8.4《机械能及其转化》说课稿（8.4, mechanical energy and its transformation lesson notes）.docVIP

8.4《机械能及其转化》说课稿（8.4, mechanical energy and its transformation lesson notes） 8.4 releases and the conversion of mechanical energy 1, curriculum requirements: 1 through this chapter of teaching, let the students to understand the concept of kinetic energy and potential energy, mechanical energy. The method of using the experimental inquiry let the students know the determinants of kinetic energy and potential energy size. We can illustrate the potential energy and kinetic energy and their transformation with examples. The access to information for students to recognize the energy is closely related to peoples normal life and production, in order to enhance the awareness of rational use of energy. 2, analysis of teaching materials: This compilation idea is: first by the students often hear about can saying in daily life, such as wind, water, electricity, solar energy, etc., the introduction of the concept of can, at the same time and work by figure 8 - 32 different forms of contact icons, and draw the basic the meaning can be removed, the object has the work performance or ability. At the same time, the relationship between work and energy conversion, and a unit of energy. Finally, the focus falls on the mechanical energy (kinetic and potential energy) research, teaching material has arranged two experimental inquiry activities: one is exploring which factors related to the size of the kinetic energy; two is the size of the potential and what factors. A gas station before the first experiment, the purpose is to help students in experiment, to supplement the application of gas station of knowledge to get experimental research conclusions. After exploring the two experimental materials, also arranged a rolling pendulum and pendulum two presentation bouncing toy bar, the purpose is to let students through observation and thinking, found that the conversion of kinetic energy and potential energy, in order to penetrate the mechanical energy transformation and conservation i