外研版八年级下册英语同步教学课件-M3U2

1、外研版八年级下册英语同步教学课件-M3U2外研版八年级下册英语同步教学课件-M3U2The earth is a _ and it _ the sun. Scientists think that there has been life on the earth for _ years. Lead inplanetgoes aroundhundreds of millions ofHowever, have we found life on any other planets yet?The earth is a _ and it _Unit 2We have not found lifeon

2、 any other planets yet.Unit 2We have not found lifeon The sun and its planets are called _The earth is a _ and it goes around the sun. _ other planets go around the Sun.planet Seventhe solar system 太阳系 The sun and its planets are cthe Galaxy / the Milky Way 银河系There are _ stars in the Milky Way.bill

3、ions ofOur solar system is a small part of _. 太阳系the Milky Way = the Galaxy银河系the Galaxy / There are _It is _ to imagine.宇宙galaxiesimpossibleScientists have discovered many other_ in the universe.So how large is the universe?It is _ to imagine.宇Scientists have sent _to the planet Mars to take photos

4、. spaceshipsThey have even sent spaceships _(travel) outside the solar system.to travelScientists have sent _Look at the picture and talk about what you know about Chinese spaceships.Shenzhou-9 is a manned spaceship. Liu Yang Jing Haipeng Liu WangLook at the picture and talk a外研版八年级下册英语同步教学课件-M3U2 1

5、. Anyone out there? 2. Life on the earth 3. The sun and other stars 4. The stars at night Read the passage and choose the best title for it. Read the passage and choose The 1st Para. Questions:1.How long has there been life on the earth? 2.Have we found life on any other planets yet?There has been l

6、ife on the earth for hundreds of millions of years. No, we havent.The 1st Para. Questions:There The 2&3rd Para. 2.Put the words and expressions from the smallest to the largest :_ A. galaxy B. planet C. solar system D. star E. universeBDCAEWhich is true?A: Seven planets go around the sun.B: there ar

7、e only stars in the galaxy.C. The solar system is larger than the galaxy.D: the Environment of the earth is different from that other planet in the solar system.The 2&3rd Para. 2.Put the word Spaceships have travelled to _ and_. But not travelled _yet, because it is too_.The 4th Para.the planet Mars

8、outside the solar systemother stars in our GalaxyfarThe 4th Para.the planet MarsouThe 5th Para.Have scientists discovered any life in outer space yet?No, not yet.Is there life out the solar system in space? We do not know the answersyet.The 5th Para.Have scientists d1. The earth is a star.2. The sun

9、 is a star.3. There is more than one galaxy in the universe.4. The light from the stars in other galaxies has travelled for a long time to reach us.5. Scientists have received many messages from space.6. Scientists have visited most of the universe.Check the true sentences:Memory test1. The earth is

10、 a star.Check tScientists think that there has been life on the earth for hundreds of millions of years. However, we have not found life on any other planets yet.在地球上成百上千数百万亿万Scientists think that there haThe earth is a planet and it goes around the sun. Seven other planets also go around the sun. N

11、one of them has an environment like that of the earth, so scientists do not think they will find life on them. The sun and its planets are called the solar system, and our solar system is a small part of a much larger group of stars and planets, called the galaxy or the Milky Way. There are billions

12、 of stars in the Galaxy, and our sun is only one of them.绕着转它们中没有一个be called 被叫做太阳系一小部分一个大的多的星群银河几百亿之一none of 表示（三个以上）一个也没有。做主语时，谓语动词可用单数或复数The earth is a planet and it gScientists have also discovered many other galaxies in the universe. They are very far away and their light has to travel for many

13、 years to reach us. So how harge is the universe? It is impossible to imagine.在宇宙里不得不这简直无法想象It is +adj for sb. to do sth.reach =arrive at/ in+地点=get to Scientists have sent spaceships to the planet Mars to take photos. They have even sent spaceships to travel outside the solar system. However, no sp

14、aceship has travelled far enough to reach other stars in our Galaxy.send sth to sp.发送到拍照片太阳系adj./ adv enough to do sth足够做某事Scientists have also discovereScientists have always asked the questions: with so many stars in the universe, are we alone, or is there life out there in space? Have there been

15、visitors to the earth from other planets? Why has no one communicated with us? We do not know the answersyet.with + 名词 + 介词短语，表示伴随情况，意思是“有”。 在太空中 其他行星 没人 no one表示“没有人”，作主语时，谓语动词常用单数形式。communicate with sb. 与联系/交流Scientists have always asked tSpaceships from the earth have done surveys of the other pl

16、anets, but they have not found any life there. Why has no one from other planets tried to (4) _ with us? It is true that scientists have not discovered life on other planets in the (5)_ yet, but some scientists believe that they will find it some day.Complete the passage with the words and expressio

17、n in the municate environment none solar system universe Is there life on other planets? There are seven other planets in our (1) _, but (2)_ of them has a(n) (3)_ like that of the earth. solar systemnoneenvironmentcommunicateuniverse Spaceships from the earth have1.成百万年 2.在其它的行星上 3.绕太阳转 4.他们中没有人 5.

18、被叫做 6.太阳系 7.一小部分 8.几十亿的星星 9.在宇宙中 10.许多其他的星系11.距离好远 12.不得不，必须13.足够远 14. 如此多 15.和某人联系 millions of years on any other planetsgo around the sunnone of thembe calledthe solar systema small part ofbillions of starsin the universemany other galaxiesfar awayhave/has tofar enoughso manycommunicate with sb.ph

19、rases Key1.成百万年 millions of years 1.This city _(call) Hangzhou.2. The boy is old enough _(look) after himself3. It is impossible _ (finish ) work today.4. None of them _(come) from China.5. China has _(billion) of people.6. The Sun _(not go )around the earth.7. _the Scientists _(send) spaceship to t

20、he moon yet?8. We sent the spaceship to planets _( discover) life .9. One of _(galaxy) is the milky galaxy.10. China _(send) spaceships tens of years ago.is calledto lookto finishcomesbillionsdoesnt goHave sentto discovergalaxiessent1.This city _(call) Ha注意：none 与no one（nobody） 的区别：none既可指人也可指物，通常与表

21、范围的of 短语连用；no one(=nobody)只能指人，不能与of 短语连用。如：_ of the reasons was true. A. None B. No one C. All (2) none与数量有关，可回答how many问句，表示“一个也没有”；而no one表示“什么人也没有”，可回答who问句。如： -Who are you speaking to?-_.-How many students are there in the room?-_.ANo oneNone注意：none 与no one（nobody） 的区别：(2that是指示代词。为避免重复，可用 that

22、 或 those 来代替前面已提到过的人或事物； The air in the countryside is fresher than _in the city. The streets in the city are wider and the buildings are taller than _ in the county.The environment is much cleaner than _ in the city. thatthosethatthat是指示代词。为避免重复，可用 that 或 thos2. However, no spaceship has traveled f

23、ar enough to reach other stars in our Galaxy. 然而，没有一个航天器去到足以到达我们银河系其他恒星那么远的地方。 enough to do adj./ adv. + enough + to do sth. 足够，可以 not + adj./ adv. + enough + to do sth. 不够，不可以 (1) 我们有足够的钱花。 We have _. (2) 他跑得够快，很快追上了我们。 He ran _ catch up with us soon. (3) 他年龄不够大，照顾不了自己。 He _. enough money to spendf

24、ast enough toisnt old enough to look after himself2. However, no spaceship has tWritingLook at the picture from a science story for children and answer the questions.WritingLook at the picture froWhat have the scientists just received?(a message from one of our spaceships)They have just received a message