Science Integration, including Physics and Chemistry

Law of Conservation of Mass: In a chemical reaction, the sum of the masses of the substances before participating in the reaction is equal to the sum of the masses of the substances formed after the reaction. This law is called the law of conservation of mass.

The law of conservation of energy: energy is neither created nor destroyed out of thin air, it can only be transformed from one form to another, or from one object to another, and in the process of transformation or transfer, the total amount of energy remains the same. The law of conservation of energy is now widely recognized.

1) Different forms of energy in nature correspond to different forms of motion: the motion of objects has mechanical energy, the motion of molecules has internal energy, the motion of electric charges has electrical energy, the motion inside the nucleus of an atom has atomic energy, and so on.

2) Different forms of energy can be converted into each other: "Frictional heat generation is the conversion of mechanical energy into internal energy by overcoming friction and doing work; When the water in the kettle boils, the water vapor does work on the lid of the kettle to lift the lid up, indicating that the internal energy is converted into mechanical energy; The electric current does work through the heating wire, which converts electrical energy into internal energy, and so on." These examples illustrate the process by which different forms of energy can be converted into each other and by doing work.

3) If the energy of a certain form decreases, there must be an increase in the energy of other forms, and the amount of decrease and increase must be equal The decrease in the energy of a certain object must have an increase in the energy of other objects, and the amount of decrease and increase must be equal.

Conservation of energy includes conservation of mass.

In fact, a large part of learning depends on interest, if you are not interested in a subject.

Even if it forces you. You may still not be able to learn.

If you are still interested in this subject, then you should study it well.

Listen carefully in class.

I won't ask the teacher.

Don't be afraid of what the teacher says about you.

Even if it's a simple question, the teacher will tell you and know that you understand.

The comprehensive science includes three subjects: physics, chemistry and biology, referred to as "science and science". Trembling stool rises.

The comprehensive score of crude and dry science is 300 points, of which the scores of each individual subject vary from province to province, and the national science comprehensive paper is 110 points for physics, 100 points for chemistry, and 90 points for biology. In recent years, the proportion of biology in the physical synthesis has been increasing, almost close to the physical and chemical score, and the other sometimes has slight changes from year to year. Such a reform plan for the subject setting of the college entrance examination is intended to guide middle school students to develop in a balanced manner, but also to highlight their personality and strengths, and to alleviate the common shortcomings of bias in middle schools.

Science is a science synthesis composed of physics, chemistry, and biology, and "comprehensive" is "science comprehensive".

The total score of the comprehensive science test is 300 points, of which the scores of each individual subject vary from province to province, and the national science comprehensive paper is 110 points for physics, 100 points for chemistry, and 90 points for biology.

1. Physics: It is a natural science that studies the structure of matter, the interaction of matter and the law of motion.

2. Chemistry: It is a natural science that studies the composition, structure, properties and changes of matter at the atomic and molecular scales.

3. Biology: It is a science that studies the structure, function, occurrence and development of organisms, as well as the relationship between organisms and the surrounding environment.

The perfect score for the high school graduation exam is 300 points. Students who are not proficient enough to master and familiarize themselves with basic knowledge and are not strong enough to solve problems will have a test score of about 150 points. Middle school students with good attitudes and habits should be able to score about 180 points, which is normal, but this is only a passing grade.

Excellent students, assuming that they want to be admitted to a first-class university with excellent grades through hard work, must score 225 points or higher, and can be considered normal.

Science comprehensive is science comprehensive, and the full score of general science comprehensive is 300 points, as long as the exam reaches 180 points, you will pass. Science comprehensive covers three courses, these three courses are biology, physics and chemistry, in the three years of high school to choose science comprehensive, you must study hard, and strive for a high score in the high school graduation examination science comprehensive, which is of great help to be admitted to a good university.

The results of individual subjects are different in each region, but the full score is 300, so the full score of 180 is passed, and each subject is considered to pass as long as it reaches 60% of the full score of a single subject.

What is the trick to learning science well

Science candidates may have a partial difference in Chinese and English, so you can focus on these two subjects, which will distance us from others.

