Using LanguageⅡ教案设计范例

Unit4 Using language 教学设计

Period 3语言运用课

教学设计

设计意图

This is the third teaching period of this unit. The first task is to comprehend the passage about a visit to the moon and improve the ability of reading. And the second task is writing. In this period, students learn the knowledge of astronomy, especially about moon. At the end of this class, students can be interested in the science of astronomy by expressing themselves in English. 1. To introduce a visit to the moon and train students, reading ability. 2. To accumulate common knowledge about astronomy through the author’s experience, self-directed study and cooperation. 3. Be interested in astronomy by expressing themselves in English. 教学重点

How to write a passage about settling questions in English. 教学难点

How to describe the astronomy knowledge in English. 教学过程

Task 1 Lead-in (设计意图：通过学生所熟悉的中国登月的故事，链接旧知识，激发兴趣，从而引导学生了解目前我们对月球的探索，然后导入本节话题。）

T：

Hello, everyone, last period, we learnt something about the development of life on the earth. So first I would like someone or some groups to perform the development of life on the earth for us. Who or which group would like to? S1：…

T: Now let’s watch a short video. After watching the video, please tell us what the video is about. S2:…

T: Now we will “travel to the moon” in this class.

Task 2 Reading

(设计意图：快速浏览全文，抓住文章的结构，训练学生在文章中抓关键细节的能力。）

Go through your text quickly and silently and finish the following two forms within 8 minutes. 1. Read the passage carefully and then describe the three ways in which gravity changed for Li Yanping.

Left the earth In space On the moon The way gravity changed (1) (2) (3) 2. Read the passage carefully and then describe how his weight changed.

Left the earth In space On the moon Suggested answers：

1. (l)The gravity became very strong. (2)The gravity disappeared. (3)It became very light. 2. (l)He became very heavy. (2)He had no weight and could float around like a feather. (3)He was about one-sixth of his weight on the earth. (8 minutes later, students can answer the questions actively.)

Task 3 Careful reading (设计意图：通过分析句子成分来理清句子结构并进一步理解课文，提高分析长难句的能力。）

Since we have got the structure of astronomy and known the common knowledge of gravity, let’s read the passage again. While reading, underline the important phrases and long and difficult sentences. The weight changed (1) (2) (3)

1. It will not be as strong a pull as the earth’s.

(1) 翻译本句

(2)在as…as…结构中第一个as是

____ (词性），因此后面可以跟

______ 、

第二个as是 ______ (词性）。

2. But when I tried to step forward, I found I was carried twice as far as on the earth and fell over. (1) 翻译本句

(2)通过本句总结倍数的表达方式： Suggested answers：

1.(1)月球的引力不像地球的引力那么大。（2）副词；形容词、副词；连词

2.(1)当我试着向前迈步时，我发觉我被送出去很远，步子的跨度竟是地球上的两倍，因而，我摔倒了。（2）A +is+倍数+ as +adj./adv. +as +B Task 4 Post reading —writing 请根据写作指导完成写作任务。

If you were given the chance to travel to the moon, what problems do you think you would face? List one of the problems and think of a solution to solve it. Requirements：

1. First list the problem you might have on the moon. 2. List the possible solution. 3. How the solution help solve the problem. 4. The writing must be written about 120 words. 走进高考英语作文阅卷室

1.先根据文章内容和语言初步确定其为上档（18分以上）或下档（18分以下）。

2. 要点全面，紧扣主题，观点表达充分，有效使用连接词，具备较强的书面表达能力(加减0-5分)。

3. 表达内容的正确性(加减0-5分）。

大错:语法错误，用词错误(每错一处扣1分）

小错:单词拼写，冠词，大小写，标点符号错误(错三个扣1分）

参考范文：

I would be happy to accept the chance to travel to the moon. But if I visited the moon, perhaps I would face many problems. One of the problems I might have is how I should stop my food floating away. I would have to take all my food with me if I went to the moon. As far as we know, in the spaceship there is no gravity so the food would float around if it is solid. So I would make sure that it is specially made as liquid space food. I can put my liquid space food in a cub and then I would be able to eat it more easily. Perhaps I would use a straw to eat it. It would solve the problem. 课后作业

Polish your composition and hand it in. 备课资料

Gravitation of the Moon The gravitational field of the moon has been determined by the tracking of radio signals emitted by orbiting spacecraft. The principle used depends on the Doppler effect, whereby the line-of-sight spacecraft acceleration can be measured by small shifts in frequency of the radio signal, and the measurement of the distance from the spacecraft to a station on earth. Since the gravitational field of the moon affects the orbit of a spacecraft, it is possible to use these tracking data to invert for gravity anomalies. However, because of the moon's synchronous rotation it is not possible to track spacecraft much over the limbs of the moon, and the far-side gravity field is thus only poorly characterized. The acceleration due to gravity on the surface of the moon is 1. 6249 m/s2. Over the entire surface, the variation in gravitational acceleration is about 0. 0253 m/s2 (l. 6% of the acceleration due to gravity). Because weight is directly dependent upon gravitational acceleration, things on the moon will weigh only 16. 6% of what they weigh on the earth. The major characteristic of the moon’s gravitational field is the presence of mascon, which are large positive gravity anomalies associated with some of the giant impact basions. These anomalies greatly influence the orbit of spacecraft about the moon, and an accurate gravitational model is necessary in the planning of both manned and unmanned missions. They were initially discovered by the analysis of Lunar Orbiter tracking data since navigation tests prior to the Apollo program experienced

positioning errors much larger than mission specifications. The origin of mascon is in part due to the presence of dense mare basaltic lava flows that fill some of the impact basins. However, lava flows by themselves cannot explain the entirety of the gravitational variations, and uplift of the crust-mantle interface is required as well. Based on Lunar Prospector gravitational models, it has been suggested that some mascon exist that do not show evidence for mare basaltic volcanism. The huge expanse of mare basaltic volcanism associated with Oceanus Procell arum does not possess a positive gravity anomaly.