What did you learn about chemistry through the junior high school chemistry course?

I think that because of the relationship between not working hard, a certain Wu has achieved very good results in chemistry. In fact, junior high school chemistry is very simple, basic and close to daily life, chemistry is not just a useless subject extended from the examination-based education system, on the contrary, learning chemistry, you can find more unknown objects of interest in life, and a little bit back is very helpful to daily life, such as buying food, pesticides and so on. Laugh.

Also, people are made up of chemical elements.

Chemistry, as a major discipline and the general direction of research-oriented learning, is naturally innumerable and related to the development of human beings and a better life. Everything is everywhere. Hate.

Chemistry is important, but to be honest, I'm not that interested in chemistry. But Guangguang can't survive with interested people. Therefore, I think that those who are interested can rely on their own interests to conduct research experiments, and if they are not interested, it is best to focus on the key points.

Interest doesn't have to be cultivated reluctantly.

When it comes to chemistry, many people think of doctors. In fact, as a doctor, the relationship with chemistry is not particularly close, (parents who have no home are doctors) should be a pharmacist. For example, orthopedic stretching and dental plastic surgery should be directly implicated in physical mechanics.

Back to the body. Pharmacists are basically involved in the composition of the human body in chemistry, in which Chinese medicine and Western medicine are not quite the same, and it is difficult to say that even if you have just graduated from junior high school. I'm part of a huge team of fans.

It must be Ha Alchemist's. However, I don't know if there is such a profession now.

Complete. Presented

The landlord is going to do his chemistry homework in the first year of high school. It just so happens that we're going to do it too. I changed my homework a little. No duplication, no resemblance. It can definitely be used.

After a year of studying in junior high school, I already have a general understanding of chemistry. Chemistry is an experimental discipline based on experiments, which is a natural discipline that studies the composition, structure, properties, changes, preparation and application of matter at the atomic and molecular levels. It is a discipline that involves a wide range of subjects, rich in content, and is closely related to life.

Among the many fields involved in chemistry, I prefer the study of "utilization and degradation of harmful substances". To study this problem, we need to use a lot of chemical knowledge, through continuous experiments and exploration. Therefore, I believe that the study of this problem can best exercise our chemical literacy.

And this is a problem closely related to our lives, and it is also the most serious problem facing mankind at present, if there can be a breakthrough in this field, it will make an immeasurable contribution to mankind.

Among the many professions related to chemistry, my favorite is the pharmacist, who needs to understand the composition and chemical use of each drug, as well as the characteristics of various cases and medical methods, so that he can prescribe the right medicine, which is a profession that requires a high level of chemical literacy.

I don't know what the landlord's intentions are, so I'll tell you.

Chemistry in junior high school I think it's relatively simple, but it's very interesting to learn. I also like chemistry very much, and I don't know the main reason, but I think it's very interesting, and I have put a lot of effort into chemistry, although I haven't figured out what I can do in the future.

The role of chemistry is very large, in my own opinion, the development of science and technology is ultimately the development of new energy and new materials, and chemistry is precisely the study of this aspect, my own idea is to find a job related to my favorite subjects, happy life, now I know that the profession related to chemistry is probably a doctor, doctors are not bad hehe.

That's all

The English expression of the junior secondary subjects is:

1. Chemistry

2. English English

3. Physics

4. Art

5. History

6. Chinese Chinese

7. Political polity

8. Physical Education (9. Math

10. Geography

11、** music

There is no chemistry, which is a subject offered in the ninth grade.

The main subjects in the second year of junior high school are: Chinese, Mathematics, English, Geography, History, Politics, Biology and Physics.

The curriculum that runs through the three years of junior high school includes: Chinese, Mathematics, English, Ethics and the Rule of Law. Physics will be taught in the eighth grade, and Chemistry will be taught in the ninth grade.

Sub-subjects include: Physical Education, **, Fine Arts, Information, etc.

The chemical origin theory divides the origin of life into four stages.

The first stage.

The stage of generating organic small molecules from inorganic small molecules, i.e., the process of chemical evolution of the origin of life, was carried out under primitive terrestrial conditions. It is important to note Miller's simulations. In this experiment, a flask containing an aqueous solution represents the primordial ocean, and its upper spherical space contains a "reducing atmosphere" of hydrogen, ammonia, methane, and water vapor.

When Miller analyzed its chemical composition, it found that it contained a variety of new organic compounds, including 5 amino acids and different organic acids, while also forming cyanogenic acid, which can synthesize adenine, which is the basic unit of nucleotides.

