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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,*,*,Using Language,Unit 4,Book3,Solar System,gravity,space travel,1,1.Vocabulary Review请读出下列单词,并分音节,gravityuniverse,astronomyastronomer,physicistspaceship,theorysolar system,globeatmosphere,weightfloat,pull,gra/vi/ty,u/ni/verse,as/tro/no/my,as/tro/no/mer,phy/si/cist,space/ship,the/o/ry,so/lar sys/tem,at/mos/phere,2,2.The planets in the Solar System,3,2.The planets in the Solar System,4,2.The planets in the Solar System,5,2.The planets in the Solar System,All the other planets are circling the Sun,so there must be something that is pulling them towards it.Do you know what is it?,GRAVITY,6,3.Lets learn more about gravity,G=mg,Gravity=Mass g(重力加速度),on Earth:g=9.8N/kg 10N/kg,Davids gravity on Earth=?,60kg 10N/kg=,600N,7,3.Lets learn more about gravity,Whats Davids gravity on the Moon?,on the Moon:g=1.6 N/kg,Davids gravity on the Moon=?,60kg 1.6N/kg=,Why is Davids gravity on the Moon smaller than that on Earth?,96N,8,4.Listening&Retelling,An Interview,Interviewer:Michael Jones(MJ),Interviewee:Dr.Li Yanping(LY),New Words:object(n.)物体,Gravity,Newton,9,Why is Davids gravity on the Moon smaller than that on Earth?,Bigger objects(like the sun)have stronger gravity than smaller objects(like our planet).,Bigger mass,stronger gravity.,4.Listening&Retelling,10,Listen for the difficult expressions,and try to fill the following blanks,(1)Some students ask us why things always fall back to earth if you throw them,_,_,_,_,.,(2)If youre travelling,_,deep space,4.Listening&Retelling,11,Now work with your partner to retell the interview.,One of you work as MJ,the other as LY.,4.Listening&Retelling,12,What has the strongest gravity in the universe?,BLACK HOLE,To learn more about black hole,now listen to the Part 2 of the interview and try to retell it.,New words:mass(n.)质量edge(n.)边缘,spit(n.)吐出,4.Listening&Retelling,13,5.Reading,Please read the passage with the following questions:,How many times did the gravity change during the travel?,When did the changes happen?,14,5.Reading,The first change happened when they were trying to escape the pull of the earths gravity,and the first change was _.,The second change happened when they were in space,and the author felt as if _.,The third change was when they were on the moon.The authors weight was _ than that on earth.,powerful,There is no gravity at all,less,15,6.Summarizing,What are the key words of this passage?,the author and Li Yanping,space travel,the moon,gravity,begin with“This passage mainly tells us that.”,16,6.Summarizing,This passage mainly tells us that the author and his friend Li Yanping had a space travel to the moon.And during the travel the gravity changed three times,which helped the author learn about gravity.,17,
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