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Unit 4 Astronomy: the science of stars教案unit4astronomy:thescienceofstars教案teaching aims:1. talk about the science of stars2. practise giving instructions teaching difficulties:1. learn to use noun clauses as the subject2. learn to write an essay to show your problems and the way to overcome them.3. vocabulary: astronomy, atmosphere, violent, explode, surface, disappointed, gradually, cheer, mass, harmful, presence, in time, preve nt …from… depend on, now that, get the hang of, break outteaching procedures:the first period intensive reading step ⅰ presentationt: hello, everyone! today we will come to unit 4, astronomy. before that i have a question: where do we come from? or we can say: who are our ancestors?s1: monkeys!s2: beijing ren who lived many years ago.s3: dinosaurs…t: very good! do you know what it was like before life appeared on earth?s4: full of water…bs: i don’t know.t: do you want to get more information?ss: yes, we do.t: today we will learn something about how life began on earth. turn to page 25. let’s come to warming up first.step ⅱ warming up1. read the three questions, while the students listen and follow.2. give the students several minutes to discuss the questions.3. collect answers from the class.4. check answers while discussing.step ⅲ pre-readingget the students to discuss the questions on page 25 with their partners. then ask the students to tell their stories. encourage them to tell different stories, if they don’t know any, tell them some.t: now discuss these questions with your partners. then i will ask some of you to tell us your stories. are you clear?ss: yes.a. do you know each religion or culture has its own ideas about the beginning of the universe? give an example if you know.b. do you know what a scientific idea is?read some stories to the students.pangu separates the sky from the earth;the biblical account;india;japan;europe;…step ⅳ reading1. scanningget the students to read the passage quickly and accurately and meanwhile help the students to form a good habit of reading. give the students a couple of minutes to look throuth the whole passage. tell them to read silently and then ask some detailed questions about the text. encourage them to express their ideas. t: we are going to learn a passage about how life began on the earth. now read the text quickly and then answer my questions.a. what was there on the earth before life began?b. why do scientist think there has never been life on the moon?c. why do animals first appear in the sea?d. why do green plants help life to develop?e. why were mammals different from other animals? discuss the answers with the whole class.2. skimmingin this part, students will read the text again and finish part 1,2,3t: now skim the passage fast to finish part1,2,3,4 then we will check the answers together.key to part 1: dbigehacfjdiscuss the rest with the students.step ⅴ listeninglisten to the tape for the students to follow and have further understanding of the passage.t: read after the tape, then answer me some questions with your book closed.a. how did water come into being on the earth?b. why is water important on earth?step ⅵ language pointst: turn to page 25. let’s look at the sentences:a. it exploded loudly with fire and rock, which were in time to produce the water vapour.which leads non-restrictive attributive clause.in time: sooner or later; eventuallyi will see him in time.in time ( for sth/to do sth): not lateshe will be back in time to prepare dinner.in/out of time: in/not in the correct timethe audience clapped in time to the music.b. nobody knew that it was going to be different from other planets going around the sun.be different from: not like someone or something else in one or more wayscity life is quite different from country life.c. whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.to come: serves as attributiveshe is the last person to do such a thing.depend on: something might only happen or be true if the circumstances are right for itour success depends on whether everyone works hard or not.d. walking does need a bit of practice now that gravity has changed.now that: because of the fact thatnow that i am free, i can enjoy music for a while.now that you have grown up, you can decide it by yourself.step ⅶ homework1. retell the passage2. remember important language pointsthe second period language studystep ⅰ revision1. check retelling of the passage2. translate the following sentences.a. 