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学习目标及重、难点【学习目标】1.通过比较压力与重力,知道压力是一种弹力,压力的方向垂直于受力面。2.探究压力的作用效果跟什么因素有关,形成压强的概念3.学会应用压强知识,解释简单现象和解决简单的问题。(1)通过应用压强知识进行有关计算,加深对压强概念的理解。(2)观察生活中各种跟压强有关的现象,了解压强存在于生活中的普遍性,通过实践活动认识改变压强大小的方法和途径。【重点】1.经历探究压力的作用效果跟什么因素有关的过程。
Learning objectives and heavy and difficult [learning objectives] 1. By comparing the pressure and gravity, that pressure is a kind of elastic force, the direction of pressure perpendicular to the stress plane. 2. To explore the effect of stress on what factors with the formation of the concept of pressure 3. Learn to use pressure knowledge, explain simple phenomena and solve simple problems. (1) Compute the concept of pressure by applying the knowledge of pressure and deepen the understanding of the concept of pressure. (2) Observe all kinds of phenomena related to pressure in life, understand the universality of stress existing in life, and know the ways and ways to change the intensity of pressure through practical activities. 【Key Points】 1. Experiencing the process of exploring the effect of pressure on what factors.