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由以上20个省市的中考物理题可知,有关能量的中考题主要存在以下特点: 1-本部分内容主要考查:分子动理论、效率(包括机械效率以及其他能量的利用效率、热机的效率等)、比热容、能量转化、改变内能的两种方式、功与功率、杠杆平衡条件的研究及应用、热量的简单计算等.其中热量计算通常与电学结合命题,功和功率通常与机械效率、力与运动等知识结合命题. 2.基础性强,总体难度不大.各地中考中有很多试题源自教材,但是又不是单纯考查学生的记忆性知识,而要学生通过一定的思考分析才能解答,较好地考查了学生运用知识分析问题和解决问题
From the physical examination questions of the above 20 provinces and cities, we can see that the energy-related examination questions mainly have the following characteristics: 1- The main content of this section examines: molecular dynamic theory, efficiency (including mechanical efficiency and other energy utilization efficiency, heat engine efficiency, etc. ), Specific heat capacity, energy conversion, two ways to change internal energy, work and power, research and application of leverage balance conditions, simple calculation of heat, etc. Among them, heat calculation is usually combined with electricity proposition, work and power are usually with mechanical efficiency, The combination of force and sports and other knowledge propositions. 2. Strong foundation, overall difficulty is not difficult. There are many questions in the local examinations from the teaching materials, but it is not just to examine students’ memory knowledge, but students must be able to answer through certain thinking analysis. , better examines students’ use of knowledge analysis problems and problem solving