第十一课

 eleven11

Flowers of plants植物的花

1. We have flowers of different shapes and colors around us. What are the same parts of them?

我们周围有形态不同、颜色各异的花朵。它们有哪些相同的部分?

Material package材料包

2. Peach blossoms, lilies, etc.桃花、百合花等。

Activity process活动过程

3. Understand the structure of flowers.认识花的构造。

4. How many parts of peach blossom?桃花有几部分?

5. The middle one is thicker.中间的一根比较粗。

Method guidance方法指导  

6. When dissecting peach blossoms, follow the order from outside to inside, do not damage the dissected part.

7. 解剖桃花时要按照由外到内的顺序，不要损伤到被解剖的部分。

8. clamp the base of the torn part with tweezers.用镊子夹住被撕部分的基部。

Information Card资料卡

9. Calyx consists of many sepals, Corolla consists of many petals, stamens consist of anthers and filaments, pistil consists of stigma, style and ovary.

10. 花萼由许多萼片组成，花冠由许多花瓣组成，雄蕊由花药和花丝组成，雌蕊由柱头、花柱和子房组成。

Inquiry skills探究技能

11. First look at the sepals and petals of peach blossoms, then dissect the stamens and pistils of peach blossoms, that is, from outside to inside.

12. 先看桃花的萼片和花瓣，解剖后再看桃花的雄蕊和雌蕊，就是在由外到内观察。

13. How many parts do they consist of?它们由几部分组成?

14. According to the structure of flowers, flowers can be divided into complete flowers and incomplete flowers.

根据花的构造,花可以分为完全花和不完全花。

15. In a flower, the calyx, corolla, stamens, stamens four parts are called a complete flower;

在一朵花中,花萼、花冠、雄蕊、雌蕊四部分齐全的叫作完全花;

16. Missing one, two, or three parts is called incomplete flower.

缺少其中一部分、两部分或三部分的叫作不完全花。

17. What is the role of each part of the flower?花的各部分有什么作用?

18. Why is the stigma of lily pistil a little sticky?百合花雌蕊的柱头为什么有点黏?

19. What is the effect of petals?花瓣有什么作用?

20. How do flowers pollinate?花是怎样传粉的?

21. Bees can help peach blossoms pollinate.蜜蜂可以帮助桃花传粉。

Outreach activities拓展活动

22. Consult data to understand the relevant knowledge of artificial pollination.

查阅资料，了解人工授粉的相关知识。