Methods of learning physical chemistry well
(1) Sanji. Basic concepts should be clear, basic laws should be familiar, and basic methods should be skilled. Give an example about the basic concept. For example, speed represents the distance traveled by an object in a unit time: v = s/t, and for the basic law, for example, the formula for calculating the average speed is also v = s/t, which is applicable to any situation. For example, the speed of a 100-meter athlete is 65438+100-meter/s when passing half the distance, and it is 8m/s when reaching the finish line. The time for running the whole course 100m is 12.5s, and what is the average speed? According to the law of average speed, the average speed is equal to V = 100/ 12.5 = 8m/s, and then let's talk about the basic method. When learning junior high school physics problems, sometimes we should pay attention to choosing "objects". For example, when solving problems with ohm's law, it is necessary to make clear whether ohm's law applies to the whole circuit, that is, the whole circuit, or to a certain resistor, that is, a single resistor.
(2) Do the problem independently. Do some problems independently with good quality and quantity (meaning not relying on others). There must be a certain number of topics, not too few, but also a certain quality, that is to say, there must be some difficulty. Anyone who studies mathematics and physics can't learn this level well. Solving problems independently may sometimes be slow, sometimes you have to take detours, and sometimes you can't even solve them, but these are normal and the only way for any beginner to succeed.
(3) Physical process. To clarify the physical process, there must be hidden dangers in solving problems if the physical process is not clear. No matter how difficult the topic is, try to draw as much as possible, some can draw sketches, and some need to draw accurate pictures, using compasses, triangles, protractors and so on. To represent geometric relationships. Drawing can turn abstract thinking into image thinking and master physical process more accurately. With this diagram, we can make state analysis and dynamic analysis. State analysis is fixed, dead and discontinuous, while dynamic analysis is alive and continuous, especially when solving circuit problems. Without drawing a circuit diagram, it is difficult to know whether the resistors are connected in series or in parallel.
(4) attending classes. Listen carefully in class and don't think or think as little as possible. Don't be self-righteous, learn from the teacher modestly. Don't give up listening just because the teacher speaks simply. If this happens, it can be regarded as review and consolidation. Try to be consistent and synchronized with the teacher, and you can't do it yourself, otherwise it will be self-study. After getting started, with a certain foundation, you are allowed to have your own activity space, that is, you are allowed to have something of your own. The more you learn, the more things you have.
(5) notebook. Class is mainly based on listening, and there are notebooks, and some things should be written down. Knowledge structure, good problem-solving methods, good examples, places you don't understand, etc. Should be recorded. On the one hand, I have to sort out my notes after class? Digest well? On the other hand, it needs to be supplemented. Notebooks are not only used to remember what the teacher said in class, but also to take some reading notes. Also write down the good problems and good solutions found in the homework, which is what students often say? Okay, question Ben? . Hard-won notebooks should be numbered, studied later and kept for life.
(6) learning materials. Learning materials should be well preserved, classified and marked. The classification of learning materials includes exercises, papers, experimental reports and so on. Marking refers to, for example, marking exercises. General questions are not marked. Good questions, valuable questions and error-prone questions are marked differently for future reading. Marking can save a lot of time.
(7) time. Time is precious. If you don't have time, you won't have time to do anything, so pay attention to making full use of time. This is a very superb art. For example, can you use it? In order to save time for memories, before going to bed, waiting for the bus, walking on the road and so on. We can recall the lessons of the day section by section, so that we can learn them again and again and achieve the goal of strengthening. Some physics problems are more difficult, and some problems may be solved on foot. People who study physics often have several problems in their minds that they can't do and won't forget. I don't know when they will make a breakthrough and find the answer to the question.
(8) learn from others. We should learn from others with an open mind, from our classmates, from people around us, see how others learn and keep in touch with them. Academically? Communicate, teach and learn from each other, make progress together, and never be self-righteous. Cann't be conservative Tell others if you have a good method, so that others will tell you that you have a good method. You should have some good friends in your study.
(9) Knowledge structure. We should attach importance to the knowledge structure, master it systematically, and systematize scattered knowledge. From the whole knowledge structure of physics to the knowledge structure of mechanics, even to chapters.
(10) Mathematics. The calculation of physics depends on mathematics, which is too important for learning physics. Physics is difficult to do without mathematics as a calculation tool. In the physics department of the university, mathematics and physics are equally important. To learn mathematics well, we must make good use of this powerful tool.
Some suggestions on learning chemistry well
1. Basic concept? Shielding . This piece includes five knowledge lines (or small systems), such as material composition and classification line, property change line, chemical terminology line, dispersion system line and chemical quantity line.
2. Basic theory? Shielding . This piece includes structure theory (atomic structure, molecular chemical bond theory, crystal structure theory) and periodic law of elements, synchronous surface line, electrolyte solution (including redox theory) line, chemical reaction speed and chemical equilibrium theory line. Theoretical block is the soul of chemistry.
3. Knowledge of elements and their compounds? Shielding . This piece is the cornerstone of chemistry, which can be divided into metal lines and non-metal lines and unified in the periodic system.
4. Organic matter? Shielding . The core of this block is the line of hydrocarbons and their derivatives, with emphasis on structure and chemical properties, while structure is functional groups and chemical bonds directly related to functional groups.
5. calculation? Shielding . This piece runs through all parts of chemistry and needs to master basic types, problem-solving rules and problem-solving skills.
6. Basic experiment? Shielding . This piece fully embodies the characteristics of chemistry. Including instruments, basic operation, preparation, identification (determination), purification, quantitative experiment, reagent storage, accident treatment, etc.
Skills of learning physics well
Listening to lectures is a commonplace topic. Some students go out to play when they see others after class, play games at home on holidays, or go out to play with friends. And I have been doing my homework in my spare time since class began. Why do others study so hard and win at last? Because others are efficient in class, although the class time is only 40 minutes, what everyone does in these 40 minutes can be completely different. Some people are in their hearts, and in Korea, some people write down the theorem that the teacher said, and then continue to think about what this theorem can give us to test. What are the traps? But if you want to get high marks, you usually need to do more exercises.
To cultivate interest in physics, Einstein said: interest is the best teacher, which can stimulate people's creative enthusiasm, curiosity and thirst for knowledge? . If you are interested in physics, you will get twice the result with half the effort. Reading more biographies and short stories of physicists will also enhance your confidence and interest in learning physics.
To learn mathematics well, physics is a subject that needs to be understood and calculated. Mathematical knowledge plays an important role in physics.
To review in time, it is best to learn the knowledge points taught on the same day by yourself that night, which will get twice the result with half the effort and be more impressive. This is much better than not reviewing at ordinary times and reviewing for the exam.
Ask if you don't understand. If you still don't understand after class, ask the teacher and classmates after class. Solving problems in time is the best choice.
Don't be nervous during the exam, believe that your efforts will pay off, and don't think too much. Do it first, do it first Pay attention to literal interpretation rather than pure formula when answering questions. If you can't choose either, you can only choose the one you are sure of. Just pay attention to logical reasoning.
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