How to learn junior high school chemistry in a short period of time

1. Listen carefully and take good notes. Good notes are the condensation, supplementation and deepening of textbook knowledge, and the presentation and refinement of the thinking process. Since the knowledge points of chemistry are numerous, fragmented and scattered, in addition to listening carefully and thinking positively, in addition to listening carefully and thinking positively, we should also write down the key and difficult knowledge of the teacher in our own words on the basis of understanding, so as to facilitate future review.

2. Review in a timely manner. Revision is not just a simple review of knowledge, but considering the interconnection of old and new knowledge in one's own brain, and reorganizing it to form a new body of knowledge. Therefore, after class, it is necessary to review the content of the lecture in a timely manner, and do a good job of sorting out and summarizing the knowledge, so as to make the knowledge integrate and avoid the phenomenon of more and more chaos in learning.

For example, if you learn about the bleaching properties of SO2 and chlorine water, you can compare them to find out the differences. 3. Learn to memorize because there are many chemical knowledge points to be memorized, it is difficult to memorize if you rely on rote memorization, so you should learn to memorize skillfully. Commonly used memorization methods in chemistry are:

Comparative method (often used for confusing and interfering knowledge.) The four similar concepts of isotope, allotrope, homologue, and isomer can be deepened and remembered through comparison. ), induction, song recipe memory, comprehension memory, and experimental memory.

4. Practice is an important way to understand, digest and consolidate classroom knowledge. However, the practice should be targeted, not a sea of tactics, and should be aimed at mastering the basic methods and the rules of problem solving. In the process of problem solving, it is necessary to pay attention to multiple solutions and inductive summarization of one problem, so as to achieve the effect of doing one problem and one category.

For example, the techniques commonly used in chemical calculation include: conservation method, relational method, extreme value method, average value method, estimation method, difference method, etc. 5. Prepare a "Mistake Book" The purpose of doing questions is to cultivate ability, find your weaknesses and shortcomings, and find an effective way to do so.

Therefore, mistakes should be corrected and recorded. When recording, you should analyze the reasons for the error and the correct solution idea in detail, and do not simply write an answer. At the same time, it is important to go through the review frequently so that you can avoid similar mistakes in the future.

6. Pay attention to chemical experiments Chemistry experiments can not only cultivate students' ability to observe, think, and practice, but also deepen their knowledge and understanding of relevant knowledge, so we must pay attention to chemical experiments. When doing experiments, we should ask a few more whys, think about how to do it, why we do it, and what else can be done, so as to achieve the purpose of "knowing what it is and why it is true". In addition, in order to study chemistry well, we should pay more attention to social hot issues and life problems related to chemistry, and be good at combining book knowledge with practice.

In fact, it is to memorize those key things, such as solubility formulas, eight precipitations, valency formulas or something, according to these and then practice, in fact, some seemingly difficult inference questions or calculation questions are enough to dissect into some knowledge pieces according to these basic knowledge, and then it is not very difficult, calculation questions to find a good quantitative relationship, everything is difficult at the beginning, I was not good at chemistry at the beginning, the grades are slowly up, and now I look back and don't think how difficult these things can be, and the high school entrance examination that is too difficult will not be involved, If you have a solid foundation, you will be able to achieve good results in the high school entrance examination.

The foundation of chemistry is the elements and chemical reactions, and it is necessary to grasp the principles of chemical reactions. The steps are as follows:

1. Deeply understand the nature of chemical reactions, and keep in mind the main components of chemical reactions;

2. Learn the essence of redox reaction, oxidation reaction and reduction reaction;

3. Memorize and memorize commonly used chemical reaction equations and typical chemical reaction equations;

4. Read the texts carefully to enhance the interest in chemistry;

5. Enhance extracurricular exercises and enhance your confidence.

1. First of all, you must memorize the chemical equation carefully (I won't talk about it if you listen carefully in class) and have to memorize it skillfully, not all the stoichiometric numbers together (some of the more difficult and important ones to memorize, such as the reaction of copper and concentrated and dilute nitric acid, the burning of pyrite, etc.); There is a god shouting that some redox reactions must master the skills, oxidant, reducing agent between the electronic gain and loss relationship to figure out, another point to emphasize, must be carefully the equation that appears in the book.

2. Do more questions, especially the homework assigned by the teacher, generally these homework are more basic and typical topics, you must understand them, and you can add some extracurricular exercises after school.

3. The knowledge points in the books should be memorized, especially those that are close to life and pre-travel production, which are hot spots in recent years.

4. Properly remember several chemical calculation methods, such as the limit method, the difference method, the conservation of gain and loss electrons, etc., and do a few questions about this method if you use it flexibly, which can greatly shorten your time to do chemical problems.

