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

WELCOMETOMYENGLISHWORLD!整理課件Step1Leadin

Lookattwopictures,trytogiveasmuchinformationaspossible.整理課件整理課件整理課件Unit4

Astronomy:the

scienceofthestars整理課件Step2Warmingup

Doyouknowhowmanyplanetscirclearoundthesuninoursolarsystem?Whatarethey?Canyoumatchthenameswiththeplanets?整理課件JupiterUranusNeptuneSaturnMercuryMarsEarthVenus水星

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

Step4Pre-reading

Eachreligionandculturehasitsownideasabouthowlifebeganonearth.Whatdoyouknow?

InChina,weallknowthatPanguseparatestheskyfromtheearth.

TheGoddessNvwamendedtheheavenandcreatedhumanbeings.

Inwesternculture,Godcreatedtheworldinsixdays.整理課件Panguseparatestheskyfromtheearth.整理課件Nvwamakeshumanbeings.整理課件Godcreatedman.上帝造人整理課件Whatisthepassageabout?

Step5ReadingHowlifebeganontheearth.整理課件

While-readingListentothetapeofthereadingpassageandmatchthemainideaforeachparagraph.整理課件MainideaofeachparagraphTheimportanceofwaterforlifeThedevelopmentofplantsandanimalsontheearthTheformationoftheearthd.Awidelyacceptedtheoryabouttheformationoftheuniverse

dcab

e.

ThearrivalofhumansandtheirimpactontheearthParagraph5:Paragraph1:Paragraph2:Paragraph3:Paragraph4:e整理課件While-readingWorkinpairs.Puttheorderofdevelopment

oflifeintoatimelineaccordingtothereadingpassage.

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

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

Step6Lookingandthinking

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

1.Readaloudthereadingpassageandunderlinetheusefulphrasesandsentencepatterns.2.FinishoffEx1andEx2onP.28.整理課件goodbye整理課件Step5SummingupHowlifebeganontheearth1.smallplantsinwater2.shellfish

andallsortsoffish3.greenplantsonland4.Insects(onland)5.

amphibians(onlandandinwater)

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

10.smallcleveranimalswithhandsandfeet11.

humans

整理課件Whatsubjectsdoyoulearnatschool?ChineseEnglishmathematicsphysicshistorygeographyphysicsbiologychemistrybrainstorminggeophysicsbiochemistry整理課件Task3:Carefulreading1.Whatwasthereontheearthbeforelifecouldbegin?

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

Becausewaterallowedtheearthtodissolveharmfulgasesintotheoceansandseas.整理課件

4.Whydidgreenplantshelplifetodevelop?

Becausegreenplantscantakecarbondioxidefromtheatmosphereandfilltheairwithoxygen.5.Whyweremammalsdifferentfromotheranimals?

Theyweredifferentbecausetheyproducedtheiryoungfromwithintheirbodies.6.Howdidwatercomeintobeingontheearth?

Theexplosionoftheearthproducedwatervapor,whichturnedintowaterwhentheearthcooleddown.整理課件Water

Air

Lifeistheheadspringoflife.?HowLifeBeganontheEarth

Water整理課件________madeitpossibleforlifetobegintodevelop.Water整理課件Plantsencouragedthedevelopmentof_____________________________.earlyshellfi