Unit4　　全单元课件

《Unit4　　全单元课件》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Unit4Astronomy:thescienceofthestarsHowLifeBeganontheEarthPeriod1ScienceSubjectsPhysicsChemistryBiologyGeologyMathematicsMedicineBiochemistryGeophysicsAstronomyAstronomyisthescientificstudyoftheuniverseandtheheavenbodies(suchasthesun,themoon,andstars),gas,anddustwithinit.

2、astronomerTheBigBangTheSolarsystemeightplanetsmanycometsotherobjectsWaterAirLifeWateristheheadspringoflife.?AcloudofdustCombineintoasolidballExplode…withfire&rock(produceH2O,CO2,O2,N2,othergases)atmosphereCooldownwaterappeareddissolveharmfulgasesinto…LifebeganLifedevelop

3、edThedevelopmentoflifeAcloudofdust→asolidball→presenceofwater→onthewater→shellfish&otherfish→plantsbegintogrowondryland→insectsandamphibiansappear→retilesappear→dinosaursappear→mammalsappearThedevelopmentoflifesmallplantsgrowonthewaterappearshellfish&otherfishplantsbegin

4、togrowondrylandinsectsandamphibiansappearretilesappeardinosaursappearmammalsappearGoodmorning/afternoon,IamDr….I’mgreatlyhonoredtobeheretogiveyouaspeechaboutthedevelopmentoflife.…Whatproblemshavebeencausedbyhumanstotheearth?Howtoprotecttheearthandmakeitabetterplacetolive

5、on?DesignanactivityonEarthDayWhattheactivityisaboutWhytheactivityisdesignedWhenandwheretodotheactivityWhotakespartintheactivityWhattobedoneintheactivity…HomeworkSearchtheInternetfortheinformationofthedevelopmentoflife.2.Readandlearngoodwords,phrasesorstructuresfromReadin

6、g.Period2UsingLanguage&ReadingTaskthenaturalforcethatcausesanobjecttomovetowardthecentreoftheearth.GravityIsaacNewtonAlbertEinsteinStephenHawkingGravityIheardabouthowthreemenmademistakeswhentheytriedtodescribegravity.Iheardabouthowthreemenwantedtofindoutaboutthebeginning

7、oftheuniverse.Iheardabouthowtheideaofgravityhasdevelopedoveralongperiodoftime.Iheardaboutthreescientistsandtheirwork.MainideaNewtonEinsteinHawkingDatesIdeaOtherinfo.1642-17271879-19551942-EverythingisaffectedbyaforcecalledgravityGravityisconnectedtotimeandspace“Blackhole

8、s”“eat”objectsbutalso“spit”themout.Itwasonlyabouttheearth.Itwasabouttheuniverse.Itwasaboutthingsfoundin