National junior high school biology examination status and analysis papers
The following is the current situation and analysis of the national junior high school biology examination: ** 1. Exam content ** 1. ** Knowledge points are widely distributed ** - It covered many knowledge points such as ecosystem (such as composition, food chain, ecological balance), water pollution (such as red tide), blood type, infectious diseases (pathogen, common infectious diseases, preventive measures), immunity, metabolism (metabolism, assimilation and dissimilation of animals and plants), internal environment, unconditioned reflex, conditioned reflex, and so on. 2. ** Various questions ** - There were multiple-choice questions, short-answer questions, comprehensive analysis questions, and so on. Most of them were multiple-choice questions. ** 2. Proposition trends ** 1. ** The trend of new questions is obvious ** - The new questions were in a new situation. Although it was easy to fall into traps, the knowledge points were simple, showing the characteristics of a high starting point and a low point. For example, some questions would set up novel situations, which might involve biological phenomena in life or new scientific research results, but the biological knowledge that was tested in the end was basic. 2. ** Modification questions increased ** - It was a new form of examination of existing knowledge. 3. ** Open question characteristics ** - the simulation of the situation, the ambiguity of the conditions, the exploration of the process, the uniqueness of the conclusion, and the comprehensiveness of the knowledge. For example, an open-ended test might require students to analyze a biological phenomenon given. There was no fixed answer. Students needed to use a variety of biological knowledge to answer, and the answer could be in a variety of situations. ** 3. Students 'strategies ** 1. ** Open question ** - He had to learn to eliminate secondary factors, highlight the main factors, and use approximate methods to model them from a disciplinary perspective. For example, when analyzing a polluted ecosystem, one had to find the main pollution factors and construct a relationship model between the organism and the environment to solve the problem. 2. ** Open condition questions ** - The problem solvers were required to imagine boldly, pay attention to transforming the questions to give information, grasp the key to the problem, and find the "breaking point" to solve the problem. 3. ** Strategy Open Questions ** - He thought, explored, and reasoned from multiple perspectives, both positive and negative. He searched for new ideas, optimized strategies, and applied solution methods. 4. ** Open question conclusion ** - Students had to compare various solutions, make full use of the conditions to make reasonable guesses, discover patterns, and draw conclusions. 5. ** Comprehensive Development Questions ** - Students were required to actively participate in the construction of the problem itself by combining their existing knowledge, experience, and thinking ability. ** 4. Review Strategy ** 1. ** Review by turns ** - ** First round of revision **: According to the High School Entrance Examination Guide, review each chapter to ensure that you do not miss any knowledge points. Clear up the concepts and combine similar knowledge points into one unit. This would help students systematically review the basic knowledge and build a complete knowledge framework. - ** Second round of revision **: Revise in different sections to form a knowledge network. For example, he would review the knowledge related to the ecosystem, including the composition of the ecosystem, energy flow, material cycle, etc., to deepen his understanding of the relationship between knowledge. - ** The third round of review **: A comprehensive review of selected topics, including the integration of subjects, the integration of knowledge points, and the review of experiments. Collect more information, pay attention to new situations, and break through difficult and important points. 2. ** Ability Training ** - To improve the ability to read, analyze problems, express, and experiment. In the biology examination, the description of biological phenomena and the analysis of experimental results required students to have strong expressive skills, and experimental skills were also crucial in some inquiry questions. ** 5. Current performance ** 1. ** Average score fluctuates ** - From the analysis report of the biology high school entrance examination results, the average score had increased or decreased compared to the previous year, reflecting the overall trend of the students 'learning results in biology. 