5. If you don't understand, you must ask the teacher in time.

6. When reviewing before the exam, you should pay attention to the basics, and if you don't do well in the exam, it is because the simple basic knowledge is not solid.

Here's how to learn chemistry in junior high school:

1. Preview before class and listen carefully during class.

1. As a new subject, students are relatively unfamiliar. At this time, we need to do our homework before class, and browse the content of the textbook before the formal class, and roughly know the key and difficult points in the learning chapters. In this way, you can listen to the lecture with questions and grasp the important and difficult points in the learning chapter.

2. In class, students should follow the teacher's rhythm, keep up with their eyes, and keep up with their thinking, so as to make the most effective use of the time in chemistry class. In the classroom, you should interact more with the teacher, and if you don't understand, you should ask the teacher in time, and it is best to solve the problem in the classroom.

3. In the experimental class, you should carefully follow the teacher's rhythm to do the experiment, remember the steps of the experiment, and the phenomenon of the experiment. When the classroom is used well, learning chemistry is half the battle. Another point is that you must learn to take good class notes and mistake books, there are a lot of knowledge points in chemistry, and if you are not careful, you will make mistakes.

2. Memorize the periodic table.

1. To learn chemistry, you must memorize the periodic table. The periodic table is the basis for learning chemistry, and the periodic table can accurately identify the characteristics of various elements and the relationship between them, so the periodic table is widely used in chemistry and science, and it is also the first part of every student to understand when they first learn chemistry.

2. There is still a certain skill in memorizing the periodic table, and it is easy to memorize it by mastering the skills of memorization. First of all, the first step is to know the words and symbols of each element, and the words you don't know must be checked in the dictionary. The second step is to memorize the elements of the top 20 first, and generally junior high school only requires mastering the top 20.

3. You can use the homophonic dear Li Pipeng (hydrogen, helium, lithium, beryllium, boron), and Tandang Yangfulai (carbon, nitrogen, oxygen, fluorine, neon). That beautiful Guilin (sodium, magnesium, aluminum, silicon, phosphorus), milk to add calcium (sulfur, chloride, argon, potassium, calcium). The last step, after being familiar with Chinese, then memorize the symbols one by one.

Junior high school chemistry learning skills: 1. Be diligent in previewing, good at listening to lectures and taking notes; If you want to learn chemistry well, you must first understand this course, you must preview before class, in addition to reading the content of the new course carefully, you should also mark the areas you don't understand, and try to do the exercises in the textbook; 2. Review often and memorize more; After class, you should review in time and do your homework carefully, which is an important part of learning chemistry well, and the review can be reviewed after class, after week, unit review, chapter review, comprehensive review, etc.

The major of chemistry cultivates high-level professionals who have the basic knowledge, basic theories and basic skills of chemistry, and can engage in scientific research, teaching technology and related management in chemistry and chemistry-related science and technology and other fields.

The difficulty of chemistry in junior high school is not very large, but it is just to get in touch with some basics of chemistry to lay a foundation for future learning.

Students entering the third year of junior high school are exposed to a new subject, chemistry. Chemistry is a very simple or difficult subject, mainly to see if you can find the right way to learn. So how can you learn junior high school chemistry quickly?

Follow these steps to learn junior high school chemistry quickly:

1. Preview the junior high school chemistry knowledge to be learned in advance and make a record. Doing a preview ahead of time has the following benefits:

1) Preview can strengthen the pertinence of lectures, help to discover problems, grasp the key points and difficulties, and improve the efficiency of lectures;

2) Preview can improve the level of taking lecture notes, know what to remember, what not to remember, what to remember, and what to remember;

3) Preview can save time in reviewing and doing homework after class. Through independent thinking during preview and deep impression left by listening to lectures, the time for review and homework after class is shortened;

4) Preview can cultivate self-learning ability. The process of pre-study is the process of self-consciousness or independent thinking, and long-term persistence will definitely improve the self-learning ability.

2. Listen carefully to the teacher's lectures when learning junior high school chemistry knowledge in class, and put forward the problems you encounter in the preview to seek answers.

3. Review the junior high school chemistry knowledge learned after class, and summarize the key points and difficulties.

As a new course just opened in the third year of junior high school, junior high school chemistry has no basic problems, and all students have the same starting point, and they must build confidence to learn chemistry well at the beginning. This is very important for students in the third year of junior high school, and learning chemistry well will also have a good interest transfer effect on the study of other subjects; It can better help students adjust their status.

Junior high school chemistry belongs to the liberal arts of science, and there are many things that need to be memorized, so students should not ignore this problem because junior high school chemistry is simple. For the content that the teacher asks to memorize, it should be treated.