高中英语 Module 5 Period Ⅰ Previewing同步备课课件 外研版必修1.ppt

美文阅读 howtocreatearocketballoontocreatearocketballoon you llneedthefollowingitems aballoon anysize apieceofstring 10to25feet astraightdrinkingstraw 吸管 tape first youhavetocreatea track fortherocketballoontorunon youbeginbytyingoneendofthestringtoatree post chair oranyotherstrongsupport thenslide 使滑动 thefreeendofthestringthroughthedrinkingstraw tietheotherendofthestringtoanothersupport generallyatthesameheight makesurethestringistaut 绷紧的 whentieddown movethestrawtooneendofthestring filltheballoonwithair holdthenecktightlytokeepitfull usingtwopiecesoftapetoattachtheballoontothestraw themouthoftheballoonshouldpointtowardthenearestsupport thenreleasetheballoonandwatchitgo whenthemouthoftheballoonisheldclosed theairintheballoonhasnowheretogo soitpushesbacktokeeptheballoon sshape however sincethemouthisopenwhenyoureleaseit theairhassomewheretogo theairpushesoutthemouthoftheballoon sincetheairisnowmoving therocketballoonalsomoves thisfollowsnewton sthirdlawofmotion foreveryactionthere sanequalandoppositereaction thereisfriction 摩擦 betweenthestringandthestraw butthestrawismadeofmaterialthat ssmoothandtheweightoftheballoonandstrawislight sotheoverallfrictionalforceisverysmall itisthesamewhenrocketswork theyburnfueltopushmatteroutthebackforcefully therocketmovesinresponsetothis sincearocketweighsmuchmorethanaballoon ofcourse ittakesmorefueltogetitmoving 诱思导学 1 doyoulikedoingscientificexperiments whatarethestagesofascientificexperiment 答案 yes ido thestagesareasfollows aim method result conclusion 2 whatwillhappenwhentheairintheballoonisreceased 答案 whentheballoon smouthisopen theairwillpushtheballoontomove 教学目标本课时主要是通过学生对学案所给出的内容的学习 了解本课文中所出现的词汇 初步了解课文以及相关的背景知识 对下一堂课对课文的全面理解起到一个铺垫作用 教师用书独具演示 教学地位该部分列举了与科技 实验有关的词汇 并设计了三个练习活动 通过这三个活动 学生可以初步熟悉这些词的意义 为以后的各项学习活动做好准备 新课导入建议 1 askthestudentstoreadthroughthequestionsquickly howdoeswaterexist ifyouheatametal whatchangewillhappen whatissteelmadefrom whatistheearth ssurfacemainlycoveredby howfaristhesunfromtheearth howoldistheearth whichislarger theearthorthemoon 演示结束 答案 1 substances2 inorder3 atthetop4 atthebottom5 experiment6 dry7 iron8 air free9 tube10 ordinary 语篇理解阅读p44 45的readingandvocabulary部分 从每题所给的3个选项中选出最佳答案passagea1 thispassagemainlytalksabout a thekindofmetalb whatkindofmetalreactsmostc thedifferentreactionsofmetals 2 whichofthefollowingmetalsreactsthemostwithwater a copper b iron c aluminium 3 whenheatedinoxygen willreactpartially a zincb copperc potassium4 accordingtothepassage itcanbeinferredthatwillhavelessuseinmakingkitchentools a aluminiumb ironc steel 答案 1 4ccba passageb5 theexperimentshowsus a howironrustswithairb ironisquiteeasytorustc howironreactswithairandwithwater6 air freewater means a airwithalotofwaterb airwithoutwaterc waterwithoutair 7 ifsomecleanironnailsareputinadampplaceforaweek thenailswill a rustb notrustc formanoxide 答案 5 7cca 课文缩写用所给单词或短语的正确形式完成课文缩写atthetop reactwith add to atthebottom substance reaction rust keep outof put inorder boilfrompassageaweknowthe1 ofmetalswithsome2 suchaswaterandoxygencanbe3 itcanbeseenthemetalsreactmost4 andthemetalsreactleast5 whenyouheatcalciuminoxygen you llfinditburnstoformanoxide anditcaneasilybeseencopperdoesn t6 water inthefirstpartoftheexperimentinpassageb theairisdry notwet itshowsthatirondoesn t7 whentheairisdry inthesecondpartoftheexperiment youmust8 thewatertomakesurethereisnoairinit you9 someoiltothewaterbecausethis10 airoutofit itshowsthatirondoesn trustinwaterthathasnoairinit 答案 1 reaction2 substances3 putinorder4 atthetop5 atthebottom6 reactwith7 rust8 boil9 add10 keeps 词义搭配1 expanda aparticulartimeorstatethatsomethingreachesasitgrowsordevelops2 contractb somethingyouhopetoachievebydoingsomething3 substancec thetools machines clothesetc thatyouneedtodoaparticularjoboractivity 4 mixtured causesth to becomegreaterinsize numberorimportance5 stagee somethingyoudecideafterconsideringalltheinformationyouhave6 conclusionf average common orusual notdifferentorspecial7 aimg aparticulartypeofsolid liquid orgas8 equipmenth ifachemicalsubstancereacts itchangeswhenitismixedwithanotherchemicalsubstance 9 reacti aliquidorothersubstancemadebymixingseveralsubstancestogether especiallyincooking10 ordinaryj makeorbecomesmallerorshorter 答案 1 d2 j3 g4 i5 a6 e7 b8 c9 h10 f 短语填空add to put inorder keep outof reactwith thinkof atthebottom1 youshouldthedogourbaby sroom 2 iwillmychildhoodeverytimeiseethepicture 3 ithasbecomeherhabittoeverythinginherroom 4 pleasesomesugarmycoffee 5 ironwaterandairtoproducerust 答案 1 keep outof2 thinkof3 put in