Astronomythe science of the starsPPT教学课件

1、Warming up1.We usually think of science subjects as physics, chemistry, biology and mathematics. But some studies combine two or more of these subjects. Discuss in pairs which science subjects are part of medicine, biochemistry, geophysics or astronomy.第1页/共34页astronomy, biochemistry, geophysics, me

2、dicine1) the scientific study of treatment of diseases and injuries. _2) the study of the chemistry of living things. _ 3) the scientific study of the earths atmosphere(大气层), oceans and climate(气候). _ 4) the scientific study of objects in space, such as planets, stars, comets(彗星) and “black holes”._

3、medicinebiochemistrygeophysicsastronomy第2页/共34页2. What do we mean when we say we are studying a subject scientifically?Try to be objectiveSet out your idea to be testedDesign an experiment to test the ideaAnalyze the resultsDraw a conclusion第3页/共34页3.What are the most important skills we need to be

4、real scientists? accuracy a logical approach thorough writing of the experiment intellectual courage intellectual honesty第4页/共34页Pre-reading1.Pangu separates the sky from the earth2.Nuwa makes men3.The scientific idea第5页/共34页Reading 1.Listen to the tape with books closed and choose the best answers.

5、1)Why was the earth different from other planets?A.It produced a lot of heat.B.The water remained.C.Water disappeared.D.It was the oldest planet.B第6页/共34页2.Why was life able to develop on the earth but not on other plants?A.The earth had a solid shape.B.The earth did not have harmful gases in its at

6、mosphere.C.The water stayed on the earth but not on other plants.D.The earth was not too hot and not too cold.C第7页/共34页3.Why was it necessary for plants to grow before animals?A.Animals needed plants to protect them from the sun.B.Plants provided oxygen for animals to breathe.C.Animals could hide fr

7、om hunters in forests.D.It was easier for plants to grow.B第8页/共34页4. What problem is caused by human beings?A.They exist everywhere on the earth.B.They cause global warming.C.They find new methods of growing crops.D.They enjoy hunting and fishing.B第9页/共34页Read para.1 and answer the following questio

8、ns.1.How did water come into being on the earth?2.Whats the significance of the presence of water on the earth?The explosion of the earth produced water vapour, which turned into water when the earth cooled down.It allowed the earth to dissolve harmful gases into oceans and seas.第10页/共34页small plant

9、s in watershellfish and all sorts of fishgreen plants on landinsects (on land)forests reptiles (on land)dinosaurs (on land)mammals (on land)amphibian (on land and in water)Read para.2¶.3, filling in the chart.第11页/共34页Read the text again and try to put the order of development of life into a tim

10、e line.(A) insects and amphibians appear(B) a solid ball(C) reptiles appear(D) a cloud of dust(E) shellfish and other fish appear(F) dinosaurs appear(G) small plants grow on the water(H) plants begin to grow on dry land(I) presence of water(J) mammals (including humans) appear D-B-I-G-E-H-A-C-F-J第12

11、页/共34页Discussion第13页/共34页Language points1.in time : sooner or later; eventuallyeg. Ill see him in time. Youll learn how to do it in time. in time ( for sth/ to do sth) : not lateeg. She will be back I time to prepare dinner. The doctor came just in time.第14页/共34页2. to be to do : will definitely happ

12、en, or it must happeneg. They said goodbye, little knowing that they were never to meet again. As a young man he didnt know he was to win the world fame later on.3. allow to doeg. Her parents wont allow her to stay out later than 11:00 in the evening. 第15页/共34页allow doingeg. They shouldnt allow park

13、ing in this street. Its too narrow.4.encourage to do stheg. He encouraged me to learn dancing.5. Prevent (from) doing stheg. Nothing can prevent their plans (from) being carried out.第16页/共34页6. depend oneg. Our success depends on whether everyone works hard or not. - Will you go fishing this afterno

14、on? - Well, it all depends on the weather.第17页/共34页Discovering useful structures主语从句主语从句1 定义：用作主语的从句叫做主语从句。2 构成：关联词+简单句3 引导主语从句的关联词有三类：(1) 从属连词that。 如：That they were in truth sisters was clear from the facial resemblance between them.很明显，她们确是亲姐妹，她们的脸型很相似。that 引导主语从句时只起引导作用，本身无实引导主语从句时只起引导作用，本身无实际意义，

