What should I pay attention to in junior high school physics, precautions and skills for high school

In the Physics Exam for the High School Entrance Examination, here are some precautions and tips for moderation that I hope will help you: familiarize yourself with the syllabus and syllabus, understand concepts and principles, practice questions and exercise sets, exam tips and common mistakes.

1. Familiar with the syllabus and syllabus.

Understand the key points of the exam, clarify the scope of knowledge and skills, so as to review and prepare for the exam in a targeted manner.

2. Understand concepts and principles.

Physics is a highly theoretical subject that focuses on understanding concepts and principles, rather than memorizing formulas and conclusions. By analyzing the relationship between principles, formulas, and examples, it is possible to better understand and apply physics knowledge.

3. Practice questions and exercise sets.

Improve your problem-solving skills and speed by doing a lot of exercises, especially for different types of problems. Understand the requirements of the problem, analyze the steps of solving the problem, and pay attention to the calculation process and the rational use of units.

4. Exam skills and common mistakes.

Master some common exam skills, such as quick review of questions, reasonable choice of answers, etc. At the same time, pay attention to common mistakes, such as calculation errors, unit errors, careless negligence, etc., to avoid losing points on simple questions.

Preparation for the high school entrance examination:

1. Make a reasonable preparation plan.

Make a detailed preparation plan and plan your time, including daily study time, revision content, and breaks. Make sure the plan is feasible and adjust it to your situation.

2. Familiar with the exam requirements and syllabus.

Learn more about the test subjects, test format, assessment content and test requirements of the high school entrance examination, so that you can prepare for the exam in a targeted manner.

3. Systematically review knowledge points.

According to the syllabus and textbooks, systematically review the knowledge points of each subject. For key and difficult points, it is necessary to focus on strengthening understanding and memorization.

4. Do more questions and mock exams.

Do a lot of exercises and mock papers to consolidate your knowledge and improve your test-taking ability. By doing questions, you can exercise your problem-solving ideas, familiarize yourself with the exam format and test your learning effect.

Preparation for the high school entrance examination is not only the pursuit of scores, but also the cultivation and improvement of comprehensive ability. In the process of preparing for the exam, it is necessary to pay attention to the cultivation of thinking, the mastery of learning methods and the cultivation of independent learning ability.

1. Pay attention to the use of balances and graduated cylinders in density experiments.

2. Gravity, electromagnetic induction, Oster test, motor principle. Note: The above experiments are to be concluded by observing the effects on the object.

3. Attention should be paid to the range of the selected electric meter, the positive and negative binding posts of the electric meter, the protection circuit (series sliding rheostat), the voltmeter in parallel, the ammeter in series, and the switch before connecting the circuit is disconnected.

I started to learn physics in junior high school, everything is difficult at the beginning, and if I want to learn junior high school physics well, I would like to give you some advice for junior high school students.

First, the concept should be clear, the law should be familiar, and the basic methods should be proficient. The textbook must be familiar, the knowledge points must be remembered clearly, at least to achieve a clear impression of the illustrations in the textbook, and be able to quickly find the corresponding knowledge points of Kenben, which is about what the knowledge points are, what phenomena are demonstrated, what conclusions are obtained, and can be extended and comprehended.

2. Complete a certain amount of homework independently. It is necessary to do some questions independently (meaning not relying on classmates and teachers) and with quality and quantity. There should be a certain number of questions, not too few, but also a certain quality, that is, a certain degree of difficulty.

Solving problems independently, sometimes slowly, sometimes detours, sometimes even unable to solve them, but these are normal and the only way for any beginner to succeed. It will be fruitful to know the topics that you don't know and expand your knowledge and memorize them.

3. Pay attention to the physical process and attach importance to auxiliary mapping. Whether it is a theoretical process or a practical process, there is inevitably a hidden danger of solving problems if the physical process is not clear. Regardless of the difficulty of the problem, you should try to draw a picture, some can draw a sketch, some need to draw an accurate map, and use a compass, triangle, protractor, etc., to show the geometric relationship.

Drawing can transform abstract thinking into figurative thinking and grasp physical processes more precisely.

Fourth, listen attentively. Listen carefully in class and not get distracted. Don't give up listening to the lecture because the teacher is simple, if this situation really occurs, it can be regarded as review and consolidation, try to be consistent with the teacher, synchronize, and learn the norms.

If you have a different opinion, you can't discuss it with the teacher after class, otherwise it will be tantamount to complete self-study.

5. Stick to note-taking. The class is mainly based on listening to lectures, and there is also a notebook to write down some things. Knowledge structure, good problem-solving methods, good example problems, and things that you don't understand well should be memorized.

After class, I also have to organize my notes, on the one hand, to "digest well", and on the other hand, to supplement my notes. The notebook is not only to remember what the teacher said in class, but also to make some excerpts, and to record the good problems and solutions found in the homework in the notebook, which is what students often call "good question books". The notebook that you have worked so hard to build up should be numbered, and you should read it often in the future, and you must be able to love it.

6. Organize your study materials. Study materials should be well preserved, classified, and marked. The classification of learning materials includes practice questions, test papers, lab reports, etc.

Marking means, for example, marking practice questions, good questions, valuable questions, and easy-to-mistake questions, such as * and ?etc., for future review, marking can save a lot of time.

A complete set of physics comprehension skills in junior high school.

1. Electrical part:

Tips for judging whether an object is charged or not.

If two objects are attracted to each other. Then there are two types of electrified objects: loose hands.

All are charged and have a heterogeneous charge;

One is electrified, one is uncharged;

If two objects repel each other. Then the objects are charged and have the same charge.

Tips for judging the part of the rheostat connected to the circuit:

If it is a structural diagram, the part between the sliding vane and the lower wiring punch imitation column is the part connected to the circuit;

In the case of a circuit symbol diagram, the part through which the current flows is the part that is connected to the circuit.

Tips for judging the values measured by series and parallel circuits and voltmeters and ammeters:

Remove the voltmeter first, and look at the ammeter as a wire, 2).

There are several current paths in the circuit, if there is only one path, it is in series; Otherwise it is parallel;

Starting from the positive pole of the power supply, see who the ammeter is connected with in series, and it will measure the current value of whom; Looking at voltage.

Whoever the table is connected in parallel with, it measures the voltage value at both ends.

The gauge moves with the sliding vane of the sliding rheostat and causes a change in the number of electrical representations.

Law. Big reed. 1) If it is a series circuit.

Here's how:

First, the change of the resistance of the sliding rheostat is judged according to the movement of the sliding vane.

The characteristics of the circuit determine the change of the total resistance in the circuit, according to Ohm's law.

i=u/ru

It is judged by all means that the electricity is generated.

The change in the total current in the path (i.e., the change in the ammeter).

Indication of voltmeter.