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一、决定物理学习成败的王牌——密度密度是八年级物理新人教版第六章第二节的内容.是一节非常重要的内容,夸张点讲,它的“成败”会直接影响八年级下学期的浮力和压强等知识的“成败”.因此它是学好浮力、压强等知识的王牌.〈教师教学用书〉中写到“本章继机械运动、声现象、物态变化、光现象之后,介绍质量与密度,为八年级下册的力学部分打基础”“密度是学习质量之后引入的一个新物理量,它在全章中起着承上启下的作用,并为以后学习压强和浮
First, determine the success or failure of the trump card physics - Density Density is the eighth grade Physics PEP sixth chapter second section is a very important section, exaggerated point, its ”success or failure“ will be direct Affect the buoyancy and pressure of the eighth grade next semester knowledge ”success “ Therefore, it is to learn buoyancy, pressure and other knowledge of the trump card. ”Teacher teaching book“ wrote ”This chapter following the mechanical movement, sound phenomena, objects After the change, the phenomenon of light, the introduction of quality and density, for the eighth grade under the mechanical part of the foundation to lay the foundation “” Density is a new physical quantity introduced after the study of quality, it plays a role in the whole chapter, Learning pressure and floating