新课标人教版高中英语必修3Unit4AstronomyWarmingupreading课件.pptx

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1、1.Whats the meaning of the word“Astronomy”?I.Warming upthe 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 sun/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?第1页/共32页Scienti

2、sts now think Pluto is too small to be called a planet.第2页/共32页The Solar System1111第3页/共32页5.The names of eight planets.MercuryVenusEarthMarsJupiterSaturnUranusNeptune1)水星2)金星3)地球4)火星5)木星6)土星7)天王星8)海王星商业之神”和“旅行之神”爱与美之神该亚战神天神农业之神宇宙之神海神第4页/共32页Mercury Venus Earth Mars Jupiter Uranus Saturn Neptune6.Pu

3、t them in correct order on P25.Do you know their origin?第5页/共32页II.Pre-reading1.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 p

4、uzzles.Do you know the names?第6页/共32页盘古开天辟地 女娲补天造人 4.In the western culture,who creates everything in the world?第7页/共32页III.Fast-reading1.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

5、 predict that the text may tell us the origin of life on the earth.第8页/共32页Paragraph 1:Paragraph 2:Paragraph 3:Paragraph 4:Paragraph 5:D.A widely accepted theory about the formation of the universeC.The formation of the earth A.The importance of water for lifeB.The development of plants and animals

6、on the earthE.The arrival of humans and their impact on the earthRead quickly and match the main idea of each paragraph第9页/共32页 Detailed reading This text can mainly divided into two stagesStage 1:The development of the earthStage 2:The development of life(para 13)(para 45)第10页/共32页Stage 1:The devel

7、opment of the earth(1)After the Big Bang,what was the earth like?a cloud of dust a solid globe 第11页/共32页exploded with fire and rock produced water vapour and gases(2)What happened next?第12页/共32页(3)What did the water vapour and gases form?the earths atmosphere第13页/共32页 Water appeared(4)What appeared

8、as the earth cooled down?water is important for the beginning of life on the earth.第14页/共32页 Why is water so important for the beginning of life?Because water allowed the earth to dissolve harmful gases into oceans and seas.第15页/共32页Stage2 The development of life第16页/共32页 small plants appears in wat

9、er 1.What life developed after water appeared?第17页/共32页Shellfish and all sorts of fish 2.What life developed in water next?第18页/共32页 green plants began to grow on land insects appeared3.What about the life on land?第19页/共32页amphibians on land and in the waterforests4.What life developed next on land?

10、第20页/共32页 reptiles appeared dinosaur developed 5.What life developed after forests appeared?第21页/共32页mammals on land6.What life developed after dinosaurs?第22页/共32页 small clever animals7.What life developed after mammals?第23页/共32页 1.Who are the small clever animals with hands and feet?2.Are they taki

11、ng care of the earth well?Why?第24页/共32页 Because they are putting too much carbon dioxide into the atmosphere,which prevents heat from escaping from the earth into space.The earth may become too hot to live on.第25页/共32页 The earth is becoming hotter and hotter!第26页/共32页Can you fill in the blanks?23456

12、789101 small plants in watershellfish and all sorts of fish insectsinsects reptiles reptilesamphibiansmammalsdinosaurs humansplantsanimalsGreen plants on landforests第27页/共32页1.Insects and amphibians appeared.3.The earth became a solid ball.5.Reptiles appeared.7.The earth was a cloud of dust9.Shellfi

13、sh and other fish appeared.11.Clever animals with hands and feet appeared2.Dinosaurs appeared.4.Small plants grew on the water.6.Plants began to grow on dry land.8.Water appeared on the earth10.The universe began with a“Big Band”.12.Mammals appeared.831091151741262Can you put the order of developmen

14、t of life into a time line?Ex.2 on P27第28页/共32页summaryAfter the“big bang”,the earth was still just a cloud of _,it _loudly with fire and rock,which were _ to produce the_,water vapour and other gases.Then _ began to appeared on the earth.dustexplodedin timecarbonwater第29页/共32页 _ in water are conside

15、red to be the earliest lives on the earth.The O2they supplied encouraged the lives of_.Slowly green plants grew on land,which were followed by _like insects&_.When the plants grew into_,_ appeared.Then _ developed but disappeared later,which made the rise of a totally different animal,_,possible,and finally _ spread all over the world.shell-fish and fishamphibiansforestsreptilesdinosaursmammalhumansThe small plantsland animals第30页/共32页 1.Finish the exercise 1and 2 on page 63 2.Read the text again and find out your difficult points.Homework:第31页/共32页感谢您的观看！第32页/共32页