你迟早会胜利的.b. 我的车与你的不一样.c. 站在门旁边的那个人是谁?d. 他总是第一个来,最终一个走.e. 既然你已经长大了,你自己确定吧. suggested answers:a. you will succeed in time.b. my car is different from yours.c. who is the person standing by the door?d. he is always the first to come and the last to go.e. now that you have grown up you can decide it yourself.step ⅱ word studythis part is a consolidation of the words learnt in this unit. ask the students to do the exercises individually.a. page 27. first let students finish part 1,2b. check the answers with the whole class.c. give students 3minutes to finish part 3.d. let the students read part 4 for a while and finish it.e. turn to page 63. first let the students finish 1and 2 and check the answers.step ⅲ preparationshow some sentences on the blackboard.a. a tree has fallen across the road.b. you are a student.c. to find your way can be a problem.d. smoking is bad for you.e. “how do you do?” is a greeti ng.f. what she said is not yet known.g. that we shall be late is certain.h. it’s certain that we shall be late .t: what part does the underlined part serve as in eachsentence? or find its subject in each sentence.step ⅳ grammar1. give the students some time to find the sentences in the passage. the collect answers from the class.2. show typical examples of how to make a subject clause. guide the ss to find out what changes we have to make when we make a sentence or combine two sentences using subject clause. teacher shows the example and ss write down the sentences.3. turn to page 64. read the following passage quickly and finish the eight sentences.4. have a discussion in pairs. the topic is my dream. one talks about the problems in his study or life, another gives some advice. remind the students to use the following structuresa. my problem is…b. my trouble is…c. the question is…d. my advice is…e. what i think about it is…f. the fact is…g. my suggestion is…step ⅴhomework1. finish part 3(p23)2. finish part 3(p64)added material:什么是黑洞？就是在宇宙中有那么一些点，这些点的体积趋向于零而密度变得无穷大，由于具有强大的吸引力，物体只要进入离这个点必须距离的范围内，就会被这个强大的引力汲取掉，连光线也不例外。
Unit 4 Astronomy：the science of the stars 课文知识点解析Warming UpDiscuss in pairs which science subjects are part of medicine,biochemistry,geophysics or astronomy.分组讨论哪些科学科目是医学，生物化学，地理学或天文学的一部分。
in pairs=two at a time=in twos一次两个，两个一组e.g.Shoes and slippers are sold in pairs.鞋子都是论双卖的。
注意：in+数词/名词（数词/名词以复数形式）e.g.in threes and fours 三三两两的in groups 成群的思维拓展in在这里表示：以……数量/形式、形状等。
e.g.Tourists queue in thousands to see the tomb. 游客数以千计排着队看陵墓。
Reading1.The problem was that the earth became violent because it was not clearwhether the solid shape was to last or not.这一问题变得越来越不确定，因为这一球体形状是否能够维持尚未明朗。
(1)violent adj. 猛烈的；激烈的；强暴的a violent language 激烈的语言a violent storm 猛烈的风暴a violent 猛攻思维拓展violence n.［U］1.暴力，强暴2.猛烈，剧烈，强烈(2)whether...or not... “是……还是……”在这里是主语从句,它还可以引导宾语从句、表语从句、同位语从句和状语从句。
e.g.I don’t know whether he will agree with me.（宾语）我不知道他是否同意我的观点。
---------------------------------------------------------------最新资料推荐------------------------------------------------------人教版高中英语必修三课文翻译人教版高中英语必修三课文翻译人教版高中英语必修三课文翻译译篇一：人教版高中英语必修三课文翻译4-5 Unit 4 Astronomy:the science of the stars Reading 地球上生命的起源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，一种普通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。
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，一种普通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。
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1/ 26在下去。
它（地球）猛烈的爆炸喷出了烈火与岩石。
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。
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。
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。
在火星这些其他行星上都出现了水，但和地球不同的是，这些水后来都消失了。
