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【初中科学·教材详解】26新版浙教版九上科学课本导读:九下第一章

  • 2026-07-26 20:07:32
【初中科学·教材详解】26新版浙教版九上科学课本导读:九下第一章
本周我们继续讨论新教材九下第一章的内容变化,内容对应老教材九上第二章。(新教材九上和九下的第五章将合并放在最后讨论)同样先奉送一个放在开头的总结精要版:
一、整体改动很小;
二、物质分类和有机材料两节顺序有调整;
三、金属冶炼(热还原反应)调入金属那一节。
九下第一章的具体导读:
第一节 金属材料
①金属的物理性质:差别不大,新增了一个金属物理性质数据表,不重要。
②合金:旧版“常见金属材料”的修订模块,有一定调整,一是给出了生铁和钢的具体参数;二是新增了钛合金的阅读材料;三是给出了常见合金的组成、特性、用途表格;四是新增了集中新型金属材料的科学阅读。均属于优化改动。
③金属的回收与利用:改动不大,这部分从初中到高中,都很难成为一个重点。
第二节 金属的化学性质
①金属的化学性质:改动不大,新增了一个锌铝分别与硫酸铜反应的实验,增强了与金属活动性顺序的衔接,优化改动。
②金属活动性顺序:改动很小,甚至化学反应中的电子转移也保留下来了,这个要点个好评。
③金属的冶炼:原属于旧版第五节热还原反应的内容划入本节,内容改动不大,更接近于人教版编写思路,完善了高炉炼铁,和湿法炼铜形成了一定衔接,整体好评。
④金属的防护:实验设计微调,整体上和旧版差别不大。
第二节把冶炼重新划了回来,形成了物理→化学→性质归纳总结→冶炼→防护一体完整的教学流程,整体思路上好了很多。
课后习题把碱金属与冷水的反应删了,这个不应该删的,差评。因为学生是真的会问。
第三节 物质的分类与转化(这节真的没必要放在有机物之前吧,有机物讲完再讲物质分类不是更合理吗?)
①物质的分类:差别不大。
②物质的转化:调整很小,但是感觉这部分是真没有什么调整空间了。新增了复分解反应发生的条件的科学阅读(之前说过了)。新增的很好,但是为什么这么突兀地放在九下的这里呢。。。
③材料的合成:改动不大。
课后习题来了个物质推断题,难道物质推断要文艺复兴了?
第四节 有机材料及其应用
①简单的有机物:调整很小,新增了甲醛的阅读材料。
②生物体中的有机物②有机合成材料③新型材料:三个模块调整都很小,不展开说了。
总的来说,金属有机物这个章节内容调整是不大的,最大的问题还是没有和九上酸碱盐连在一起,不知道编委是不是开了一个像高中物化生教材一样的脑洞,就是分猪肉,每本书里物化生都得均匀地沾点儿,如果说真是这样可太蠢了。个人感觉这一章的内容容量其实和九上第四章遗传变异也差不了多少,完全没必要放在九下的。
至于内容和编排其实整体都还算合理和优化,这还是值得肯定的。
最后同样给出一些意见:在往年的经验基础上,老师备课或学生预习要注意以下几个点:
老师或同学在暑假预习的时候,还是先按照旧版的思路,完成整个物理化学的预习。因为还是那句话:开学之后学校必然还是分科的,九上是一定会完成所有物理化学的教学的,没有学校敢赌到明年三月份一边准备总复习一边还在讲金属活动性。所以第一不要心存侥幸、第二不要心存幻想真的按照新教材的顺序来教学或学习。
②金属有机物因为教材改动很小,所以整体教学/学习思路不变,大概只有高炉炼铁这一个点上稍微给学生多介绍一下就好了,也属于点到为止。
#浙江科学#浙教版科学九年级下册#真题#九年级科学#课本#杭州上城区 #中考科学 #中考模拟

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  1. CONNECT:[ UseTime:0.000707s ] mysql:host=127.0.0.1;port=3306;dbname=c_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001225s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000332s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000264s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000578s ]
  6. SELECT * FROM `set` [ RunTime:0.000201s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000623s ]
  8. SELECT * FROM `article` WHERE `id` = 469673 LIMIT 1 [ RunTime:0.000402s ]
  9. UPDATE `article` SET `lasttime` = 1785074453 WHERE `id` = 469673 [ RunTime:0.000815s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000235s ]
  11. SELECT * FROM `article` WHERE `id` < 469673 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000414s ]
  12. SELECT * FROM `article` WHERE `id` > 469673 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000394s ]
  13. SELECT * FROM `article` WHERE `id` < 469673 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000687s ]
  14. SELECT * FROM `article` WHERE `id` < 469673 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000774s ]
  15. SELECT * FROM `article` WHERE `id` < 469673 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000772s ]
0.079165s