2. ** Obvious individual differences ** - There were differences between students 'grades, and the difference between the highest and lowest scores was obvious. Students with better grades had a strong interest in biology and performed well in their studies. ** 6. Experience in teaching, discussion, and exam preparation ** 1. ** Demonstrating class features ** - Some of the demonstration lessons in the revision and discussion activities of the middle school entrance examination reflected some characteristics, such as carefully preparing lessons based on learning conditions, implementing the teaching principle of taking students as the main body, carefully designing the learning guide case, using tables to summarize scattered knowledge, returning to the teaching materials, using charts to compare, classify and connect knowledge, etc. - Clever design of activities to avoid the sense of "repetition" in the review class, reflect the concept of the curriculum standard, cultivate students 'biological science accomplishment, highlight students' independent combing and summary in teaching, guide students to review properly, have research on the middle school examination questions, choose classic topics, train with variations, etc. 2. ** Exam preparation experience exchange ** - For example, returning to the teaching materials, sorting out the knowledge to lay the foundation, unit review, combining lecture and practice to promote consolidation, integrating knowledge, special training to improve and other experiences, as well as creating different types of efficient classrooms from stimulating students 'interest, inspiration and guidance, etc., all helped to improve the students' results in the biology high school entrance examination. 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Junior high school biology examination analysis summary and reflection model essay
The following is a summary of the analysis and reflection of the junior high school biology examination: After the junior high school biology exam, analyzing and reflecting on the exam was an important part of improving the learning effect. ** I. Results ** Judging from the results of this exam, it reflected that there were certain advantages and disadvantages in biology. Some students achieved relatively good results, which indicated that they had a good performance in mastering and applying biological knowledge. However, there were still quite a number of students whose results were not ideal, revealing many problems in the learning process. ** 2. Wrong Question Analysis ** 1. Basic knowledge - Some students made mistakes in basic knowledge such as cell structure and biological classification. For example, the vague memory of the difference between the cell structure of animals and plants reflected the lack of emphasis on basic knowledge in the classroom learning process and the lack of a solid grasp of the basic concepts and principles of biology. - The use of biological terms was inaccurate. For example, when answering questions about the ecosystem, the concept of producer, consumer, and decompose was confused. This may be because the understanding of these concepts was only superficial and did not have a deep understanding of their functions and relationships in the ecosystem. 2. Experiment and application part - He lost more points in the questions involving experimental operation and analysis of experimental results. For example, students might not be proficient in the steps of using a microscope during the actual operation process, resulting in them not being able to answer accurately in the exam. This reflected that the students 'hands-on ability and understanding of experiments needed to be improved in the experimental teaching process. - As for the application of biological knowledge in real life, such as the analysis of familial hereditary diseases according to the law of inheritance, the students showed a lack of ability to combine theoretical knowledge with practical situations. They could not flexibly apply the knowledge they had learned to solve practical problems. ** 3. Reflection on learning methods ** 1. preparation link - Many students didn't develop the habit of previewing, which led to them not being able to keep up with the pace of the teacher in class and not being able to accept new knowledge effectively. Previewing could help students understand the general framework of the course content in advance, find out the difficulties and questions, and listen more specifically in class. 2. classroom learning - In class, some students were not focused and could not listen to every knowledge point explained by the teacher. The knowledge points of biology were more coherent. A single mistake could lead to difficulties in understanding subsequent knowledge. The key content written on the blackboard by the teacher was often the core knowledge of the course. However, some students did not pay attention to this, which affected their overall grasp of the knowledge. 3. Consolidating After Class - After-class review and consolidation were important parts of deepening knowledge memory and understanding, but many students did not do enough in this regard. For example, he didn't organize his notes in time, didn't take the initiative to check the missing content in the classroom, and lacked the awareness to consolidate his knowledge by doing exercises. ** IV. Reflection on teaching strategies (from the perspective of teachers, if applicable)** 1. teaching method - In the process of teaching, there might be problems with the lack of flexibility and variety of teaching methods. For some abstract biological knowledge, such as the breathing function of cells, it might be difficult for students to understand it simply by explaining it. They could use multi-media teaching methods, such as animation demonstration, to visualize abstract knowledge and improve students 'interest in learning and understanding. - In terms of experimental teaching, although experimental courses were arranged, the explanation before the experiment and the guidance during the experiment were not detailed enough. The purpose, steps, and precautions of the experiment should be introduced in more detail before the experiment. Students 'mistakes should be discovered and corrected in time during the experiment. 