In science, the priority to concentrate on is the accuracy of the results, and on weekdays, you should exercise your arithmetic ability more, so that you can have an advantage in calculations. We have to give ourselves a hint in our hearts that science is not super difficult, we must take the initiative to learn, don't wait for the teacher to let you learn, in most cases, people who study well will take the initiative to learn.

Some courses assume that you can't keep up, so you can go to a cram school and try your best to improve your grades. Be sure to use your brain more, take the initiative to accept the knowledge you want to learn from your heart, and assume that you feel that your mood is very irritable, and give up learning first.

It consists of three subjects: Physics, Chemistry and Biology.

First, the concept of rationalization.

The Science Comprehensive Ability Test, referred to as "Science Comprehensive" or "Science Comprehensive", refers to the combination of physics, chemistry and biology in the old college entrance examination. The total score of the comprehensive science test is 300 points, of which the scores of each individual subject vary from province to province, and the national science comprehensive paper is 110 points for physics, 100 points for chemistry, and 90 points for biology.

2. Overview by subject.

1. Physics

Physics is a natural science that studies the structure of matter, the interaction of matter, and the laws of motion. It is an experiment-based natural science, and one of the eternal themes of physics is the search for orders, symmetry, symmetry-breaking, conservation laws, or invariance.

Actual physical phenomena and laws are often complex and involve many factors. Discarding the secondary factors and grasping the main factors, so as to highlight the essential characteristics of objective things, is called building a physical model. The essence of physics is to establish a physical model for the research object, study the model through mathematical tools, and then explain and ** the research object.

Physical models (schematic diagrams), physical formulas (mathematical symbols), physical laws (textual descriptions), physical images (images of functions between two physical quantities), and physical explanations (physical meanings) together constitute the basic manifestations of physical knowledge, which are all important components of physical language.

2. Chemistry.

Chemistry is a natural science that studies the composition, structure, properties, and changes of matter at the atomic and molecular scales. Industrially, chemical reactions can be used to develop and prepare compounds with novel effects that do not exist in nature.

Different from particle physics and nuclear physics, which study smaller scales, the basic properties of elements, chemical bonds, molecules, and ions (clusters) studied in chemistry are the microscopic natural laws that are most closely related to matter and materials in the macroscopic world of human existence. The universe is composed of matter, and as an important bridge between the microcosm and macrocosm of the material world, chemistry is one of the main methods and means used by human beings to understand and transform the material world.

3. Biology.

Biology is a category of natural sciences, known as a category of natural sciences that studies the structure and function, occurrence and development of organisms, as well as the relationship between organisms and their surroundings. Biology originated from naturalism, experienced experimental biology, molecular biology and entered the period of systems biology.

The main branches of high school biology include: biochemistry, molecular biology, cell biology, genetics, embryology, neurobiology, immunology, morphology, ecology, modern biotechnology, etc.

The score is as follows: 120 in Physics, 108 in Chemistry, and 72 in Biology

Alas. Fortunately, I studied science, and if I asked about the score distribution of Wen Zong, I really don't know.

The score of Zhejiang Li Comprehensive is as follows: 120 in Physics, 100 in Chemistry, and 80 in Biology

Science is relative to liberal arts, science courses are more focused on mathematics, physics and chemistry, and liberal arts are more important than history, politics, and geography. Science comprehensive means that in the college entrance examination, physics, chemistry, biology, and three subjects are combined into one test paper, which is called a comprehensive paper.

All the subjects of science in the college entrance examination are mathematics, Chinese, English, and science, and the science and science comprehensive includes physics, chemistry and biology, which is equivalent to the test paper of the science and science comprehensive subject, which contains the questions of 3 subjects.

The science exam should be a comprehensive science subject, and there are three courses in science: chemistry, physics, biology, and these three subjects are collectively called science comprehensive!

Science includes science comprehensive! In order to study science, you must study comprehensive science subjects (physics, chemistry, biology) plus language and mathematics.

Science synthesis is a form of examination, that is, physics, chemistry, biology, and one paper exam.

Science is an overarching form of specialization that is different from liberal arts, and there is also a science major.

Science, Physics, Chemistry, Biology, Liberal Arts, Geography, History, Politics, Language, Mathematics, and English should be learned, while science is more thoughtful, rational, and more difficult, and liberal arts are more difficult to understand and memorize.

After going to college, you can choose a science major to choose depending on your interest in that area.

