发布时间 : 星期三 文章高中英语人教版必修三Unit4《Astronomythescienceofthestars》教案 - 图文更新完毕开始阅读
Unit 4
Astronomy: the science of the stars
教材分析和教材重组 教材分析 本单元的主要内容是边缘科学、地球生命的起源，万有引力、黑洞和太空Z.xx.k 旅行等天文学知识。通过本单元的学习，培养学生对科学的兴趣，激发学 生探究科学的热情。 1. Warming Up部分共有三组问题，第一组问题引导学生讨论边缘科学(Frontier Science)，即以两种或多种学科为基础而发展起来的科学。例如，生物化学是以生物学和化学为基础的边缘科学。第二组问题探讨科学研究的方法。第三组问题让学生思考要成为真正的科学家所必须掌握的技能。 2. Pre-reading部分主要让学生弄清楚什么是科学思想，什么是宗教信仰或文化传统。学生总喜欢听故事或讲故事，在探讨生命的起源的科学道理之前，让学生交流一下有关宇宙的起源的种种传说，既有趣味性，又能调动学生的相关知识，激活学生的思维。 3. Reading部分讲述了地球上生命的起源。水的形成使得地球有别与其他星球，它使得地球上生命的诞生成为可能。科学家认为，地球上的生命首先诞生于水中，上百万年后，陆地上才长出绿色植物，随后出现了陆栖动物和水陆两栖动物。最初的动物靠孵化繁衍后代，后来出现了哺乳动物，人类也随之诞生了。文章最后讲述的现象发人深省：The earth may become too hot for the lives on it.它关系到地球上生命的未来。 4. Comprehending部分通过四个选择填空题检测学生对本文核心问题的理解：地球上生命的起源和延续需要哪些条件?随后通过排序的方式帮助学生弄清本文的行文线索，也就是地球上生命的起源和发展历程。最后提出两个问题，考查学生的深层理解和推断能力。 5. Learning about Language部分首先通过英文解释帮助理解课文中的生词，然后，通过短文填空、词语分类等形式将这些词语用于一个相关的情境中。语法部分也是采用先发现后应用的学习方法。先通过到课文中找句子，让学生认识主语从句，然后，设置一个用手机发短信息的情境，让学生进行简单句与主语从句之间的转换练习。最后设置情境来复习第三单元出现的表语从句。 6. Using Language部分综合训练听说读写的能力。听力部分的内容介绍三位科学巨匠，不仅通过听力填表的形式训练学生捕捉细节的能力，还通过四选一的形式帮助学生找主题思想。在解释对与错的过程中，教师可以适当地介绍一下概括主题的方法。阅读部分是一个科幻小故事，通过“我”和“我的朋友”乘宇宙飞船登月球的经历，介绍了重量、失重和地球引力等科学道理。说和写部分以Visiting the moon为话题，要求学生讨论登月球需要携带的物品和在月球上可能遇到的困难，并要求学生找出克服这些困难的方法。教师可以根据课本上的提示，向学生介绍“先分述后总结”的写作方法。提出问题的解决方案时，要求学生选用适当的“指示”用语。 教材重组 1. 将Warming Up，Pre-reading，Reading与Comprehending整合在一起上一节“阅读课”。 2. 将Learning about Language和Workbook的using words and expressions及using structures整合在一起上一节“语言学习课”。 3. 将Using Language设计为一节包括听说读写在内的“综合技能课（一）”。 4. 将Workbook的READING AND LISTENING和TALKING结合在一起上一节“听说课”。 5. 将Workbook的LISTENING TASK，READING AND WRITING TASK和SPEAKING TASK设计为一节“综合技能课（二）”。 1st Period Reading 2nd Period Language study 3rd Period Integrating skills(Ⅰ) 4th Period Listening and Speaking 5th Period Integrating skills(Ⅱ) 课时分配 Part 1: Teaching Design (第一部分：教学设计)
Period 1: A sample lesson plan for reading
(HOW LIFE BEGAN ON THE EARTH)
Aims
To develop the students’ reading ability To learn something about astronomy
Procedures
I. Warming up by learning vocabulary Good morning, class! Today, w are going to take Unit 4 Astronomy: the science of the stars. Before we read the text, let’s turn to page 99 and get familiarized with the vocabulary first. Pay attention to the making of the word. Study the prefixes, roots and suffixes in the words.
Astronaut Yang Liwei
II. Pre-reading
1. Looking and saying
Have you ever wondered how the universe began? Well I'm sure you may have many answers to this question, but I have one that perhaps, you may not have heard of yet. I will be giving you my theory on this subject. Now look at the screen and listen to me telling you something exciting. 科学家透露：宇宙可能有两个 我们的宇宙和一个\隐藏的\宇宙共同\镶嵌\在\五维空间\中。在我们的宇宙早期，这两个宇宙发生了一次相撞事故，相撞产生的能量生成了我们宇宙中的物质和能量。 2. Talking and sharing Do you know how the universe began?
In the 1920s in California, astronomer Edwin Hubble observed distant galaxies using an extremely powerful telescope. He made two mind-boggling(unbelievable) discoveries.
First, Hubble figured out that the Milky Way isn’t the only galaxy. He realized that faint, cloud-like objects in the night sky are actually other galaxies far, far away. The Milky Way is just one of billions of galaxies. Zxxk
Second, Hubble discovered that the galaxies are constantly moving away from each other. In other
words, the universe is expanding. The biggest thing that we know about is getting bigger all the time.
A few years later, Belgian astronomer Georges Lema?tre used Hubble‘s amazing discoveries to suggest an answer to a big astronomy question: “How did the universe begin?” III. Reading
1. Listening and reading aloud
Now please listen to the recording and then read the text aloud. Pay attention to how the native speaker is reading along and where the pauses are within each sentence. I will play the tape twice and you shall read aloud twice, too.
2. Reading and underlining
Next you are to read and underline all the useful expressions or collocations in the passage. Copy them into your notebook after class as homework. Collocations from HOW LIFE BEGAN ON THE EARTH a cloud of energetic dust具有能量的尘埃, combine into…合成……, move around the sun环绕太阳运转, become violent变得激烈, the solid surface固体表面, explode loudly猛烈爆炸, in time及时，最终, produce the water vapor产生水蒸汽, make the earth’s atmosphere构成了地球的大气层, cool down冷却, on the surface在表面, be different from…与……不同, go round the sun环绕太阳运转, disappear from…从……消失, stay on…存留在……, show one’s quality显现某人的特性, dissolve harmful gases分解，溶解有害气体, become part of…变成……的一部分, develop life发展生命, grow in the water在水里生长, fill… with…用……来填充……，充满了……, encourage the development of…鼓励……的发展, millions of years later几万年以后, live on land在陆地上生活, live in the sea在海里生存, grow into forests长成森林, produce young生出幼仔, lay eggs下蛋, animals with hands and feet长着手脚的动物, spread all over the earth遍布全世界, develop new methods发展了新的方法, grow food种植, move around迁徙, go by过去，推移, take care of…在意……，照看好……, put…into…把……带入，放入……, prevent…from…防止……做……, escape from… into…从……逃离到……, become hot变热, depend on….依靠，依赖，取决与……, solve a problem解决一个问题 3. Reading and understanding difficult sentences Skim the text and identify the difficult sentences of each paragraph. You may put your hand up if you have any questions.
4. Reading and transferring information
Read the text again to complete the table below, HOW LIFE BEGAN ON THE EARTH What was the earth like after the “Big Bang”? Why was the earth different? How was life developed on earth? What did small clever animals do?