inquiry as the core. For example, 2 1 topic, starting with the mind map of subject knowledge, carries out the experimental verification of the chemical properties of alkali. The innovation of the test questions lies in finding more complex real questions in the further study of the experimental results. The test questions comprehensively investigate the links such as conjecture, scheme design and implementation, and scheme evaluation. It embodies the proposition theme of evaluating the development level of students' core literacy.

Experiment is the basis of chemistry and an important way for students to improve their academic literacy. The score of 202 1 senior high school entrance examination is 25, accounting for 50%. Questions 4, 9, 10, 15, 18, 19, and 2 1 in the test paper are written in combination with the textbook experiment, from the basic operation of the experiment to the preparation of common gases.

Third, pay attention to the subject thought, pay attention to the connection between examination and teaching, and give full play to the positive guiding role of examination.

Pay close attention to compulsory education chemistry curriculum standards and junior high school teaching practice, implement the overall plan of deepening education evaluation reform in the new period, ensure the foundation, enhance flexibility, guide and reduce rote memorization, and give full play to the positive guiding role of the senior high school entrance examination proposition.

The examination questions focus on chemical terms and concepts, material structure and properties, material changes and other necessary knowledge. For example, 1, 2, 3, 5, 6,1,12, 13, 14, 20 in the test paper are all about the basic knowledge of chemistry. This paper attempts to guide teachers to pay attention to all students, pay equal attention to knowledge and literacy, and realize students' all-round development and personality development.

The examination questions focus on examining the theme. For example, the question 19 (3) examines students' ability to discover the quality relationship between substances in multi-step experiments. If students can solve problems based on the discipline thought of element conservation, they can simplify seemingly complicated problems, guide teachers to pay attention to cultivating students' discipline concepts in discipline teaching, and achieve the purpose of unifying concepts and methods.

The 202 1 Changchun senior high school chemistry examination paper takes "moral education, quality, foundation implementation and innovation" as the guiding ideology, the development level of subject quality as the evaluation purpose, and the real situation as the topic carrier to comprehensively examine students' necessary knowledge and key abilities, which is conducive to moral education, talent service and teaching guidance.