15、在主语从句中也不充当任何成分，但不际意义，在主语从句中也不充当任何成分，但不能省略。能省略。第18页/共34页(2) 从属连词whether。如：Whether hell come here isnt clear. 他是否会来这里还不清楚。3)连接代词who, whom, whose, what, which, whoever, whatever, whichever连接副词 where, when, how, why 。如： What she did is not yet known. 她干了什么尚不清楚。How this happened is not clear to anyone. 这

16、事怎样发生的，谁也不清楚。Whoever comes is welcome. 不论谁来都欢迎。Wherever you are is my home - my only home. 你所在的任何地方就是我的家-我唯一的家。第19页/共34页 4.主语从句可以用主语从句可以用it作形式主语，而将主语从句后作形式主语，而将主语从句后置。置。常以it作形式主语的句型有：A. It+be+形容词(obvious, true, natural, surprising, good, wonderful, funny, possible, likely, certain, probable, etc.)+t

17、hat从句。如：It is certain that she will do well in her exam. 毫无疑问她考试成绩会很好。It is probable that he told her everything. 很可能他把一切都告诉她了。第20页/共34页B. It+be+名词词组(no wonder, an honour, a good thing, a pity, no surprise, etc.)+that从句。如：Its a pity that we cant go. 很遗憾我们不能去。Its no surprise that our team should have

18、 won the game. 我们没赢这场比赛真意外。C. It+be+过去分词(said, reported, thought, expected, decided, announced, arranged, etc.)+that从句。如：It is said that Mr. Green has arrived in Beijing. 据说格林先生已经到了北京。It is reported that China has sent another man-made earth satellite into orbit.据报道中国又成功地发射了一颗人造地球卫星。第21页/共34页D. It+s

19、eem, happen等不及物动词及短语+that从句。如：It seems that Alice is not coming to the party at all. Alice似乎不来参加晚会。It happened that I was out that day. 碰巧我那天外出了。E. It+doesnt matter (makes no difference, etc.)+连接代词或连接副词引起的主语从句。如：It doesnt matter whether she will come or not. 她是否来这无关紧要。It makes no difference where we

20、 shall have the meeting. 我们在哪里开会毫无区别。第22页/共34页F. 当that引导的主语从句出现在疑问句中时，要以it作形式主语，而把主语从句后置。如：Is it true that the scientist will give us a lecture next week? 下周那位科学家将给我们作报告是真的吗？Does it matter much that they will not come tomorrow? 他们明天不来很要紧吗？G. 当主语从句出现在感叹句中时，要以it作形式主语，而把主语从句后置。如：How strange it is that

21、the children are so quiet! 孩子们这么安静真奇怪！第23页/共34页注意连接代词whoever, whatever, whichever等引导主语从句的含义Whoever comes will be welcome. (whoever=the person who) 来的人将受到欢迎。Whatever he did was right. (whatever=the thing that) 他所做的事情是正确的。Whichever of you comes in will receive a prize. (whichever=anyone of you who) 你们

22、当中不论哪个进来将会得到奖励。 第24页/共34页1.It worried her a bit _ her hair was turning grey.A.While B. if C. that D. for2._ well go camping tomorrow depends on the weather.A.If B. Whether C. That D. Where3. Does _ matter if he cant finish the job on time?A.this B. that C. he D. it C B D第25页/共34页4. _ he said at the

23、meeting astonished everybody present.A.The matter B. What C. The fact D. That5. _ the emperor saw was quite different from_ the old minister told him.A.What, that B. That, what B.C. Which, that D. All, all6. It is pretty well understood _ controls the flow of carbon dioxide in and out the atmosphere

24、 today.A. that B. when C. what D. how BD C第26页/共34页7. _ breaks his promise will not be trusted by his friends.A. Which B. Who C. Whoever D. Anyone8. I read about it in some book or other. Does it matter _ it was?A. where B. what C. how D. whichCD第27页/共34页3.What are the most important skills we need

25、to be real scientists? accuracy a logical approach thorough writing of the experiment intellectual courage intellectual honesty第28页/共34页4. What problem is caused by human beings?A.They exist everywhere on the earth.B.They cause global warming.C.They find new methods of growing crops.D.They enjoy hun

26、ting and fishing.B第29页/共34页Read para.1 and answer the following questions.1.How did water come into being on the earth?2.Whats the significance of the presence of water on the earth?The explosion of the earth produced water vapour, which turned into water when the earth cooled down.It allowed the earth to dissolve harmful gases into oceans and seas.第30