Miller's experiments and diagrams proved that the first step in the origin of life, from inorganic small molecule matter to organic small molecule matter, was completely possible under the conditions of primitive earth.

The second stage.

Biological macromolecules are generated from small organic molecules. This process occurs in the primordial ocean, that is, amino acids, nucleotides and other small organic molecules, after long-term accumulation, interaction, under appropriate conditions (such as the adsorption of clay), through condensation or polymerization to form primitive protein molecules and nucleic acid molecules.

The third stage.

A multi-molecular system is composed of biological macromolecular substances. How did this process come about? The former Soviet scholar Obalin put forward the agglomerate hypothesis, and he experimentally showed that when proteins, peptides, nucleic acids, gelatin, gum arabic and polysaccharides are placed in a suitable solution, they can automatically concentrate and aggregate into dispersed globular droplets, which are aggregates.

The fourth stage.

Organic polymolecular systems evolved into primitive life, including the birth of cells marked by the establishment of biochemical and genetic systems. This stage was formed in the primordial oceans and was the most complex and decisive stage in the origin of life. At present, it is not possible to verify this process in the laboratory.

There is chemistry in the third year of junior high school.

Hope to help you.

There are two main methods in the development of chemistry, one is induction and the other is deduction.

The best learning method for junior high school chemistry is to memorize, followed by comprehension, conditional operation, observation, and induction.

How to learn chemistry well in junior high school? What are some good ways to learn?

Unexpectedly, the three years of junior high school passed immediately. Looking back. I still miss it.

I sorted out some volumes and some books at home, and there were a lot of them. And the high school entrance examination is not as scary as everyone thinks. It was just a simple exam, and then the three years of junior high school were over.

In the third year of junior high school, how many reference books and how many volumes we turned over. Just for this exam. So, now I'm going to tell the soon-to-be junior high school students how to learn chemistry well.

Experimental setup. Well, let's not say these useless words. Actually, my chemistry level is not very high, but I hope that students who are about to enter the third year of junior high school can also have some of their own learning methods when studying chemistry, I hope it will help you.

First, it is necessary to make the examination of the topic clear.

This sentence seems to be nonsense, but many people know this, but they can't do it. In fact, this is the basis of the question, you have to clarify the conditions given in the question, and then make the answer. In the high school entrance examination, I often feel sad because I didn't get the basic score.

The second is to memorize the law of conservation.

The laws in chemistry tend to look the same and seem to be useless, but they tell you that this is a concept that you have to remember, and that you can use it when you do a math problem. And when writing chemical equations, you must be conserved, otherwise you will be wrong in this question. Therefore, please remember the law of conservation and memorize it to the death.

The third is to find the cause.

The fourth is to read more chemistry books outside of class.

The fifth is to lay a good foundation, which is the foundation of all knowledge.

The foundation is learned from the beginning of junior high school, the foundation is the foundation of all knowledge, it is very important for how to learn junior high school chemistry well, if there is no foundation, you can't improve your grades later, so the foundation is very important. There's not much to say, just be sure to memorize the basics.

Students do experiments.

The sixth is to stick to the experimental problem.

As for the experiment, the first point is to consider the problem of excess, and the second is to consider the gas when inhaling, and after passing through the liquid, a trace amount of liquid will definitely be brought out, such as water. The third is to grasp the reaction phenomenon and so on. The fourth is to be environmentally friendly and efficient, and the fifth is to remove impurities cleanly, and no new impurities can be introduced.

The above is about how to learn some methods of junior high school chemistry, a total of six points, please remember that these are prepared by your predecessors, I hope you can be admitted to your ideal high school!

Junior high school chemistry is a course that students have just come into contact with, so it should strengthen the foundation and arouse students' interest in learning, start with experiments, and the existence of chemistry in life, and let students feel that chemistry is inseparable from life, so that they can arouse students' interest in learning, and at the same time pay attention to the correct learning of basic knowledge such as basic terms and chemical language and instrument names, so as to add a good foundation for the back

My feeling is that the concepts in junior high school chemistry are very simple and incisive, so simple that you can understand it after reading it, and it is so incisive that there are only a dozen words, but when it is really used in actual combat (doing problems), it still can't. Take a look at the answer, people have been talking for a long time, and they will still give you the answer around the concept. Finally, after doing some more questions, I finally understood that every word in the concept, even every word, has its use.

It can be said that only by doing some related questions can the concept be truly integrated. The exercises are very simple, and you won't need to look at the answers. In fact, it is all about explaining the concept, and then when you do other problems, you will use this concept to solve the ever-changing problems.

It is not recommended to do more on other reference books. Good luck!