2. teaching progress - In the arrangement of the teaching progress, there might be situations where some knowledge points were explained too quickly, and the students 'acceptance ability was not fully taken into account. Some students might be afraid of biology because they could not keep up with the progress. ** 5. Modification measures ** 1. the students - They should develop good study habits, including previewing, listening carefully, and reviewing in time after class. During the preparation, one could have a preliminary understanding of the content to be learned by reading the teaching materials and consulting the materials. Focus in class, actively participate in classroom interactions, and follow the teacher's train of thought. After class, you should organize your notes in time and consolidate what you have learned by doing practice questions and reciting key knowledge points. - Pay more attention to the experiment, actively participate in the experiment course, carefully review the experiment content before the experiment, strictly follow the operating procedures during the experiment, and analyze and summarize the experiment results after the experiment to improve their experimental ability and knowledge application ability. - He focused on systematic learning of knowledge, linking various knowledge points in the biology discipline to build a complete knowledge system. For example, in the process of learning about biological evolution, one could connect knowledge points such as genetic variation and ecological environment. 2. Teachers (if applicable) - The teaching method should be optimized and suitable teaching methods should be selected according to different teaching contents. For example, when explaining the reproductive and development process of living things, pictures, videos, and other materials could be used to let students understand this process more intuitively. - Reasonably adjust the teaching progress. According to the actual learning situation of the students, slow down the teaching speed appropriately to ensure that the students can understand and master each knowledge point. At the same time, it was necessary to strengthen the tracking and feedback of students 'learning situation, discover the problems in the learning process in time, and give targeted guidance. - Increase classroom interaction, encourage students to raise questions and doubts, and cultivate students 'independent learning ability and innovative thinking ability. For example, they could organize group discussions so that students could learn from each other and improve together. Through the analysis, summary and reflection of the junior high school biology examination, we can identify the problems in the learning and teaching process, and formulate corresponding improvement measures, so as to improve the quality of biology teaching and learning. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Shaanxi 2022 Junior High School Biology Examination Paper
First, multiple-choice questions 1. The following idioms refer to living things as () - A. The mountains and rivers are unharmed (no living creatures are involved). - B. Beautiful weather (no living creatures involved). - C. The sea dried up and the rocks crumbled (no living creatures were involved). - D. Birds and flowers (Birds and flowers are biological). 2. When using a microscope (as shown in the picture) to observe the permanent section of the root apex, the relevant description is correct () - A. When the lens is contaminated, do not wipe it with your hands (use lens cleaning paper). - B. It was said that the magnifying power of the microscope was 100 times, and there was insufficient information to judge (the magnifying power was the product of the magnifying power of the eyepieces and the objective lens). - C. When observing, the object image is not clear, and it should not be rotated by a large margin.(If it is a coarse focus spiral, it should be used to fine-tune the fine focus spiral first). - D. Observed that the cells in different parts of the root tip are different (such as the cells in the meristematic zone are small and tightly arranged, and the cells in the mature zone have root hair and other structures). 3. The biosphere was the largest ecosystem on Earth. The environments of different regions and various organisms formed a variety of ecological systems. The correct description of the forest ecosystem is () - A. The forest ecosystem has many tall plants. - B. Rich species of animals and plants. - C. Humans do not play a dominant role in the forest ecosystem. - D. It has the ability to adjust the climate (for example, through the use of transpirations to adjust humidity, temperature, etc.). 4. The picture below is a diagram of four single-celled organisms. The correct description is () - A. Single-celled organisms can independently complete life activities (such as nutrition, breathing, secretion, etc.). - B. Not all are harmful organisms, some single-celled organisms are beneficial. - C. Not all organisms can photosynthesize (for example, Paramecium cannot photosynthesize). - D. Not all are animals (like Chrysanthemum is a plant). 