Unit4warmingupandreading高中英语人教版必修三课件(共44张).ppt-(课件无音视频)

1、Unit 4Unit 4 Astronomy:Astronomy:the science of the starsthe science of the stars Dan AmyBig banHave you heard of these terms?Black holeMilkyWaygalaxySolarsystemQuiz 1.Who wrote“The Origin of Species”(物种起源物种起源)?A.Newton B.Einstein C.Charles Darwin2.How many planets are there in the Solar System?A 7

2、B 8 C 9 4.Which one belongs to reptile?A.frog B.snake C.duck D.Fish E.birdF.dog3.Which one belongs to amphibian?5.Which one belongs to mammal?ABF6.Which gas is the most important for life?A.carbon dioxide(CO2)B.oxygen(O2)C.nitrogen(N2)Chinese legend:Pangu separates the sky from the earth Thedevelopm

3、entofthelifebreathwinds and cloudsvoice thunder left eye the sun right eye the moon blood the riversveins the roads Chinese legend:The Goddess Nuwa mended the heaven and created human beings from the clay(粘土粘土).Religious Beliefs According to Bible,God created the world in seven days.Day 1:God create

4、d Day and Night.Day 2:God created sky.Day 3:God created dry landthe earth,and seas.Day 4:God created great lights(the sun,the moon)and stars.Day 5:God created living things in the air and sea.Day 6:God created the land animals and the first man.Day 7:God rested and called this day Holy.Religious Bel

5、iefs first man,Adam and the first woman,EveReading Reading How Life Began on the EarthHow Life Began on the EarthReading Reading Reading How life began on the earthMainideaofeachparagraphParagraph1:Paragraph2:Paragraph3:Paragraph4:a.Theimportanceofwaterforlifeb.Thedevelopmentofplantsandanimalsonthee

6、arthc.Theformationoftheearthd.Awidelyacceptedtheoryabouttheformationoftheuniversedcab e.The arrival of humans and their impact on the earth Paragraph 5:e1.Big Bang2.a cloud of dust3.A solid globe4.exploded with fire and rock5.produce the water vapour,carbon dioxide-atmosphereHow did the earth come i

7、nto being?Para2,36.cooled down7.water appeared8.Dissolved harmful gases and acidThe development of lifeThe development of life Para4,5extremely small plantsFirstearly shellfishStage 1:The development of life in waterall sorts of fish green plants on land insects on landStage 2:The development of lif

8、e on land Nextamphibians on land and in the waterGreenplantsgrewintoforestsLater reptiles on land dinosaurs on land(1)What life developed after forests appeared?Afterthatmammals on land(2)What life developed after dinosaurs?small clever animals(3)What life developed after mammals?FinallyHow did the

9、earth come into being?How did the earth come into being?After a Big Bang of the universe,for billions of years,the earth was just a cloud of _,which settled into a solid _ later.The earth _ loudly with fire and rock,producing water _ and gases,which were to make the earths _.As the earth cooled down

10、,_ began to appeared on its surface,which was to be _ to the development of life.dustglobeexplodedvapouratmospherewaterfundamentalHow did life come into being?How did life come into being?Millions of years later,an extremely small _ appeared on the surface of water,followed by the development of _ a

11、nd all sorts of fish.Next,green plants began to grow on _,with which land _such as insects,amphibians appeared.When plants grew into _,reptiles and dinosaurs appeared.With the sudden _ of dinosaurs,mammals began their life on the earth.It was about 2.6 million years ago that _ _ came into existence.

12、plantsshellfishlandanimalsforestsdisappearancehumanbeings Work in pairs.Put the order of developmentof life into a timeline.10 73 8 4 9 6 1 5 2 12 111.Insects and amphibians appeared.3.The earth became a solid ball.5.Reptiles appeared.7.The earth was a cloud of dust.9.Shellfish and other fish appear

13、ed.11.Clever animals with hands and feet appeared.2.Dinosaurs appeared.4.Small plants grew on the water.6.Plants began to grow on dry land.8.Water appeared on the earth.10.The universe began with a Big Bang.12.Mammals appeared.1.Why was the earth different from the other planets?Because water remain

14、ed on the earth.2.Why did the plants grow before the animals came?Because plants provided oxygen for animals to breathe.3.Why is it wrong to show films with dinosaurs and people together?Because dinosaurs died out long before human beings developed on the earth.4.There used to be nine planets in the

15、 solar system.Recently scientists have decided that one of them can no longer be considered a planet.Do you know the name of that planet?Do you know why they removed it?The name is Pluto.Scientists now think it is too small to be called a planet.5.What problem is caused by human beings?Human beings

16、cause global warming.After the ,the earth was just .Slowly,it began to combine into moving around the sun.After it exploded loudly,the explosion produced ,_and other gases.“Big Bang”a cloud of dust carbon,nitrogenthe water vapour a solid globeRetell As the earth cooled down,_ began to appear on its

17、surface.Because of water and other useful gases,and later_ appeared.Many millions of years later,began to grow ,which led to the appearance of .watersmall plants grewshellfish and other fishinsects and amphibiansthe first plantson land When the plants grew into forests,.Later,.When they disappeared,

18、became more important.At last,_ _ have became the most important animals on the planet.reptiles appeareddinosaurs developed mammalshumanbeings()1.No one knows how the earth came into existence.()2.Stars and other bodies were created after a Big Bang of the universe.()3.After billions of years,the ea

19、rth exploded and produced gases,which were to become atmosphere of the earth.()4.There is water on earth as well as on Mars.SkimmingTrue or FalseTTTF()5.Plants appeared later than fish.()6.Land animals came into being as green plants began to grow on land.()7.Scientists have found out why dinosaur s

20、uddenly disappeared.()8.It was 2.6 million years ago that human beings appeared on the earth.FTTFPara.1 How the earth came into being.Para.2 The importance of water for life.Para.3 A theory about how the universe came into being.Para.4 The arrival of humans and their impact on the earth.Para.5 The d

21、evelopment of plants and animals on the earth.Put the correct time order of development of life1 Insects and amphibians appeared.2 Dinosaurs appeared.3 The earth became a solid ball.4 Small plants grew on the water.5 Reptiles appeared.6 Plants began to grow on dry land.scanning7 The earth was a clou

22、d of dust.8 Water appeared on the earth.9 Shellfish and other fish appeared.10 The universe began with a“Big Bang”.11 Clever animals with hands and feet appeared.12 Mammals appeared.10 7 3 8 4 9 6 1 5 2 12 11GroupDiscussion1.Whatproblemsarecausedbyhumanbeings?2.Howtosolvetheseproblems?Homework1.Findoutlanguagepointsandnounclausesinthereadingpassage.Discussandanalysethem.2.Writing:Rewritethepassageanduseasmanylanguagepointsandnewwordsaspossible.We have only one earth!We should take care of the earth!