【公开课】必修三Unit4 Reading Astronomy the science of stars

Module3

Unit4Astronomy:thescienceofthestarsReading&SpeakingAstronomy:

thescienceofthestarsWarmingup

Howmuchdoyouknowaboutastronomy&astronomers?1.Howlongdoestherotation(自转)oftheearthtake?

A.12hoursB.24hours

C.amonth

D.365daysAQuizGame

2.Howoldistheearth?

A.About3.5billionyearsB.About4.5billionyearsC.About5.5billionyearsD.About6.5billionyears

3.______oftheearthsurfaceiscoveredbywater.A.20%B.30%C.50%D.70%4.OnwhatdayistheEarthDaycelebrated?

A.April22B.May4C.August21D.November11IsaacNewton:

7.________makeseverythingfallbacktotheearth.Universalgravity万有引力GravityPre-reading

Eachreligionandculturehasitsownideasabouthowlifebeganontheearth.Whatdoyouknow?Thescientificidea?_______separated

theskyfromtheearth

_____createdhumans____createdtheworldPanguNvwaGodHowlifebeganontheearthReading

3.Watchingavideo1.Passagestructure&MainideasMainbodyPara1:Para2:Para3:Para4:Para5:Awidelyaccepted________abouttheformationoftheuniverse.Theformationoftheearth.Theimportanceof______forlife.Thedevelopmentof______and________ontheearth.Thearrivalof_________andtheir_________ontheearth.Skimthepassageandanalyseitsstructure:Theformationofearth,atmosphere,waterThedevelopment

oflifetheorywaterplantsanimalshumansimpactA

cloud

of

energetic

dust

AviolentsolidglobeAtmosphere

water4132settleintoExplodewithfireandrockCooldownPara

1-3“BigBang”2.Mind-map

1.

Smallplantsinwater2._______andallsortsoffish3.Green____onland4.

____(onland)5.

Amphibians(onlandandin

____)6.

Plantsgrewinto

_______.8.

__________

(onland)9.

__________(onland)Para4-5:the

developmentoflife7.

_____(onland)10.____________(smallcleveranimalsonland)ShellfishInsectswaterplantsforestsReptilesDinosaursMammalsHumanbeings2.Mind-maplowManhadevolvedfromapes.

达尔文(进化论)advancedhumanbeings4.Groupcompetition(LuckyClick幸运点击)

123456781.Whyisitwronginfilmsandstoriestoshowdinosaursandpeopletogether?

（3’）

Becausedinosaursdiedoutlongbeforehumanbeingsdevelopedontheearth.2.Whywaslifeabletodevelopontheearthbutnotonotherplanets?（2’）A.Theearthhadasolidshape.B.Theearthdidnothaveharmfulgasesinitsatmosphere.C.Thewaterstayedontheearthbutnotonotherplanets.D.Theearthwasnottoohotandnottoocold.Waterallowedtheearthtodissolveharmfulgasesandacidsintotheoceans.Thisproduced

achainreaction,

whichmadeitpossibleforlifetodevelop.3.Whyisthepresenceofwaterfundamentaltothedevelopmentoflife?（3’）

4.Whywasitnecessaryforplantstogrowbeforeanimals?（2’）A.Animalsneededplantstoprotectthemfromthesun.B.Plantsprovidedoxygenforanimalstobreathe.C.Animalscouldhidefromhuntersintheforest.D.Itwaseasierforplantstogrow.Mammalslikemonkeysgavebirthtoyoungbabyanimalsandproducedmilktofeedthem.5.Whyweremammalsdifferentfromalllifeformsinthepast?（3’）Theyareputtingtoomuchcarbondioxide

intotheatmosphere,whichpreventsheatfromescapingtheearthintospace.6.Whatproblemiscausedbyhumans?GlobalWarming（Ifyoucan,

youcansteal2pointsfromanyothergroup.）7.Whydoscientiststhinktherehasneverbeenlifeonthemoon?（2’）Becausethereisno_______onthemoon.water（Ifyoucan’t,youwilllosehalfofyourscore.）a.insectsb.plantsc.reptilesd.fishe.amphibiansf.mammals8.Lookatthepicturesandtellthegroups.（4’）b-d-a-e-c-f

GlobalWarmingPost-reading

1.WhydidSusie’sicecreamgoaway?

______________2.Mr.Sunbeamcomesallthewayfromthesuntovisitustobrightenour_____,andwhenheisaway,itis________ontheearth.3.WhatgasesmakeMr.Sunbeamtrappedaroundtheearth?__________gases4.What’sagoodwaytodealwiththeproblem?Drop_____tubesintotheocean.5.Let’ssolvetheproblemonceandforall!GlobalWarmingdaynightGreenhouseice彻底地，一劳永逸地Inourdailylife,whatcanwedotofightagainstglobalwarmingandmakeourearthabetterplacetoliveon?TalkingbarHowlifewillcontinueontheearth?Howlifebeganontheearth?Let’ssolvetheproblemonceandforall!Wearerunningoutoftime.Actnowbeforeit’stoolate.

*Try