广东省中山市高中英语 Unit 4 Astronomy the science of the stars（4）课件 新人教版必修3.ppt

usinglanguage unit4 book3 solarsystem gravity spacetravel 1 vocabularyreview请读出下列单词 并分音节 gravityuniverseastronomyastronomerphysicistspaceshiptheorysolarsystemglobeatmosphereweightfloatpull gra vi ty u ni verse as tro no my as tro no mer phy si cist space ship the o ry so larsys tem at mos phere 2 theplanetsinthesolarsystem 2 theplanetsinthesolarsystem 2 theplanetsinthesolarsystem 2 theplanetsinthesolarsystem alltheotherplanetsarecirclingthesun sotheremustbesomethingthatispullingthemtowardsit doyouknowwhatisit gravity 3 let slearnmoreaboutgravity g mggravity mass g 重力加速度 onearth g 9 8n kg 10n kgdavid sgravityonearth 60kg 10n kg 600n 3 let slearnmoreaboutgravity what sdavid sgravityonthemoon onthemoon g 1 6n kgdavid sgravityonthemoon 60kg 1 6n kg whyisdavid sgravityonthemoonsmallerthanthatonearth 96n 4 listening retelling aninterviewinterviewer michaeljones mj interviewee dr liyanping ly newwords object n 物体 gravity newton whyisdavid sgravityonthemoonsmallerthanthatonearth biggerobjects likethesun havestrongergravitythansmallerobjects likeourplanet biggermass strongergravity 4 listening retelling listenforthedifficultexpressions andtrytofillthefollowingblanks 1 somestudentsaskuswhythingsalwaysfallbacktoearthifyouthrowthem 2 ifyou retravelling deepspace 4 listening retelling nowworkwithyourpartnertoretelltheinterview oneofyouworkasmj theotherasly 4 listening retelling whathasthestrongestgravityintheuniverse blackholetolearnmoreaboutblackhole nowlistentothepart2oftheinterviewandtrytoretellit newwords mass n 质量edge n 边缘spit n 吐出 4 listening retelling 5 reading pleasereadthepassagewiththefollowingquestions howmanytimesdidthegravitychangeduringthetravel whendidthechangeshappen 5 reading thefirstchangehappenedwhentheyweretryingtoescapethepulloftheearth sgravity andthefirstchangewas thesecondchangehappenedwhentheywereinspace andtheauthorfeltasif thethirdchangewaswhentheywereonthemoon theauthor sweightwas thanthatonearth powerful thereisnogravityatall less 6 summarizing whatarethekeywordsofthispassage theauthorandliyanpingspacetravelthemoongravitybeginwith thispassagemainlytellsusthat 6 summarizing thispassagemainlytellsusthattheauthorandhisfriendliy