5. The Chinese people had many popular poems, many of which could reflect the relationship between living things and the environment. The poem "Swallows fly in the mud, mandarin ducks sleep in the sand" reflected the influence of non-biological factors on living things. This non-biological factor is () - A. Microorganisms (does not fit the question). - B. The temperature (the sand warmth reflects the effect of temperature on the mandarin ducks). - C. Salt (does not match the meaning of the question) - D. Swallows (Swallows are living things, not non-living things). 6. In the following experiment, the correct description of the purpose of using the solution is () - A. To investigate the changes in the oral cavity of steamed buns was to verify that starch was decomposed in the oral cavity (not synthesized). - B. Exploring the production of organic matter by green leaves under light was to verify that green leaves produced starch under light. - C. Observing human oral cavity cells, oral cavity cells do not have plastids. Iodine solution is not used to observe plastids. - D. Observe the structure of the corn seed. Iodine solution is not used to observe the nucleus. 7. The following picture is a diagram of the structure of a bird egg. The blastoderm is () in the pictures (1) to (4)(Since there is no picture, it is impossible to accurately indicate which serial number represents the blastoderm, but the blastoderm is the part of the bird egg where the embryo develops). 8. Xixi wanted to invite a friend from another city to taste mutton buns and roujiamo. From the perspective of a reasonable diet, it should also be matched with the following () - A. Salad vegetables (can supplement vitamins, diet fiber, etc. to make the diet more reasonable). - B. Fried bread slices (high calories, unhealthy). - C. Roasted beef kebabs (repeated more with mutton buns and roujiamo, and barbecued food is unhealthy). - D. Rice noodles and cold noodles (mainly carbs, lacking vitamins and other nutrients). 9. In the experiment to explore the production of organic matter by green leaves under light, the geraniums were dark-treated, covered with black paper on the top and bottom sides of the leaves, and placed under the sun. The variable set for this experiment is () - A. Phosphor (not the experimental variable). - B. carbon dioxide (not the experimental variable). - C. Illumination (use black paper to block the light, the variable is whether there is light). - D. Water (not the experimental variable). 10. The nutrients we obtain from food provide substances and energy to maintain life and health. The role of the following nutrients does not match the example () - A. To provide substances, such as protein (Correct, protein can provide substances such as fatty acid to build the body, etc.). - B. Maintain health, such as vitamins (Correct, vitamins play an important role in maintaining the normal physiological functions of the body). - C. Maintaining life, such as water (Correct, water is a necessary substance for life activities). - D. To provide energy, such as mineral salt (Wrong, mineral salt cannot provide energy. The nutrients that can provide energy are sugar, fat, and protein). 11. In the following blood vessels of the human body, the venous blood flowing is () - A. The pulmonic artery (which flows venous blood, transporting venous blood from the whole body to the lungs for gas exchange). - B. The lung vein (the artery that carries blood back to the heart after gas exchange in the lungs). - C. The main artery (the artery that carries blood from the heart to the whole body). - D. Afferent artery (blood flowing from the artery). 12. In the exam questions activity, - A. Reflex activity (conditioned reflex). - B. Not only is the nervous system involved, but other systems such as the hormonal system are also involved in regulation (such as hormone regulation affecting brain activity, etc.). - C. It was a complex reflex (conditioned reflex), a reflex formed with the participation of the cerebral hemisphere. - D. The nerve center is located in the cerebral hemisphere (not the spinal cord). 13. If you don't have good eye habits, it's easy to develop short-sightedness. What can prevent nearsightedness is () - A. Reading under strong light (not conducive to eye health, easy to hurt the eyes). - B. Do eye exercises (can relieve eye fatigue and help prevent shortsightedness). - C. Rubbing the eyes with dirty hands (unsanitary, easy to infect eye diseases, unable to prevent shortsightedness). - D. Looking at the computer for a long time (easy to cause eye fatigue, not conducive to preventing short-sightedness). 14. Xixi accidentally pricked her finger and quickly withdrew her hand. in that course of complete the action, - A. The biceps contract (not relax). - B. Relax (not contract) the triceps. - C. Bone cannot provide energy (energy is provided by the mitochondria in the cells through respiratory action). - D. Joints act as fulcrums (bones act as leverage, muscles act as power). 15. Xixi found an "ant nest" in the yard. The way ants acquired this behavior was innate. The following animal behaviors are congenital behaviors () - [A. Parroting (Learning behavior)] - B. Police dog solving cases (learning behavior). - C. Squid spraying ink (a congenital behavior). - D. An old horse knows the way (classified as learning behavior). 16. The mosquito larva, commonly known as the somersault worm, was the larva stage of the mosquito's development from egg to pupa. The creature that has the same development process as mosquitoes is () - A. Locusts (the development process is incomplete metamorphosis, different from mosquitoes). - B. Frogs (the development process is abnormal, but not exactly the same as mosquitoes). - C. Silkworm (the development process is completely metamorphosis, the same as the mosquito development process). - D. Pigeon (a bird that develops differently from insects). 