（新人教版）高中英语必修三《Unit4Astronomy the science of the stars》精品教案Teaching aims:1. Enable the students to learn the usage of key words and phrases and find the rules of the subject clause2. Get the students to cultivate the awareness of protecting the earth Teaching important/difficult points: The subject clauseTeaching methods:Help the students practice learning about language, using a co-operative method.Teaching aids: A multiple-media computer & a blackboardTeaching procedures:Step I Review the important phrases in the text.1.向四面八方_____________2.及时，终于____________3.冷却；平静下来______________4.与…不同_____________5. 依赖…；决定于…____________6. (除... 之外)也，又____________7.成长为，渐成，变为__________ 8.下蛋______________9.产生，分娩______________ 10.轮到某人，接着____________11. 阻止…____________ 12.作为... 的结果，由于__________Step nguage points:1. It exploded loudly with fire and rock they were in time to produce the water vapour,….①in time: sooner or later; 迟早；最后。
Unit4 Astronomy：the science of the stars词汇篇____________________________________________________________________________________________________________________________________________________________________要求学生掌握本单元的重点单词、重点短语、重要词汇辨析并能熟练应用。
一、重点短语1.in time 及时；终于2. lay eggs下蛋3. give birth to 产生；分娩4. in one’s turn 轮到某人；接着5. prevent... from 阻止；制止6. block out 挡住（光线）7. cheer up 感到高兴，感到振奋8. now that 既然；因为9. break out 突发；爆发10. watch out密切注视，当心二、词义辨析1. collide属正式用词，常与不及物动词，可与with搭配，其名词为collisioncrash属普通用词，可作名词、及物动词和不及物动词，作不及物动词时常与介词into搭配2. break out指灾难性的事件，如战争、火灾、疾病等的爆发happen强调事件发生的偶然性come about常指不受控制的事情的发生，相当于。
常用句型：How does/did it come about…? ·····是怎样发生的？3.lie，lie ，lay 的区别如下:三、要点梳理1. in time及时；终于；迟早；最后on time准时；按时in no time 立即；马上at a time依次；每次；逐一at one time曾经；一度at no time从不at the same time同时in time for刚好赶上2.atmosphere(n.)大气层；空气；气氛atmosphere作为“大气层、大气”讲时常与定冠词the搭配；作“气氛、氛围”讲时常与不定冠词搭配；作先行词时，其后的定语从句如果缺少状语，引导词用where，如果缺少宾语或主语用that 或which。
3. harmful (adj.)有害的harmless (adj.)无害的harm (n.)伤害，损害ssful(adj.)222222222222222222222222222222222222222222222222222222222222222222222222222222 2222222222222222222222222222222222222 be harmful to=do harm to对······有害do more harm than good弊大于利There is no harm in doing sth. =It does no harm to do sth.不妨做某事；做某事没坏处mean no harm无恶意4. vt.+it+adj./n.+(for sb./sth.) to do sth.在这个句型中，形容词或名词作宾语补足语，it是形式宾语，真正的宾语是后面的不定式短语，也可以是动名词短语或that从句。
可用于该句型的动词通常有make，think，consider，find ，feel，judge等E.g. I don’t think it worthwhile going to such a place.到这样一个地方去，我看是不值得的。
5. multiply (v.)乘以；乘；迅速增加；（使）繁殖multi-为一前缀形式，意为“多个，许多”常构成名词和形容词multicultural (adj.)多元文化的multimedia (adj.)多媒体的；使用媒体的(n.)多媒体multinational (adj.)跨国的；涉及多国的multiparty (adj.)多党派的6. exist (vi.)存在；生存existence (n.)存在，生存existon 靠······生存，生活in existence现存；现有come into existence出现；开始存在7. thus (adv.)这样；以此方式；因此；从而“thus+分词短语”常置于句末作结果状语，翻译时常用“因而”、“所以”、“于是”、“便”等词语。
这种分词短语的逻辑主语不是句子的主语，通常是前面的整个句子，因而它的作用相当于一个非限制性定语从句。
E.g. Some new machines were installed in our factory，thus resulting in an increase in production.我们的工厂安装了一些新机器，因而增加了产量。
8. in one’s turn轮到某人；接着in turn依次，轮流；相应地；转而take turns in doing /to do sth.轮流做某事on the turn即将变化give sb. a turn使大吃一惊the turn of the century世纪之交E.g. When it was in my turn，I was too excited to speak.当轮到我时，我激动得都说不出话来了。
9. prevent/stop sb. (from) doing sth. 阻止某人做某事(在主动句中from可以省略，被动句中不可省略) keep sb. from doing sth.（from不可省略）protect …from 保护·····免遭10. puzzle(vt.)&(vi.)（使）迷惑；（使）为难；(n.)难题；谜puzzle over/over sth.苦苦思索，仔细琢磨be puzzled about /as to对·····感到迷惑a puzzled look/expression迷惑的表情a crossword puzzle纵横字谜puzzled (adj.)（感到）迷惑不解的，常用来修饰人puzzling (adj.)令人迷惑不解的，常用来修饰事物11.crash(vi.)&(vt.)碰撞；坠落air crash飞机失事crash into撞在·····上12. block out挡住；遮住（光线或声音）；忘掉；抹去（不愉快的事情）block in画（某物）的草图block off封锁，封闭（道路）block up塞住，封住（孔，洞）block one’s way挡住某人的去路13.pull(n.)&(vt.)拉（力）；拖；牵引力pull back撤退pull ahead抢先；领先pull in（车）进站停靠pull out驶离车站pull over把（车）开到路边pull up使车停止，停下pull down 拆毁，拆掉（建筑物）pull through（使）恢复健康14. cheer up感到高兴；感到振奋cheerful (adj.)快乐的，高兴的cheers（用于祝酒）干杯cheer sb. on为某人加油；鼓劲give a cheer欢呼起来15. 倍数表达法倍数表达方式：“A +be+倍数+as+形容词或副词的原级+as +B”表示“A是B的多少倍”“A +be+倍数+as+形容词或副词的比较级+than +B”表示“A比B大多少倍”“A +be+倍数+the size/height/length/width，etc.+of +B”，表示“A是B的大小/高度/长度/宽度等多少倍”16.now that既然常见的表示原因的连词：in that因为，原因是seeing that由于，因为17. break out（战争、火灾、疾病等）突发；爆发break away (from)脱离；突然挣脱break through突围，突破；克服break sth. up拆开；打散；结束（关系等）break in强行进入break into强行闯入；突然开始break off断开；中断break down出故障；垮掉18. watch out for当心；提防；密切注意watch out=look out当心，小心watch out for=look out for当心、提防Watch it! 