高中英语：Unit4 Astronomy the science of the stars（新人教必修3）

WELCOMETOMYENGLISHWORLD!整理课件Step1Leadin

Lookattwopictures,trytogiveasmuchinformationaspossible.整理课件整理课件整理课件Unit4

Astronomy:the

scienceofthestars整理课件Step2Warmingup

Doyouknowhowmanyplanetscirclearoundthesuninoursolarsystem?Whatarethey?Canyoumatchthenameswiththeplanets?整理课件JupiterUranusNeptuneSaturnMercuryMarsEarthVenus水星

金星地球火星木星土星天王星海王星整理课件Step3AquizWhat’stheendoftheworld?It’s“D”.What’sthebeginningoftheworld?It’s“W”.整理课件

Step4Pre-reading

Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?

InChina,weallknowthatPanguseparatestheskyfromtheearth.

TheGoddessNvwamendedtheheavenandcreatedhumanbeings.

Inwesternculture,Godcreatedtheworldinsixdays.整理课件Panguseparatestheskyfromtheearth.整理课件Nvwamakeshumanbeings.整理课件Godcreatedman.上帝造人整理课件Whatisthepassageabout?

Step5ReadingHowlifebeganontheearth.整理课件

While-readingListentothetapeofthereadingpassageandmatchthemainideaforeachparagraph.整理课件MainideaofeachparagraphTheimportanceofwaterforlifeThedevelopmentofplantsandanimalsontheearthTheformationoftheearthd.Awidelyacceptedtheoryabouttheformationoftheuniverse

dcab

e.

ThearrivalofhumansandtheirimpactontheearthParagraph5:Paragraph1:Paragraph2:Paragraph3:Paragraph4:e整理课件While-readingWorkinpairs.Puttheorderofdevelopment

oflifeintoatimelineaccordingtothereadingpassage.

整理课件Puttheorderofdevelopmentoflifeintoatimeline.Insectsandamphibiansappeared.Theearthbecameasolidball.Reptilesappeared.Theearthwasacloudofdust.ShellfishandotherfishappearedDinosaursappeared.Smallplantsgrewonthewater.Plantsbegantogrowondryland.Waterappearedontheearth.Mammals(includinghumans)appeared.DBIGEHACFJ整理课件

While-readingThinkaboutwhatyouhavereadandmakechoices.整理课件Whywastheearthdifferentfromotherplanets?AItproducedalotofheat.B.Thewaterremained.CWaterdisappeared.D.Itwastheoldestplanet.Whywaslifeabletodevelopontheearthbutnotonotherplanets?ATheearthhadasolidshape.B.Theearthdidnothaveharmfulgasesinitsatmosphere.CThewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.ks5u精品课件整理课件Whydidtheplantsgrowbeforeanimalscame?AAnimalsneededplantstoprotectthemfromthesun.BPlantsprovidedoxygenforanimalstobreathe.CAnimalscouldhidefromhuntersinforest.DItwaseasierforplantstogrow.Whatproblemiscausedbyhumanbeings?ATheyexisteverywhereontheearth.BTheycauseglobalwarming.CTheyfindnewmethodsofgrowingcrops.DTheyenjoyhuntingandfishing.ks5u精品课件整理课件

Step6Lookingandthinking

Lookatthefollowingpicturesandtrytounderstandmoreofthereadingpassage.整理课件AcloudofdustAsolidglobeExplodeatmospherewater整理课件CellsseparatePlantsinthe waterEarlyshellfishandfishPlantson landoxygen整理课件InsectsandamphibiansReptilesDinosaursMammals整理课件Manhadevolvedfromapes.整理课件Thedevelopmentoflife整理课件Asastudent,whatlittlethingscanwedofortheearth?Step7Discussiontopreventtheearthfromgettinghotterandhottertoslowdowntheproblemgettingworse……整理课件Wehaveonlyoneearth!Weshouldtakecareoftheearth!ks5u精品课件整理课件Whetherlifewillcontinueontheearthdependsonhumanbeings.Onlyifwecarewillwehelp,onlyifwehelpshallallbesaved!整理课件Step8Homework

1.Readaloudthereadingpassageandunderlinetheusefulphrasesandsentencepatterns.2.FinishoffEx1andEx2onP.28.整理课件goodbye整理课件Step5SummingupHowlifebeganontheearth1.smallplantsinwater2.shellfish

andallsortsoffish3.greenplantsonland4.Insects(onland)5.

amphibians(onlandandinwater)

6.forests7.Reptiles(onland)8.Dinosaurs(onland)9.Mammals(onland)

10.smallcleveranimalswithhandsandfeet11.

humans

整理课件Whatsubjectsdoyoulearnatschool?ChineseEnglishmathematicsphysicshistorygeographyphysicsbiologychemistrybrainstorminggeophysicsbiochemistry整理课件Task3:Carefulreading1.Whatwasthereontheearthbeforelifecouldbegin?

Watervapour,carbondioxide,oxygen,nitrogenandothergases.2.Whydoscientiststhinktherehasneverbeenlifeonthemoon?Becausethereisnowateronthemoon.3.Whydidanimalsfirstappearintheseas?

Becausewaterallowedtheearthtodissolveharmfulgasesintotheoceansandseas.整理课件

4.Whydidgreenplantshelplifetodevelop?

Becausegreenplantscantakecarbondioxidefromtheatmosphereandfilltheairwithoxygen.5.Whyweremammalsdifferentfromotheranimals?

Theyweredifferentbecausetheyproducedtheiryoungfromwithintheirbodies.6.Howdidwatercomeintobeingontheearth?

Theexplosionoftheearthproducedwatervapor,whichturnedintowaterwhentheearthcooleddown.整理课件Water

Air

Lifeistheheadspringoflife.?HowLifeBeganontheEarth

Water整理课件________madeitpossibleforlifetobegintodevelop.Water整理课件Plantsencouragedthedevelopmentof_____________________________.earlyshellfi