Solution analysis: to solve the inquiry questions, we must deeply understand the physical laws in the textbook and know them like the back of our hand, so as to be foolproof about the basic inquiry questions; The second is to master the method of inquiry, understand the whole process of inquiry (seven steps), and skillfully use various inquiry methods such as "controlled variable method", "equivalent substitution method" and "analogy method" to answer questions constantly.
I hope that students will carefully read the exploratory experimental questions of physics answering skills in the senior high school entrance examination and strive to improve their academic performance.
In the physics examination of senior high school entrance examination, there is a topic that we must attach great importance to, and this topic is physics experiment exploration. For such problems, all of us must carry out intensive training, and only in this way can we improve our grades. Then, experts in university education will bring you the answering skills of the physics experiment inquiry questions in the senior high school entrance examination.
Experimental inquiry questions: the comprehensive requirements of the test sites are strong.
There are three questions in the experimental exploration, among which, material 17 points and motion and interaction 44 points. The question type of the last question is also relatively novel, and the basic mass density and Archimedes principle formula are investigated. The main reason for the error is that the connection cannot be found.
Generally speaking, the physics test questions in Guangzhou senior high school entrance examination focus on basic knowledge, and the questions are novel, which improves the comprehensive ability of candidates!
Knowledge point: the change of state
True question (15): After dry ice (solid carbon dioxide) is put into an aluminum can for a period of time, a layer of frost forms on the outer wall of the can, as shown in figure 10. This layer of frost is caused by _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _. In the cold winter, when the doors and windows of crowded cars are closed, water vapor will liquefy into small water droplets and attach to the glass windows. Water vapor will become water droplets _ _ _ _ _ _ _ _ _ _ (choose "will absorb heat", "will release heat" and "will not absorb heat or release heat"), and water droplets will appear in _ _ _ _ _ _ _ _ _ _ _ _ _.
Analysis: This question mainly examines the knowledge points of state change. When the temperature of the aluminum can filled with dry ice is very low, the water vapor in the air will turn into frost when it touches the aluminum can; The change of water vapor into water droplets is a liquefaction process, which will release heat; If the temperature inside the car is high, the temperature outside the car is low and the temperature of the window is low in winter, the water vapor inside the car will liquefy into "water droplets" when it meets the cold window glass.
This topic mainly investigates the process and conditions of material state change.
Knowledge points: watt-hour meter, Joule change, state change.
True question (question 2 1): Xiaoming connected two electric heating rods, R 1 and R 2, to the lighting circuit with constant voltage of 220V through two electric meters with the same specifications. Each turn of the dial of the electric energy meter shows a power consumption of 5000J J J. As shown in Figure 20, R 1 and R 2 respectively heat the water with the same initial temperature and mass in beakers with the same specifications to 80℃.
(1)R 1 How much power does it consume when powered on?
(2) What is the electric power of r1?
(3) What is the resistance of r1?
(4) The electric energy consumed by heating two glasses of water should be the same, but according to the experimental data in the table, the electric energy consumed by R 1 is different from that consumed by R 2. Please analyze what causes R2 to consume more electric energy than R 1?
Prepare suggestions:
Analysis of specific problems in 1. time planning
We know that the physics of the senior high school entrance examination is mainly divided into four parts: mechanics, electricity, heat and optics. The proportions of these four parts are: mechanics accounts for about 40%, electricity accounts for 35%, and light and heat accounts for about 25%. The distribution of scores in the senior high school entrance examination is basically the same, and the questions in the senior high school entrance examination are concentrated. Generally speaking, there is no problem in optics and heat, but it is the basis of students, and the most difficult questions are basically in mechanical and electrical parts. Of course, each student's learning situation is different and his grades are different. Therefore, before reviewing, we must be clear about our weaknesses in learning physics and be prepared. For example, which part of power, heat, light and electricity has not been studied well, then review this part emphatically. If you feel the current,
You study well, but you are afraid of troubleshooting, so this is your weakness. This kind of exercise should be done and analyzed until it is learned. If some students are afraid of power comprehensive questions, then find some power questions in the middle school entrance examination questions in previous years to strengthen training, find rules, find methods and find ideas until they are overcome.
2. There are always more answering skills than asking questions.
1. To do multiple-choice questions, you should not only be able to choose the correct options, but also give reasons, not by feeling, but through certain logical reasoning or process, that is, there are reasons for right and wrong, so as to achieve four questions in one question and achieve twice the result with half the effort!
2. Fill in the blanks and draw the questions. Be sure to examine the questions carefully. The answer text should be as real and accurate as possible. Remember to be vague! In particular, I would like to remind you that arm exercises are similar to almost every year's exam questions.
3. To analyze the problem, we should first read through the problem and draw data or key conditions (such as the series and parallel connection of electricity, the relationship between components, etc.). ) in the question, then analyze the process, and finally write a simple text description and formula according to the analysis process, and substitute the data to give the answer. It should be reminded that the company (one company is 1, and the total score is 1, which may be whether the ideal school can go on smoothly 1) must follow the data. After substituting the data, don't write the calculation process on the answer sheet (it is not required to write the calculation process in the physics exam, if it is wrong, it will not be added if it is right).
4. Experimental inquiry questions, in the review stage, we should strengthen the training of the ability to examine questions, especially the ability to understand and express words, and must not mechanically copy the experimental rules; When encountering design experiments or experimental error analysis questions, we should fully combine experimental principles and formulas, analyze the process, and answer as required.
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