小心！留神！watch over sb./sth.照管某物/照顾某人keep watch守护，监视on watch值班watch the clock盯着钟表watch the time注意时间watch the world go by闲看人来人往19. depend on sb =rely on / count on sb./believe in sb./trust (in) sb. 信任/依赖某人It (all) depends 看情况而定20. 与get相关的短语:get along 相处融洽，进展等get down to 开始认真对待，考虑get on 上车get through 到达；通过；办完，get to 到达1.（2019河北衡水中学调研）The hotel is always full of people because it offers a lovely relaxed______ and personal service.A. appearanceB. adventureC. amountD. atmosphere2.(2019山西康杰中学月考)Nobody was clear about how exactly he had managed to______such a large amount of money in such a short time.A. increaseB. accumulateC. multiplyD. commit3.(2019安徽)My good performance in the job interview left me ________ about my future and about whatI can do here.A. puzzledB. sensitiveC. optimisticD. embarrassed4.(2019江苏无锡月考)Mr. Brown’s condition looks very serious and it is doubtful if he will________.A. pull backB. pull upC. pull throughD. pull out5.(2019安徽)---I get at least half an hour of exercise almost every day.---Oh great! ______.A. Good luckB. Cheer upC. Same to youD. Keep it up基础演练根据汉语提示或首字母提示用本部分所学的单词填空1. Ais the scientific study of the sun，the moon，the stars and so on.2.The project cost us more than one ____（十亿）dollars.3. The a at home was rather tense.4.His________（根本的）mistake was to rely too much on other people.5.O________ is a gas that is present in air and water.6.Man-made ________ （卫星）are used for sending and receiving messages.7.Anything that is dropped falls towards the centre of the earth because of the pull of ________ （重力）.8. Global warming and ________（气候）change problems are perhaps the two greatest threats to our planet.9.She was unbelievably ________（温和的）with him during his illness.10. A rare virus just attacked my computer s_____，so it has broken down.11. The ______ (puzzle) look on her face suggested she didn’t understand what I had said.12. Not a few ________ (violence) scenes had been cut from the film before it came to show..13. Smoking can be ________ (harm) to your health.14. Five ________ (multiply)by four equals twenty.15. The naughty boy________ (lie) to me that the hen had______ (lay) three eggs the day before.巩固提高选择适当的单词填空1.Buddhism is one of the world’s________ and one of its famous ________buildings in China is the Potala Palace in Tibet.(religions；religious)2.This girl looked very much_________her mother.However，________the girl of her age，she dreamed ofbecoming a physicist. (unlike；like)3. Some dinosaurs were very large but__________. Young dinosaurs were treated very ________until they become adults. (gently；gentle)4. I didn’t know his ________until today. He can’t ________on the money he is earning and has to beg from door to door.(exist；existence)5. Her ________look on her face suggested she didn’t understand the ________problem.(puzzling；puzzled)一、用所给词的适当形式填空1. Scientists have many theories about how the universe first came into _______ (exist)2. His advice prevented me from_______ (make) a serious mistake.3. There wereseveral _______ (theory) about the way in which the first started.4. I felt _______ (physical) sick before the exam.5. Beautiful music came________ (float) out of the window.二、用所给短语补全句子1. If you keep on learning English，you’ll be able to speak it quite fluently________.2. The expected storm ________us ________climbing the mountain.3. The good news of our football team winning the game _________everybody.4. _________everyone agrees to my plan，let’s start tomorrow.5. Whether our experiment will be successful _______whether we are patient enough.6. Mrs. White _________a healthy baby at her late thirties.7. The staff were asked _________fake bank credit cards.8. It was almost midnight when the fire _________in the neighborhood.9. He asked each of us _________to describe how alcohol had affected our lives.10. A heavy curtain was put up to _______ the night.__________________________________________________________________________________________________________________________________________________________________一、语法填空阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
