The physics concept of the second year of junior high school should be complete, and the content of

Volume I (mainly learning the basics of acoustics, optics, heat, and electricity) Chapter 1 Acoustic Phenomena.

1. Sound generation and propagation.

2. How do we hear sounds?

3. Characteristics of sound.

Fourth, the harm and control of noise.

5. The use of sound.

Chapter 2 The Phenomenon of Light.

1. The propagation of light.

2. Reflection of light.

3. Plane mirror imaging

Fourth, the refraction of light.

5. Dispersion of light.

6. Invisible light.

Chapter 3 Lenses and Their Applications.

1. Lens. Second, the lens of life.

3. The law of convex lens imaging

4. Eyes and glasses.

5. Microscopes and telescopes.

Chapter 4 Changes in the state of matter.

1. Thermometer.

2. Melting and solidification

3. Vaporization and liquefaction

Fourth, sublimation and condensation

Chapter 5 Currents and Circuits.

1. Charge. 2. Current and circuit.

3. Series and parallel

Fourth, the strength of the current.

5. The law of current in series and parallel circuits

Volume II (Mainly Electrical).

Chapter 6 Voltage and Resistance.

1. Voltage. Second, the law of series and parallel circuit voltage

3. Resistance. Fourth, the rheostat.

Chapter 7: Ohm's Law.

1. The relationship between the current on the resistor and the voltage at both ends

2. Ohm's law and its application

3. Measure the resistance of the small bulb.

Fourth, Ohm's law and safe use of electricity.

Chapter 8 Electrical Power.

1. Electrical energy. 2. Electrical power

3. Measure the electrical power of the small bulb.

4. Electricity and heat

5. Electricity power and safe electricity consumption.

Sixth, the common sense of electricity in life.

Chapter 9 Electricity and Magnetism.

1. Magnetic phenomena.

2. Magnetic field. 3. Electromagnetism

Fourth, electromagnets

5. Electromagnetic relay speaker.

6. Electric motor

7. Magnetism generates electricity

Chapter 10 Transmission of Information.

First, modern tailwind ears **.

Second, the ocean of electromagnetic waves.

Radio, television and mobile communications.

Fourth, the road of information is getting wider and wider.

The above "" are the key points of learning that I personally think, I hope it can help you! ~

The first semester of the second year of junior high school: Chapter 1 Acoustic phenomena Chapter 2 Optical phenomena Chapter 3 Lenses and their applications Chapter 4 Changes in the state of matter Chapter 5 Electric currents and circuits.

Second Semester of Junior High School: Chapter 1 Voltage and Resistance Chapter 2 Ohm's Law Chapter 3 Electrical Power Chapter 4 Electricity and Magnetism Information Transmission.

Hope you can help you!! It's just the physics of the second year of junior high school, (*hee-hee......

The answer to the 2nd floor is so good that it's the standard.

Physics is actually not difficult, but it is more theoretical, don't be afraid of physics, and don't be too nervous. As long as you look at the score, otherwise you will be too nervous and you will not be able to review. If you are nervous, you will be afraid, physics is not difficult, so don't be nervous.

Everyone's foundation is different, and their learning attitude is different, so the methods to be adopted are also different. In order to learn well, you must find a learning method that suits you, and you must choose a suitable method according to your own characteristics. You can make progress.

The method of learning should be "a hundred schools of thought contending" and "a hundred flowers blooming". Start with the basics – familiarize yourself with the skills – apply. It must have been practiced countless times.

Understand the characteristics of the subject, memorize the formulas, think more, dig more and do more questions, there is never a shortcut to learning, only practice, practice, and practice.

To do a good job of four rounds of learning:

1.Fundamentals for a comprehensive review (see textbook).

2.Use the exam to test your first round of revision. Analyze the existing problems in detail, and do a good job of reviewing the gaps.

3.Review in sections. Do the same in the differences, the same in the differences.

The difficulty of physics in the second year of junior high school is mainly buoyancy in mechanics or density, as long as you can use the formula flexibly, you will be able to learn well and keep up with the teacher.

In the second year of junior high school, physics includes acoustics, optics, and electricity.

Mechanics and Thermals are both in junior high school.

Physics in the second year of junior high school is very important, especially electricity is very difficult, you must pay attention to electricity when you study, the others are quite simple, you have to make up for electricity!

There's it in the library, so go check it out.

Last semester: Acoustics Preliminary knowledge of sound Preliminary understanding of computational heat in physics Understand simple changes in the state of matter and be able to distinguish them.

Optics Learn about the propagation of light Preliminary understanding of the knowledge and laws of lenses and other knowledge Computational mechanics is not required Understand the simple definition of velocity Preliminary understanding of the calculation of physics Next semester: mechanics 1 Preliminary understanding of the definition of density Understand the calculations Understand the physical properties of matter.

2 Preliminary contact force Understand the basics of gravity, friction, elastic force, etc. 3 Understand the balance of forces and Newton's theorem of inertia.

Is it the human-taught version? If it's a people's education version, the entire second year of junior high school is electricity.

If it is the Beijing Normal University version, it is the change of state of matter, density, sound, speed, optical instruments, force and motion, pressure and buoyancy, machinery and work.

Hunger, as I understand it, is a certain movement carried out by non-living organisms, and the material of the object does not change when it moves. That astronomy should be clear... If you don't know, ask questions.