1、Unit 4How Life Began On The Earth,Warming-up and Reading,恒星star:本身能发出光和热的天体,如the Vega & the Sun。过去认为这些天体的位置是固定不动的,但实际上恒星也在运动。行星Planet :是本身不发光发热，且围绕着恒星转的天体。Nine planets卫星Satellite :按一定轨道绕行星运行的天体，本身不能发光。The moon is a satellite of the earth.月球是地球的卫星。彗星comet:通称扫帚星，当它运行的轨道部分靠近太阳时经常出现长长的彗尾。Halleys Comet 哈
2、雷彗星,the Milky Waythe Galaxy,The Solar System,How many planets are there in the solar system?,A Test,Mars火星,Saturn土星,Venus金星,Mercury水星,Uranus天王星,Neptune海王星,Pluto冥王星,Jupiter木星,Earth,How many planets are there in the solar system?,My Very Earnest Mother Just Served UN a Pizza,Mercury（水星）,Venus（金星）,Eart
3、h,Mars（火星）,Jupiter（木星),Saturn（土星）,Uranus（天王星）,Neptune（海王星）,Pluto（冥王星）,Black holes,Pangu separates the sky from the earth,Pangu turns into a myriad of things,Nuwa makes men,Some ideas about the beginning of the universal 宇宙,Examples: 1. PanGu separates the sky from the earth 盘古开天地 2. PanGu turns into
4、 a myriad of things 盘古化生万物3. NuWa makes men 女娲造人,Are these scientific ideas?,The Big Bang宇宙大爆炸,Do you know what a scientific idea is?,把当作太阳系总有一天；及时一般地说来信赖；取决于目前,现在做出选择现存的；存在的9. 对有害10.阻止，制止11. 和一样好，又，也,think of asThe Solar Systemin timegenerally speakingdepend on at presentmake choices in existencebe
5、 harmful toprevent/keep/ stopfromas well as,12.允许某人做某事13.把装满14.是由导致15.成为一部分16.太多的二氧化碳17.从他们身体内部18.按计划/ 安排要做19. 冷却、降温20. 下蛋21. 随着时间流逝22. 全球变暖,allow/permit sb to do sth fillwith be caused by become/ be part of too much carbon dioxide from within their bodies be to do cool down lay eggs As time went by
6、 global warming,1. 随后它会变成什么曾经是一个谜，直到最后这团尘埃开始慢慢地合成一个环绕太阳运转的球状物。 What it was to become was a mystery until the dust began to slowly combine into a ball moving around the sun. 2.问题是地球（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。 The problem was that the earth became violent because it was not clear whether the solid
7、shape was to last or not.,3.它使得地球得以把曾经存在于大气层中的有害气体，溶解在海洋里。 It allowed the earth to dissolve harmful gases, which had become part of the earths atmosphere, into the oceans and seas. 4.在未来的千百万年中，生命能否在地球上延续将取决于这个问题能否得到解决。 Whether life will continue on the earth for millions of years to come will depend
8、 on whether this problem can be solved.,Difficult Sentences: 地球猛烈爆炸起火, 并喷涌出岩石，这些最终又产生了水蒸气、二氧化碳、氧、氮和其他气体，它们后来构成了地球的大气层。 It exploded loudly with fire and rocks, which were in time to produce the water vapour, carbon dioxide, oxygen, nitrogen and other gases, which were to make the earths atmosphere.,1
9、. Listening :Listen to the tape and answer the following questions,1) Why do many people think that water was important for the beginning of life?2) How do human beings make the earth become warmer and warmer?,1) Because it allowed the earth to dissolve(溶解） harmful gases into the oceans and seas. 2)
10、 They are putting too much carbon dioxide into the atmosphere.,back,2. Reading comprehending: read the text carefully and finish exercise1 and 2 on page 26 and page 27,Answers: 1. B C B B2. D B I G E H A C F J,1. Whats the main idea of the text?,How life began on the earth.,2. How many parts can the
11、 text be divided into?,(para 1)(para2.3.4),Part 1: the appearance of water,Part 2 The development of living things.,向某人解释某事迫使某人做某事靠近；接近感到高兴/振奋爆发在阴凉处给某人拍照既然；由于向前走掉到地上,explain sth. to sb. force sb. to do sth. get/be close to cheer upbreak out in the shadetake photos of sb. now that step forward fall to the ground,