What you asked is very good and powerful, science is to train people's logical reasoning ability, and science is simply a tool for selection exams!

Some of the volunteers you rank based on your score after reaching their school's cut-off score.

Physicochemistry is physicobiochemistry.

Science is a science that includes science. Plus language, English, information technology.

Science synthesis is a paper that includes physics, chemistry, biology, and science, which is a type of science.

Physics, chemistry, biology, etc. belong to the sciences.

Putting them all together is a science synthesis.

To study science, you need to take the comprehensive examination of science. It is enough to apply for the exam, and the score for science and liberal arts is different

Biochemical Physics.

Science is a subject.

Science synthesis is a volume.

Science is the integration of science.

Science is Chinese and mathematics. English. Chemistry. Physics. Creature. Six Disciplines

Science synthesis refers to the three subjects of physics, chemistry and biology.

B. Khan: That's the question.

Science is a division of disciplines, that is, the division of arts and sciences.

Physics, chemistry, and biology are the same volume.

Science synthesis is to put physics, chemistry, and biology in one paper.

Science, physics, biology, and chemistry are all taken separately.

Science synthesis is to combine the knowledge of these three subjects together and take the test on one test paper.

The science you are talking about should be science and engineering, compared with science, science is more theoretical research, science and engineering are more practical application!

Science: Chinese, Mathematics, English, Physics, Chemistry, Biology.

Physics, Chemistry and Biology.

: due to the reaction.

2h2c2o4+2kmno4=k2mno4+mno2+2h2o+4co2

The resulting Mn2+ can catalyze the reaction (discussed in the chapter on chemical reaction rates), so the reaction is slow at first, but as the catalyst is generated, the reaction becomes faster, and later the reactant concentration decreases, and the reaction slows down;

B: From the point of view of the balance movement.

2CRO4 2- (yellow) +2H+ = reversible) CR2O7 2- (orange) +H2O

The chromate is yellow and the dichromate is orange.

Acid is added, the equilibrium shifts to the right, and the solution changes from yellow to orange;

C: Since the catalyst is different here, the concentration of reactants (hydrogen peroxide) is also different, and there is no control variable, and the results obtained by the reaction cannot be determined whether the reactant concentration or the catalyst is determined, so the catalytic effect cannot be confirmed;

D: According to the conversion of the white precipitate to the yellow precipitate, it can be concluded that AgCl can be converted into Ag2S with less solubility;

Because the dissolved iodine element of carbon tetrachloride shows purple red, i3-=i2+i- forms a reversible equilibrium in water, and part of the iodine element in the carbon tetrachloride extraction solution makes the balance shift to the right, and the carbon tetrachloride is continuously extracted, so that the equilibrium is constantly shifted to the right, and the solubility of i3- itself in carbon tetrachloride is very small;

B: According to the reaction, CH3COOH+OH-=CH3COO-+H2O

k=c(ch3coo-)/ch3cooh)c(oh-)

This value is the k value of the reaction, which will only change with temperature, and changing pH will not change this value;

C: Due to NAF, CH3Cook are both strong electrolytes and completely ionized; So the concentrations of Na+, K+ are equal;

It is only necessary to compare C(F-) and C(CH3CoO-) due to the large ionization constant of hydrogen fluoride, it is more acidic, the ionization is more complete, and the corresponding degree of salt hydrolysis is smaller, so C(F-)>C(CH3CoO-); Since the concentration of Na+, K+ is equal; -c(f-)c(na+)-c(f-)d: conservation according to the post-reaction charge.

c(nh4+)+c(h+)=c(oh-)+c(cl-)

Since c(NH4+)=c(ci-), c(oh-)=c(h+); According to c(h+)c(oh-)=10 -14,;

c(oh-)=c(h+)=10^-7；

nh3·h2o=nh4++oh-;

k=c(nh4+)c(oh-)/c(nh3·h2o)

c(oh-)=10^-7mol/l;

Since it is an equal volume mixing, the chloride ion concentration becomes half of the beginning after the reaction; Nitrogen is also half of its original amount;

c(nh4+)=c(cl-)=;

c(NH3·H2O=C(Total N)-C(NH4+)=A;

Substituting k=10 -9 (;

If you have any questions, please ask!