Unit 5 Look into Science.Lesson 28 The Study of Living Things.课件

课件20张PPT。Lesson 28 The Study of Living Things词 汇 点 睛句 型 透 视短 语 互 译句 型 在 线Learning aims
1.运用合适自己的方法背诵本课的单词和词组：biology, butterfly, fantastic. in fall, draw one's attention, cut down, as many as, lay eggs, leave for, when to fly south.
2.通过完成各项学习任务了解蝴蝶的秘密。
3.在学习中积极思考，勇于用英语表达自己的看法。培养热爱科学的态度和探究自然秘密的勇气。Learning the words:Chip Taylor 奇普。泰勒 biology 生物学；生物
butterfly 蝴蝶 migrate 移居；迁徙
fantastic 奇异的；极好的 completely 完全地
milkweed （植）马利筋 chemical 化学物质
puzzling 令人费解的
grandchild 孙子；孙女；外孙；外孙女
female 雌性的动物或植物；女子Lesson 28 The Study of Living Things1. 在秋天 ________________ 　　　　　　　　
2. 引起某人的注意 ________________
3. 砍伐 ________________
4. as many as ________________
5. lay eggs ________________
6. leave for________________
7.小片的森林
8. when to fly southin fall draw one's attention cut down 多达 产卵，下蛋 动身前去什么时候飞往南方small piece of forestMake up a dialogue and work in pairs.
1. Would you like to be a biologist when you grow up? Why or why not?
2. What mysteries of nature do you know about?Watch it and listen to it carefully, then answer the following questions:视频
1. When do the butterflies travel?
2. How far do they travel?
3. When do they travel north?
Listening Exercises: Dr.Chip Taylor teaches biology __________
in the United States. He studies one kind of _____________butterfly.Just like a migrating bird, this butterfly travels _______________
South_________.
North Americanat a university4000 kilometersin fallRead the text and answer the following questions:1. Where do the buttetflies spend the winter?.
How many butterflies?
2. Where do they lay eggs?
3. What does “this” refer in Paragraph 3 ?
4. What don’t scientists understand?
In MexicoAs many as 230 million.Milkweed.Farmers use chemicals that kill milkweed.How do the butterflies know when to fly south?
How do all the great-great grandchildren find the same forest in Mexico?
Read the text again and complete the table.return/fly tospendleft forlay eggsrest onkillfindListen and read the text carefully, then practce it in groups.Lesson 28 The Study of Living Things1. 关于蝴蝶的奇异的事实引起了泰勒博士的注意。
Fantastic facts about the butterfly ________ ________ ________ Dr. Taylor's________．
2.在墨西哥，这些蝴蝶总是回到仅有二十公里宽的同一小片森林。
In Mexico, the butterflies always return to the same small piece of forest, ________ _____ ________ ________ ________ ________．
3. 返回到南方的这些蝴蝶是前往北方的蝴蝶的玄孙们。
The butterflies that return to the south are the great-great grandchildren of the butterflies that ________ ________ ________ ________．have been drawing attention which is only 20 kilometres wide left for the northLesson 28 The Study of Living Things4. 但是在墨西哥，因为人们需要更多的土地来耕作，所以他们砍伐了那些蝴蝶栖息的树。
But in Mexico, people ________ ________the trees that the butterflies need to rest on because they want more land for farming.
5. 科学家们仍然不明白蝴蝶们是怎么知道何时飞往南方的。
Scientists still don't understand how the butterflies know ________ ________ ________ ________. cut down when to fly south Lesson 28 The Study of Living Thingsfantastic adj. 奇异的；了不起的；极好的
[观察] Fantastic facts about the butterfly have been drawing Dr. Taylor's attention.
关于蝴蝶的奇异的事实引起了泰勒博士的注意。
She has a fantastic idea that her dead brother is alive.
她有一个奇异的想法， 她去世的哥哥仍活着。
[探究] fantastic指凭空想象出来的，使人感到奇怪而不能相信，强调妄想、失去理智，在口语中也可作“极大的，异乎寻常的，极好的，极出色的，了不起的”解。fantastic无比较级和最高级形式。 Lesson 28 The Study of Living Things活学活用
昨天晚上我们看了一部极好的电影
We watched a ___________ movie yesterday evening. fantasticLesson 28 The Study of Living Things1　Fantastic facts about the butterfly have been drawing Dr. Taylor's attention.
关于蝴蝶的奇异的事实引起了泰勒博士的注意。
[探究] (1) have been doing sth. 为现在完成进行时，结构为“have/has been＋v.-ing”，表示一段时间以来一直从事的动作，强调连续不断，并有可能还会继续下去。
(2) draw one's attention引起某人的注意活学活用
“迈克看了多长时间的电视了？” ,“从两点钟开始一直在看。”
—How long _________ Mike ________ ________ TV？
—He ___________ ___________ ___________ since 2 o'clock. Lesson 28 The Study of Living Thingshas been watching has been watching 2　In Mexico, the butterflies always return to the same small piece of forest, which is only 20 kilometres wide.
在墨西哥，这些蝴蝶总是回到仅有二十公里宽的同一小片森林。
[探究] 该句是一个复合句，其中which 引导的是非限制性定语从句，其作用是对所修饰的成分作进一步说明，通常和主句间用逗号隔开，将从句去掉后其他部分仍可成立。Lesson 28 The Study of Living Things活学活用
(　　)She heard the terrible noise, ________brought her heart
into her mouth.　
A．it　　　　　　B．which
C．this D．thatLesson 28 The Study of Living ThingsB[解析] 后半句为非限制性定语从句，要用which来引导，which指代noise，在从句中作主语。 3　The butterflies that return south are the great-great grandchildren of the butterflies that left for the north.返回到南方的这些蝴蝶是前往北方的蝴蝶的玄孙们。
[探究] 该句为含有两个定语从句的多重复合句，其中两个that 分别引导一个定语从句。Lesson 28 The Study of Living Things活学活用
（　　）[2014·达州] —What kind of movies do you like？
—I like movies_____ scary monsters.
A. which has　 B. that have
C. what has D. why have Lesson 28 The Study of Living ThingsB