17. Microorganisms (viruses, bacteria, and fungi) were inseparable from human life. The beneficial use of microorganisms by humans is () - (1) Cause disease (harmful aspects of microorganisms). - (2) Purification of sewage (beneficial aspects). - 3. Pollution of the environment (harmful aspects of microorganisms). - (4) Food production (beneficial aspects, such as yeast used to ferment bread, etc.). - (5) Production of drugs (beneficial aspects, such as the use of microorganisms to produce antibiotics, etc.) - Hence, it was 2, 4, and 5. 18. Xixi's brother found a small animal in the farmland. If Xixi wanted to understand the characteristics and structure of the animal, she should consult relevant zoological books or biological materials (since there was no more description of the animal, she could not be more specific). 19. When Xixi was flipping through the Compendium of Materia Medica, she learned that the fruit had medicinal values such as stopping diarrhea, treating various hemorrhoids, and sore throats. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2022 Junior High School Biology General Examination Paper
The following is part of the 2022 biology test questions for the junior high school academic level examination in Shen Zhen: 1. Multiple choice questions: 1. In Mr. Lu Xun's "From Baicao Garden to Sanwei Bookstore", the smooth stone well railing was not involved in the description of the scenery. The answer was B. 2. The slide specimen that could see the plastids under the microscope was fresh spinach leaves. The answer was C. 3. (About the cell physiological activity diagram), the answer is D. 4. When the cell image was observed under the low-power objective lens of the microscope, the number of cells in the field of view decreased and the field of view darkened when the objective lens was changed to a high-power lens. The answer was D. 5. There was plenty of rain during the wheat heading and filling stage. The bumper harvest of grain in our country reflected the environmental impact on living things. The answer was A. 6. The flesh cells of the Western Red Pheasant were loosely arranged, and the vesicles were large. They were rich in vitamins and sugar substances. These cells were nutritional tissues. The answer was A. 7. The answer was C. 8. In the summary of the characteristics of plants, the wrong one was mosses, and the answer was C. 9. The structure that developed into the "nucleus" of the longan was the ovule. The answer was D. 10. The measure that was not conducive to increasing the yield of vegetable greenhouses was to reduce the temperature difference between day and night. The answer was B. For the complete test paper and answers, please refer to the answers to the biology test questions of the 2022 Guangdong Junior High School Academic Level Examination. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The Analysis of Junior High School Biology Test Paper
Analysis of the biology final test in junior high school
The following are some of the main points of the analysis of the junior high school biology final test: ##1. Achievement 1. ** Overall results ** - In some areas, the overall results of the biology final exams were not ideal. For example, there were 420 students in a certain district, with an average score of 52.2 points. 87 students scored above 80 points, and 179 students passed. This indicated that there might be areas for improvement in teaching. 2. ** The problems reflected in the results ** - ** Basic knowledge is not well grasped **: For example, some of the questions in the multiple-choice questions are wrong because they are not familiar with the knowledge points. For example, some questions are not ideal because the seventh grade students have just come into contact with biology and their knowledge of botany is mainly in this semester. - ** Poor standard of answers **: In the non-multiple choice questions, students do not answer the questions according to the standard. For example, they were required to fill in the letter code but wrote the structure name, and there were mistakes such as "hereditary" being written as "transmission" and "transfer". There were also problems such as language errors and inaccurate answers. - ** Not careful in reading questions **: It is easy to misread key information in the questions, such as "humidity" as "temperature", etc. In some questions, it is possible to lose points due to the problem of reading questions. ##2. Test Paper 1. ** Proposition characteristics ** - ** Closely adhere to the outline and teaching materials **: The difficulty of the test paper is usually moderate. It is closely related to the requirements of the middle school examination outline and teaching materials. The distribution of knowledge points in each chapter is reasonable. It can test basic knowledge points and flexibly. It requires theory to be combined with practice. - ** Reflects a variety of abilities **: It is open and is conducive to the development of students 'subjective thinking ability. It can guide students to pay attention to social hot topics and practical life. It tests students' ability to analyze and solve problems. It also includes certain knowledge transfer ability and comprehensive ability. For example, some of the questions were related to production and daily life, as well as reflecting the current social hot topics and advanced environmental protection concepts. - ** Diverse question types **: Common question types include multiple-choice questions, short-answer questions, etc. Some test papers have pictures for every non-multiple-choice question, which requires students to have a certain ability to read and analyze pictures. 