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四上教科版科学空气有质量吗教案课件来了

  • 2026-09-21 13:11:50

四上教科版科学空气有质量吗教案课件来了

小学四年级上册科学“空气有质量吗”这课，核心就在于让孩子学会像科学家一样找证据。

这套备课资料整合了教学课件、教案设计与教师逐字稿。课件紧扣科学核心素养，把控制变量、搭建简易天平、打气前后对比和绿豆配平讲解得清清楚楚。研讨问题层层递进，练习题精准击中“看不见等于没有质量”的常见认知误区，帮助学生轻松掌握空气特征。

备课不用再东拼西凑，看着孩子们在实验里真正学懂，当老师的特别有成就感。
#教科版科学#空气有质量吗#四年级科学上册#教学课件#教案设计#逐字稿#科学探究#科学思维#证据推理#空气

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  1. CONNECT:[ UseTime:0.000514s ] mysql:host=172.18.0.4;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000717s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000466s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000355s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000591s ]
  6. SELECT * FROM `set` [ RunTime:0.000290s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000686s ]
  8. SELECT * FROM `article` WHERE `id` = 529547 LIMIT 1 [ RunTime:0.000336s ]
  9. UPDATE `article` SET `lasttime` = 1789981428 WHERE `id` = 529547 [ RunTime:0.001300s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000326s ]
  11. SELECT * FROM `article` WHERE `id` < 529547 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000445s ]
  12. SELECT * FROM `article` WHERE `id` > 529547 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000428s ]
  13. SELECT * FROM `article` WHERE `id` < 529547 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.000523s ]
  14. SELECT * FROM `article` WHERE `id` < 529547 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000483s ]
  15. SELECT * FROM `article` WHERE `id` < 529547 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000525s ]
0.089491s