Lesson26课件（冀教版九年级上）.ppt

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1、Doyouthinkscienceisinteresting?Canyounameoneortwofamousscientists?QianXuesen(钱学森):HeiscalledChina`skeystonespacescientist(中国航天之父).Newton(牛顿):Britishgreatphysicist,mathematician,astronomer.(英国伟大物理学家、数学家和天文学家)Rutherford（卢瑟福）Britishgreatphysicist英国伟大物理学家.Lesson26KeeptheCandleBu

2、rning!Previewdetection预习检测candleholder:match(pl)----__________light(过去式）___________(过去分词）____________________burn（过去式）___________(过去分词）________v.燃烧useupone--fifthshallow(反义词）________half(pl)______oxygenmatchesn.火柴;比赛lighted/litlighted/litv.点燃;使燃烧/照亮;使光明burned/t用完；用光；五分之一burne

3、d/tdeephalves烛台蜡台氧气acandleacandleholderabigglassjarashallowdishwithwateramatchmatchesListenandanswerthequestions:1.What’sthetitle(题目)ofthereading?2.Whatdoyouneedtodotheexperiment?●acandle●acandleholder●abigglassjar●ashallowdishwithwater●matchesKeeptheCandleBurning!3.Howdowedo

4、theexperiment?1)Putthecandleinthecandleholder.2)Putthecandleholderinthedish.3)Fillthedishhalffullofwater.4)Lightthecandle.5)Letthecandleburnfortwoorthreeminutes.6)Carefullyputthejaroverthecandleuntilthetopofthejarrestsonthedish.7)Lookatthewaterinthejar.Whatobservationcanyouma

5、ke?4.Whatishappening?useupoxygenone-fifthAtask:Fillinblanks1)Puttheinthe.2)Putthecandleholderinthedish.3)Fillthedish.4)thecandle.5)Letthecandlefortwoorthreeminutes.6)Carefullyputthejaroverthecandleuntilthetopofthejaronthedish.7)Lookatthewaterinthe.Whatobservationcanyoumake?ja

6、rcandleholdercandlehalffullofwaterLightburnrestsTeamwork:(小组合作)DotheexperimentandwriteaLabReport.（做实验，写一份实验报告）LabReport(实验报告)Class:_____Group:_____GroupLeader(组长):_____1.Whatdoyouneed?⑴___⑵___⑶___⑷___⑸___2.Steps(步骤)：Whatdoyoudo?⑴___⑵___⑶___⑷___⑸___⑹___⑺___3.Whatishappening?Di

7、scussingroup：Readthetextandfindsomeimportantphrasesandsentences.(读课文找出重点短语和句子)点拨ComepareandFindOne-fifthfour–fifthsone-thirdtwo-thirds分数表达法分子基分母序分子大于1分母加S1/54/51/32/3基数词序数词分子分母5/9Practise1/4one-fourth3/7three-sevenths.Thereisaboutone-fifthoxygenintheair,sothewaterrisesandfill

8、saboutone-fifthofthejar.aquarterfive-ninths一.自主探究，合作学习1.He_____thesp