First, the association method
Communication is a creative activity. Lenovo can excite brain nerve cells and leave a clear mark on the cerebral cortex, so the memory is very strong. Persisting in using this memory method is helpful to develop imagination and cultivate creative spirit. For example, in the learning process of simple harmonic motion, students can't firmly remember the periodic formula T = 2π of a simple pendulum, and often write the positions of L and G backwards. Therefore, the shape of a simple pendulum can be associated with "L/g": the cycloid L is hung on it (write L above the corresponding fractional line) and the pendulum ball is hung below it (write G below the corresponding fractional line).
Second, the formula method
Using the physical meaning of formulas to remember physical concepts and laws can avoid mechanical memory and is quite convenient. ① Memorize concepts with formulas. For example, from the definition of electric field strength "e = f/q", we can understand and remember that "the ratio of electric field force f to the charge q put into the electric field is called the electric field strength at this point"; ② Using formulas to remember laws. For an ideal gas with a certain quality, the relationship among pressure, volume and temperature varies greatly, and it is complicated to discuss them one by one. If we remember the relationship of PV/T = C (constant), it is easy to grasp the changing law among these three parameters.
Third, observation and comparison methods
Observing and comparing is an important way to know things and an effective way to remember things. It can help us accurately identify memory objects and master their different characteristics for memory. For example, when memorizing the gravitational constant G = 6.67×10-1(nm2/kg2) and Planck's constant H = 6.63× 10-34 (JS), students often confuse and blur these two constants. If we carefully observe and compare, we can find that the first two digits of the two constants are both "6.6" and both are negative exponents. The word "7" with a gravitational constant of "6.67" can be associated with "force" and "7" through homonyms; The "3" of "6 .63" in Planck constant can be homophonically associated with "light" of "photon". As for the memory index "10- 1 1" and "10-34", the former consists of two "1", and the latter consists of two adjacent numbers "3" and "4", so we can remember them. In addition, if the vibration image and the fluctuation image are observed and compared together; Comparing the formula of universal gravitation law and Coulomb's law in form, both of them can achieve better memory effect.
Fourthly, Lenovo experiment (life case) method.
Using the plots and conclusions (or life cases) of demonstration experiments and students' experiments to connect with easily confused and forgotten knowledge can deepen the understanding and memory of knowledge. For example, in the process of learning free fall, students often think that the greater the gravity, the greater the acceleration of gravity, so we can refer to the famous "two iron balls landing at the same time" experiment to understand the knowledge of memory; In the learning process of "Overweight and Weightlessness", you can use the spring scale and hook code to demonstrate the changes of the scale numbers under the conditions of overweight and weightlessness, and use the plastic bottle containing water (with holes in the bottom and cap) to demonstrate the phenomenon that water does not flow out under the conditions of complete weightlessness, so that students can remember relevant knowledge in connection with these phenomena; After learning the law of resistance, students are prone to make mistakes in the influence of conductor length and cross-sectional area on resistance. We can analyze the situation that the filament of incandescent lamp is broken, the filament resistance becomes smaller and the bulb becomes brighter after reconnection, which not only stimulates interest, but also deepens understanding and memory.