2. ** Losing Points Analysis ** - ** Multiple-choice questions **: Some of the options are not clearly described, which will cause students to make mistakes. For example, in a certain test paper, the seventh option C is not clearly described, which will cause the highest error rate. There are also questions that are not familiar with the knowledge points and have little contact with the content in life. For example, questions 11 - 13 are unfamiliar with the knowledge points, and questions 24 and 25 are easy to remember wrongly due to lack of contact in life. - ** Non-multiple-choice questions **: For example, the high rate of losing points for question 42 was due to the lack of teaching experience and the students 'lack of understanding of the topic. The reasons for losing points for question 47 included problems in the examination, typos, and misremembering knowledge points. ##3. Teaching suggestions 1. ** Strengthening the teaching of basic knowledge ** - In teaching, students should be strengthened to grasp the basic knowledge, and more emphasis should be placed on the memory and implementation of knowledge points. The professional terms of biology should be strictly required. 2. ** Cultivate multiple abilities ** - It was necessary to strengthen the connection between biology and other disciplines, pay attention to cultivating students 'rigorous scientific attitude, train students to examine questions carefully, and improve their ability to understand the meaning of the questions. The relevant knowledge points should be extended, more theories should be combined with practice, and the hot social information should be transmitted in time to expand the students 'knowledge. 3. ** Focus on experimental teaching (for situations where there is experimental content)** - When doing experiments, he would focus on the principles of experiments, the usage of basic instruments, operating procedures, precautions, error analysis, data processing, and other aspects to improve students 'experimental skills. For designing experiments, one should start from the design methods and principles, so that students could master the rules and methods of solving problems. 4. ** Cultivate the habit of solving problems ** - Students were required to look at the process of solving the questions in recent years, and to solve the questions in a standardized manner. When answering subjective questions, they had to accurately demonstrate the process of thinking and improve their ability to express themselves. 5. ** Carry out homework training ** - Students usually had to use their exercise books to do their homework and conduct time-limited training to simulate the examination state to avoid problems such as forgetting formulas, using the wrong conclusions, and not seeing the complete conditions due to nervousness during the examination. 6. ** Group lesson preparation ** - In-depth and pragmatic work to prepare lessons every week to improve the quality of teaching. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
The National College Entrance Examination, a volume of biology papers, 2021 answers
1. Multiple choice questions: 1. D。This was an error because the mitochondria's DNA was located in the mitochondria's matrix and not on the outer membrane, and it was responsible for the metabolism of the bacteria. 2. B。There are also Dna-protein compounds in the karyomimetics of prokaryotic cells, such as during DNA replication and replication, so this is an error. 3. A。The wheat could not directly absorb and utilize the N <2> in the soil. This was an error. 4. C。It can be seen from the change trend of the number of cells in the picture that the cell reproduction of Group B is accelerated after adding drug X. In Group C, drug X is added first to promote the cell reproduction, and then drug D is added to suppress the effect of drug X, slowing down the cell reproduction trend. If drug X is a protein, drug D may change its spatial structure and thus suppress its function. However, in Group C, drug D is added first to suppress the cell reproduction, and then drug X is added. This does not match the performance in the picture. This item is unreasonable. 5. (Because the document does not fully display the answer content of this part, the answer content of question 5 cannot be accurately provided. Please refer to the complete 2021 college entrance examination biology volume 1 answer document to obtain the accurate answer). (As the document does not fully display part of the content of the non-multiple-choice questions, it is impossible to accurately provide the answers to the non-multiple-choice questions. Please refer to the complete 2021 National College Entrance Examination Biology Volume 1 answer document to obtain the accurate answers.) <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Junior high school entrance examination biology experiment, the cells
