人教版必修三Unit 4 astronomy： the science of the stars Using language课件（27张）.ppt

unit4astronomy thescienceofthestars usinglanguage readingtask howlifebeganontheearth sciencesubjects physicschemistrybiologygeologymathematics medicinebiochemistrygeophysicsastronomy astronomyisthescientificstudyoftheuniverseandtheheavenbodies suchasthesun themoon andstars gas anddustwithinit astronomer thebigbang thesolarsystem eightplanetsmanycometsotherobjects waterairlife wateristheheadspringoflife acloudofdustcombineintoasolidballexplode withfire rock produceh2o co2 o2 n2 othergases atmosphere cooldown waterappeared dissolveharmfulgasesinto lifebegan lifedeveloped thedevelopmentoflife acloudofdust asolidball presenceofwater onthewater shellfish otherfish plantsbegintogrowondryland insectsandamphibiansappear retilesappear dinosaursappear mammalsappear thedevelopmentoflife insectsandamphibiansappear retilesappear dinosaursappear mammalsappear goodmorning afternoon iamdr i mgreatlyhonoredtobeheretogiveyouaspeechaboutthedevelopmentoflife whatproblemshavebeencausedbyhumanstotheearth howtoprotecttheearthandmakeitabetterplacetoliveon designanactivityonearthday whattheactivityisaboutwhytheactivityisdesignedwhenandwheretodotheactivitywhotakespartintheactivitywhattobedoneintheactivity homeworksearchtheinternetfortheinformationofthedevelopmentoflife 2 readandlearngoodwords phrasesorstructuresfromreading thenaturalforcethatcausesanobjecttomovetowardthecentreoftheearth gravity isaacnewton alberteinstein stephenhawking gravity iheardabouthowthreemenmademistakeswhentheytriedtodescribegravity iheardabouthowthreemenwantedtofindoutaboutthebeginningoftheuniverse iheardabouthowtheideaofgravityhasdevelopedoveralongperiodoftime iheardaboutthreescientistsandtheirwork mainidea 1642 1727 1879 1955 1942 everythingisaffectedbyaforcecalledgravity gravityisconnectedtotimeandspace blackholes eat objectsbutalso spit themout itwasonlyabouttheearth itwasabouttheuniverse itwasaboutthingsfoundintheuniversecalled blackholes avisittothemoon onthemoon thechangeofgravity inspace verystrong veryheavy disappeared floatedweightlessly verylight themasswillbeless leavetheearth lastmonthivisitedthemoonwithmyfriend beforeweleft iwastoldtheforceofg wouldchangethreetimesonourjourney thenwetookoff aswelefttheearth ibecameveryh graduallytheweightl wheniwasinspace itd wef weightlesslyinthecabinandic wheniwasonthemoon iwassurprisedtofindoutevenwalkingneedslotsofpracticen gravitychanged thereturningoftheearthwasveryf wewereamazedtowatchfireb ontheoutsideoftheship gravity heavy lessened disappeared floated cheeredup nowthat frightening breakout ablackhole aboutus abouttheblackhole aboutothers circleoflights largestars likeamouth inshockandamazement lightwentoutcomputersstoppedworking feelsickmymouthdryclosemyeyes spaceshipnotmove iwasbumpedandbangedabletolook spitobjectsout pullusintoitsmouth jumpedagain increaseitsspeedasfastaslight likeabird jumpandwentfastermywa