2022年《密度》教案 .pdf

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1、课题第六章第二节 密度教学目标一、知识与技能：1、理解密度的物理意义；2、用密度知识解决简单的实际问题。二、过程和方法：1、通过实验探究得出质量与体积的比值关系，得到可以用质量与体积的比值来表示物质的一种特性，从而引出密度的概念；2、学习用图像的方法来表示和研究物质的密度。三、情感、态度和价值观：密度反映的是物质本身所具有的特性。通过探究活动，使学生对物质特性的认识有新的拓展，唤起学生对自然奥秘的探究兴趣。重点难点教学重点：通过探究不同物质质量体积的比值不同，认识密度是物质的特性。教学难点：运用控制变量的方法进行实验并分析得出结论。教学方法实验、归纳、对比教具学具教师：天平、体积相同的长方铁块

2、、铝块、铜块（两组，期中有一组包有白纸）；烧杯、质量相等的水和酒精学生（分组）：天平、砝码、体积相同的长方铁块、体积不同的铁块、刻度尺教学过程引入教师活动学生活动设计意图创设情境一个古老的故事：古时候，在地中海上，有一个叙拉古王国，它的国王交给金匠一定质量的黄金，让金匠为自己打造一顶纯金的王冠，当王冠打造完毕交给国王时，国王发现这个金冠精美无比，但国王却怀疑金由一个古老的故事，引发学生思考：王冠的质量与黄金的质量相同，是否就是纯金的。从有趣的实际问题中引入课题，引起学生的研究兴趣。引入课题匠偷窃了他的黄金而用其它便宜的金属偷梁换柱。国王令人用秤去称，结果王冠的质量与国王交给金匠的黄金的质量是相

3、同的。那么王冠是否是纯金制成的吗？提出问题：1、如何去鉴别王冠是否是纯金制成的？2、抗洪抢险的战士穿的救生衣的材料是什么？3、配制鸡尾酒，为什么可以区分出美丽的颜色和层次？4、热气球中为什么要充有氢气、氦气或热空气？连 续 提 出 几 个 相 关 问题，引起学生对密度问题在生活中的应用的关注，进行初步猜测。引发学生的深入思考，了解到可能和不同物质的种类有关。进而猜测不同物质会有不同的性质。新课讲授教师活动学生活动设计意图引出探究问题一、引出探究问题1、生活中鉴别物质种类的方法：如何区分不同的物质？老师展示实验器材：体积相同的长方铁块、铝块、铜块，颜色相同的不同液体水和酒精，或水和盐水。2、物体

4、质量和体积的关系观察及思考一：学生观察铁块、铝块、铜块的颜色，并进行鉴别。学生观察液体，说明区分的方法：闻气味，可区分出酒精和水；尝味道可区分出水和盐水。引导学生从物体的颜色、气味、味道这些特性鉴别物质种类。文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C1

5、0C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C

6、10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2

7、C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM

8、2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 H

9、M2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

10、HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

11、 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5（1）老师展示实验器材：包有白纸的体积相同的长方铁块、铝块、铜块。提出问题：如何区分哪块是铁块、铝块和铜块？（2）实验一：演示验证：将金属块分别放在调节好天平的左右两盘，比较质量。质量/g 体积/cm3铜块10 铁块10 铝块10（3）能得什么结论？体积相同的不同物质的质量不同。学生将长方体金属块分别放在两只手上。学生预设回答：对手压力最大的是铜块、其次是铁块、对手压力最小的是铝块。预设学生回答：体积相同的不同物质的质量不同。促使学生思考其它区分铁块、铝块、铜