In the middle school biology experiment, there was an experiment that involved observing human oral cells. The main experimental steps were as follows: 1. Wipe: Wipe the glass slide and cover glass clean with clean gauze. 2. Drip: Drip a drop of 0.9% physiological salt solution in the center of the slide with a dropper to maintain the normal shape of the cells. 3. Scratch: Use a sterilized cotton swab to gently scrape the inner wall of your mouth (the purpose of gargling is to remove impurities in the mouth). 4. Painting: Put the end of the cotton swab with debris on the glass slide and smear it in the drop of normal salt solution. 5. Cover: Use tweezers to pick up the cover glass, so that one side of it first touches the water drop on the slide, and then slowly lay it flat. 6. Staining: Drop a drop of diluted solution of iodination on one side of the cover glass, and use blotting paper to suck it on the other side of the cover glass, so that the dye solution can permeate the entire specimen. In addition, when making temporary slide specimens of human oral tissues, there were some precautions, such as tilting the toothpicks and not scraping at the same place to avoid scratching the inner wall of the oral cavity; throwing the used toothpicks and blotting paper into the trash can, and wiping the experiment table clean. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Problems in the routine examination of junior high school biology and suggestions
The following problems may exist in the routine examination of junior high school biology and the suggested measures that can be taken: ** 1. Problems ** 1. ** Exams ** - ** Large number of questions **: For example, in the final exam of the second semester of the second year of junior high school, you need to complete 25 multiple-choice questions (a total of 50 points) and 50 small non-multiple-choice questions (a total of 50 points) within 60 minutes. There are a total of 75 questions. The time to answer them is tight. - ** Difficult to differentiate concepts **: Distinguishing the similarities and differences between different species of animals and plants such as mollusks and arthropods is a difficult part of learning and exams. It is easy to confuse concepts and lead to mistakes in answering questions. For example, when determining whether a creature belongs to the taxonomical fish, some names have the word "fish" but are not fish (such as crocodiles, dolphins, squid), while names without "fish" may be fish (such as yellow duck, loach). This is easy to confuse examinees. - ** Confusing **: Some questions test the degree of detail and analytical judgment of the knowledge. For example, the question about the breathing characteristics of pigeons in flight involves the examination of the function of air sacs. Its role in the breathing process is easily misunderstood. 2. ** Experimental teaching ** - ** Incomplete experimental equipment and materials **: Due to the limitations of the objective conditions of the school's laboratory, some experiments arranged in the teaching materials could not be carried out, affecting the ability of students to obtain knowledge through experiments. It also disappointed students because experiments were important to stimulate students 'desire for knowledge. ** II. Suggestion ** 1. ** For exams ** - [Concept learning: Create and use a mind map to distinguish the differences between various concepts. It will help you remember biological concepts, such as distinguishing between different animal and plant concepts.] - ** Answer Skills ** - ** Mark the key words **: Learn to quickly find the key words in the question (the key words). Some questions are very long, but it is easy to find the correct answer after identifying the key words. - ** Carefully and meticulously review the questions **: Answer the questions according to the requirements and pay attention to the special requirements in the questions. For example, you should clearly distinguish whether you need to fill in the structure name or the number in the answer. For the chart questions, you should pay attention to the direction of the arrow. - ** Use scientific language **: Use scientific and rigorous language when answering questions. For example, in biological experiment questions, you must accurately express the experimental conditions. Missing a word may affect the accuracy of the answer. - [Comprehensively consider the problem]: When some questions require mathematical methods to solve biological problems, comprehensive and detailed considerations should be taken into account. For example, when calculating the probability of genetic diseases, a variety of factors should be considered. 2. ** For experimental teaching **: The school should try its best to improve the equipment and materials in the laboratory. Biology teachers should actively carry out effective experimental teaching activities so that students can truly benefit from the experiment. This is because experimental teaching can cultivate students 'ability to combine theory and practice, deepen their understanding of teaching materials, and improve their biological quality. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
2021 Shaanxi Junior High School Biology Examination Paper and Answer
