第二课

2  Fish鱼

1. Have you ever raised any fish at home? 你家里养过鱼吗？

2. What fish do you know?你认识哪些鱼？

3. Material package: fish, food pigment, etc.材料包：鱼、食用色素等。

4. Activity process活动过程

5. Observe the common characteristics of fish观察鱼有哪些共同特征

6. The fish has fins on its torso and鱼的躯干上有鳍，还有·······

7. Head, trunk, and tail头、躯干、尾

8. dorsal fin, pectoral fin, ventral fin, gluteal fin, caudal fin背鳍、胸鳍、腹鳍、臀鳍、尾鳍

9. I found the fish swimming when， fins 我发现鱼游动时，鱼鳍······

10. Why is the cheek cover one by one?腮盖为什么一张一合的？

11. Let's explore it together.我们一起来探究。

12. Methodological guidance方法指导

13. Suction some water with green food coloring,用滴管吸一些用绿色食用色素调制的水，

14. In front of the mouth在于的嘴前挤出

15. Observe which part of the fish green water enters and flows out.观察绿色水从鱼的哪个部位进入和流出。

16. Animals like crucian carp and grass carp belong to fish.像鲫鱼、草鱼这样的动物属于鱼类。

17. The common characteristic of fish is to live in water鱼类的共同特征是生活在水中

18. The surface of the body is covered with scales and fins, breathing with the cheeks.身体表面覆盖着鳞片，有鳍，用腮呼吸。

19. Do they belong to fish?它们属于鱼类吗？

20. Octopus, turtle, seahorse, whale, shark章鱼、甲鱼、海马、鲸、鲨鱼

21. Inquiry skills探究技能

22. Fish breathe on their gills while whales breathe on their lungs鱼类用腮呼吸，而鲸用肺呼吸

23. Thus the whale does not belong to fish, is reasoning.由此推出鲸不属于鱼类，就是推理。

24. Outreach activities拓展活动

25. Keep some fish养几条小鱼

26. Continue to observe the effect of fins on fish movement.继续观察鳍对鱼运动的作用。