12、块的方法：体积相同的不同物质的质量不同。文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2

13、C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM

14、2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 H

15、M2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

16、HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

17、 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G1

18、0 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5观察及思考二：（1）老师展示实验

19、器材：装在瓶中的水、酒精、浓盐水；（2）提出问题：用天平如何区分不同的液体？（3）实验二：演示验证：在两个相同的烧杯里分别倒入水和酒精（或水和盐水），放在调节好天平的左右两盘，调节也体量，当水和酒精质量相同时比较体积。（3）能得什么结论？质量相同的不同物质，体积不同。预设学生回答：（1）倒出体积相同的液体，称出质量；（2）称出质量相同的液体，体积大小不同预设学生回答：质量相同的不同物质，体积不等。进一步引导学生用物体的质量与体积的比值可以鉴别不同物质。文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1

20、D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O

21、1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1

22、O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C

23、1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10

24、C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C1

25、0C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C

26、10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5有效启发学生探究二、探究物质的质量与体积的关系1、提出探究问题：物质的质量与体积存在怎样的关系？2、实验方案：几个不同体积的铁块和几个不同体积的铝块，用天平分别测量它们的质量，用刻度尺分别测量与体积相关的长度，计算它

27、们的体积；一部分小组测量铁块，一部分小组测量铝块。数据记录在教材第 113页的表格中。3、学生分组实验【实验器材】天平、砝码、体积不同的铁块和铝块【实验步骤】(1)调节天平平衡；(2)用天平分别称量不同体积的铁块（铝块）的质量，并记入表格；（3）用刻度尺测量铁块（铝块）的边长，计算铁块的体积，并记入表格。分组实验：选择实验器材。实验测量、记录数据。培养学生设计实验、规范操作、表格设计及正确读取数据。培养学生科学严谨的态度，形成尊重事实的科学态度，提倡学习方式的多样化。文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM

28、2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 H

29、M2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

30、HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

31、 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G1

32、0 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G

33、10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2

34、G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5实验过程中教师重点指导：a.天平、刻度尺使用规范；b.学生的分工协作是否合理。4、【数据分析与归纳结论】（1）分析各组实验数据表，请学生观察并说明数据反映的规律。分析实验数据，讨论交流，得出结论。预设

35、学生回答：质量增大，体积也增大，体 积 跟 质 量 可 能 成 正培养学生分析实验数据，用表格和图像的方法研究分析数据并得文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C1

36、0C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C

37、10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2

38、C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM

39、2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 H

40、M2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

41、HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

42、 HM2C10C1O1D3 ZC7R2V6A1G5（2）用图象描述质量和体积的关系。引导：i.你知道坐标系中一个点所表示的意义吗？ii.把你所测量的各铁块或铝块的体积、质量数据在坐标系中表示出来。iii.体积为 0 时，质量也为 0，可以在坐标系中再加上一个m=0，V=0 的点。iv.把各点连成平滑的一条线。质量/g 体积/cm3铁块 1 铁块 2 铁块 3 铁块 4 铁块 5 铝块 1 铝块 2 铝块 3 铝块 4 铝块 5 比。体积增大，质量也增大，质量跟体积成正比。预设学生回答：表示某个铁块的体积和质量。横坐标表示体积数值，纵坐标表示他的质量数值。学生分析实验数据：描点、作图，用图象的方

43、法表示测量的结果。出实验结论的能力。文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C1

44、0C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C

45、10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2

46、C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM

47、2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 H

48、M2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10

49、HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5（3）能得出什么结论？图象是一种直观

50、、有效的数据分析方法。你所作出的图象反映了质 量 随 体 积 有 怎 样 的 变 化 关系？在数学中学习过，这表示什么函数关系？计算质量与体积的比值。归纳结论：结论 1、同种物质的质量和体积成正比，即比值是一定的。（4）还能得出什么结论？比较不同物质的质量和体积的关系：比较铁和铝的图象；比较铁和铝质量跟体积比值；学生讨论交流，得出结论：质 量 随 体 积 增 大 而 增大。过原点的直线是正比例函数。表述结论：铁块的质量跟体积成正比。铝快的质量跟体积也成正比。文档编码:CA1D2R10G2G10 HM2C10C1O1D3 ZC7R2V6A1G5文档编码:CA1D2R10G2G10 HM2C10C