“机械能与内能”一章主要考点有:动能、势能、机械能及其相互转化,内能及改变内能的两种方法,比热容及热量,热值与热机,是中考的热点.中考对这章的要求为:能探究物体的动能和势能影响因素以及相互转化规律,能用实例说明机械能和内能的转化关系,会简单描述内能和温度的关系,从能量转化的角度认识燃料的热值,说出热机的工作原理,并进行有关热量的计算.本文将通过一个个具体实例帮助同学们整体把握全章考点,掌握相关 “Mechanical energy and internal energy, ” a chapter of the main test points are: kinetic energy, potential energy, mechanical energy and its mutual conversion, internal energy and change the internal energy of the two methods, specific heat capacity and calories, calorific value and heat machine, The requirements for this chapter are: to explore the kinetic and potential energy of objects and the factors that affect each other, and to illustrate the relationship between mechanical energy and internal energy by using examples. The relationship between internal energy and temperature will be briefly described, and the fuel is understood from the perspective of energy conversion Of the calorific value, say the working principle of the heat machine, and the calculation of calories.This article will help students through a specific example of the overall grasp of the exam points to master the relevant