You can click on the download link of the 2021 Shaanxi Province High School Entrance Examination Biology Questions and Answer (Word version) to obtain the complete test paper and answer. The first five pages of the document are as follows: [Name of the document] 2021 Shaanxi Province High School Entrance Examination Biology Questions and Answer (Word Version)[document format] Word Version [document download] click to download the Word document [document download] The first five pages of the document are as follows: <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Analysis of Biology Teaching in Junior High School under the Internet
In the context of the Internet, junior high school biology teaching had many characteristics and changes: ** I. Teaching model innovation ** 1. ** Pre-reading session ** - With the help of the smart classroom to push the micro-class video to assist in the preparation, teachers could understand the students 'preparation situation and problems through data feedback and message boards. Students could discuss online to form a learning community. For example, in the teaching of Understanding the Biosphere, students actively asked questions on the message board after pushing the relevant micro-class. 2. ** Class Introduction ** - Teachers use the wisdom classroom to construct life situations, break through the limitations of time and space in the classroom, and let the students devote themselves to learning. For example, in the teaching of "The Sprouting of Seeds," a "7-Day Observation Diary of Mung Bean Seeds" was arranged. Students used tablets to take photos and upload them to connect life and knowledge. 3. ** Class activity segment ** - The smart classroom was rich in interaction forms, such as answering questions and random roll calls to increase students 'attention and participation. Group discussion missions in the 7th grade biology book "Human nutrition" could be uploaded to the big screen for sharing. - In terms of biological experiment teaching, teachers could display the experiment process through the physical booth of the tablet terminal. The experiments that were difficult to complete in the classroom could be operated using the virtual experiment booth. For example, the experiment of the blood type identification in the Transportation of Materials in the Human Body could be simulated by the students in the virtual laboratory. 4. ** Class feedback segment ** - In the smart classroom environment, the teacher arranged the whole class to answer questions, the students used the tablet terminal to answer the questions and submit them, and the teacher grasped the learning situation through intelligent marking and big data statistics and analysis to promote in-depth learning in the classroom. 5. ** Homework arrangement and evaluation segment ** - In addition to paper assignments, various forms of assignments such as micro-class review and virtual experiments could be arranged to improve the fun and targeting of assignments. In the evaluation class, big data was used to analyze the test situation, and the exercises were customized according to the students 'weaknesses, generating a customized study manual. ** 2. Change in lesson preparation ** 1. ** Preparing lesson information ** - Teachers could upload their coursewares, microclasses, and lesson plans to online platforms (such as QQ groups, WeChat groups, school public emails, etc.) to realize information sharing and teaching experience exchange, make up for the lack of offline lesson preparation, obtain lesson preparation materials anytime and anywhere, improve the humanization of lesson plans, integrate resources, promote the reform of traditional education methods, and improve the teaching level of teachers. ** 3. Teaching Concept Creation ** 1. ** Host and Resources ** - To ensure that students are the main body of learning and give full play to the role of experiments. "Internet +" provided teachers with rich teaching resources, improved teachers 'ability to apply information, made experimental teaching more flexible, and allowed students to learn theoretical knowledge in the process of hands-on operation. 2. ** Flipping the classroom ** - Breaking the traditional teaching method, using the "Internet +" technology to create a flipping classroom, realizing the combination of online and offline education. For example, in the teaching of "Biosphere", students 'subjective initiative was improved through micro-class production. ** IV. Promotion of Happiness Education ** 1. ** Teacher's Happiness Increases ** - In the context of the Internet, the happiness education in junior high school biology teaching first focused on the teacher's happiness. Teachers could organize students to participate in biology learning activities in groups to improve their own teaching happiness. At the same time, the school could organize professional training for teachers to let teachers feel happiness in the process of improving their knowledge level and teaching ability, thus promoting the teaching of biology happiness. 2. ** Student Happiness Experience ** - Biology teaching was integrated into happiness education, focusing on biological knowledge, allowing students to experience the wonders of nature in the exploration of biological knowledge, and gain exploration achievements and happiness. For example, in the aspect of cherishing life education, courses such as refusing alcohol and tobacco, staying away from drugs, and paying attention to health were set up. Students were allowed to participate in learning through a variety of methods (discussion, reading materials, etc.), and the results of the survey were published in small groups and protective measures were popularized. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>