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1、Module III Unit 4,Astronomy,抄写,as a result结果 as a result of.由于.的结果 too.to.太.而不能. depend on依赖，取决于 look after照顾 prevent.from(doing).阻止.做. escape from.逃离. in ones turn轮到某人，接着,be different from.与. 不同 give birth to.产生；分娩 lay eggs 下蛋 allow doing 允许做某事 allow sb. to do 允许某人做某事 be allowed to do 被允许做某事 be fun
2、damental to 对.是重要的 in time 及时 on time 按时 according to 根据 begin with起源于 in all directions=朝四面八方,Whats the meaning of the word “Astronomy”?,I. Warming up,the science of stars; the scientific study of stars and planets.,2. What words will you think of when we talk about this topic?,star, planet, the su
3、n / moon / earth, solar system,恒星 行星 太阳 月球 地球 太阳系,3. How many planets are in the solar system?,8,Pluto,Scientists now think Pluto is too small to be called a planet.,The Solar System,1111,5. The names of eight planets.,Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune,1) 水星 2) 金星 3) 地球 4) 火星 5)
4、 木星 6) 土星 7) 天王星 8) 海王星,II. Pre-reading,Have you ever asked your mother, “Mom, where do I come from”?,2. Nearly everybody has this or that puzzles: How do human beings come into being? How does the earth come into being?,3. In China, there are two legends about these puzzles. Do you know the names?,
5、盘古开天辟地 女娲补天造人,4. In the western culture, who creates everything in the world?,The God,III. Fast-reading,Do you believe in such stories? Are they based on science?,2. In this unit, well learn something more scientific. 3. Whats the title of the text?,4. From the title, we can predict that the text ma
6、y tell us the origin of life on the earth.,How life began on the earth,5.Lets enjoy a short video.生命进化史,HOW LIFE BEGAN ON THE EARTH 地球上生命的起源,No one knows exactly how the earth began, as it happened so long ago. However, according to a widely accepted theory, the universe began with a “Big Bang” that
7、 threw matter in all directions. After that, atoms began to form and combine to create stars and other bodies. 没有人确切知道地球是怎样开始形成的，因为在很早很早以前它就形成了。然而，一种普遍为人们所接受的理论是：宇宙起源于一次大爆炸，这次大爆炸将物质投射到四面八方。然后，原子开始形成并结合成恒星和其他天体。,1.according to 根据 2.widely accepted 广泛接受的 3.began with=start with 起源于，开始于 4.in all direct
8、ions=朝四面八方,句型 begin with/start with 以开始，从着手 仿写 认识从实践开始。 Knowledge_.,begins with practice,For several billion years after the “Big Bang”, the earth was still just a cloud of dust. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.
9、The earth became so violent that it was not clear whether the shape would last or not. It exploded loudly with fire and rock. 大爆炸后好几十亿年过去了，但地球还只是一团尘埃。随后它会变成什么没人能知道，直到38-45亿年前，这团尘埃才慢慢地形成一个固体的球状物。地球（开始）变得激烈动荡，不知道这个固体形状是否会继续存在下去。它（地球）猛烈的爆炸喷出了烈火与岩石。 It was not clear whether .“是否是不清楚的”，it 是形式主语，whether从句
10、为真正的主语，即Whether the shape would last or not was not clear.,what 引导的主语从句，what 作become 的表语，when引导的是定语从句， 修饰between 4.5 and 3.8 billion years ago。,一团,不确定的，certain确定的,vi.持续,vilent 激烈的，violence暴力,2. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into
11、 a solid globe.,_（使大家吃惊的是）is that he didnt come to the meeting.,What surprised everybody,2. _（他所做的） added to our difficulty.,What he did,_ we cant get seems better than _ we have. What; what B. What; that C. That; that D. That;what _ made the school proud was _ more than 90% of the students had been
12、 admitted to key universities. A.What;because B. What;that; C. That;what D.That;because,A,B,They were in time to produce carbon dioxide, nitrogen, water vapour and other gases, which were to make the earths atmosphere. What is even more important is that as the earth cooled down, water began to appe
13、ar on its surface. 最终产生了碳、氮气、水蒸气和其他多种气体，从而形成了地球的大气层。更为重要的是，地球冷却了下来，地球的表面就开始出现了水。 in time 及时；终于 in time to do sth 及时做某事，来得及做某事 on time 按时 What is even more important is that.更为重要的是. cool down 凉下来，冷却,定语从句,2. What is even more important is that as the earth cooled down， water began to appear on its sur
14、face.(P26 L13) 句式分析 句中what引导的是一个_，what 做从句主语，that引导的是一个_，as引导的是一个_ 。,时间状语从句,主语从句,表语从句,Water had also appeared on other planets like Mars but, unlike the earth, it had disappeared later. It was not immediately obvious that water was to be fundamental to the development of life. 在火星这些其他行星上都出现了水，但和地球不同
15、的是，这些水后来都消失了。水会对生命的发展起关键作用，这一点在当时并不明显。 be fundamental to 对.是重要的 It 是形式主语，真正的主语是that water was to be fundamental to the development of life. It is/was(not) obvious that. 是（不）明显的，如: It is no wonder that he has passed the exam.,What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas. This produced a chain reaction, which made it possible for life to develop. 很多科学家相信，由于地球表面上长期有水存在，它使得地球得 以把有害气体和酸性物质溶解在海洋里。这就产生了一系列的反 应，使得生命就有可能开始发展了。 the continued presence of water 水的长期存在 allow vt. 允许、许可、容许 allow doin
