第1课

2021-6-11 15:37| 发布者: admin| 查看: 153| 评论: 0

摘要: .

Unit 1 human life第一单元人的一生

What changes will people go through in their life?人的一生会经历哪些变化？

What are cells?细胞是什么？

Who do I look like?我长的像谁？

How interesting and complex life is.生命多么有趣，多么复杂。

Let's uncover the secret of life!我们把生命的秘密揭开吧！

1 cell细胞

What is the composition of organism oil?生物体是由什么构成的？

Collect pictures and words about cells.搜集有关细胞的图片和文字资料。

Prepare the dough.准备橡皮泥。

Understand the cells of different organisms.了解不同生物体的细胞。

1. Exchange the information we collected.交流一下我们搜集的资料。

I know Paramecium is made up of one cell.我知道草履虫是由一个细胞构成的。

I know that cells were first discovered by British scientist Robert hook.我知道细胞是英国科学家罗伯特﹒虎克最早发现的。

2. All living things are made up of cells, which are the basic units of living things.生物体都是由细胞构成的，细胞是生物体的基本单位。

3. Observe the cells of organism.观察生物体的细胞。

1. I observed that the surface of onion is made up of small lattices.我观察到洋葱表皮是由一个个小格子组成的。

2. I draw the cells.我把细胞的样子画下来。

1. Blood cells血细胞

2. Muscle cells‘肌肉细胞‘

3. Parenchyma cells of leaves叶子的薄壁细胞

4. Oral epithelial cells口腔上皮细胞

5. The lower epidermis cells of the plant鸭跎草的下表皮细胞

6. Hydrophyte cells水蕴草细胞

4. In the process of growth and development, cells grow, reproduce, age and die.生物体生长发育的过程中细胞不断生长、繁殖、衰老、死亡。

3. Making cell model.制作细胞模型。

4. Look up the data to understand how cells grow.查阅资料，了解细胞是怎样生长的。

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