山東省茌平縣博平鎮(zhèn)中學八年級英語Lesson-30-Keep-the-Candle-Burning

Lesson30:

KeeptheCandleBurning!

Lesson30:

KeeptheCandleB1ThinkaboutitDoyouthinkscienceisinteresting?Whyorwhynot?NameoneortwofamousChinesescientist.Whatdoyouknowaboutthem?ThinkaboutitDoyouthinksci2山東省茌平縣博平鎮(zhèn)中學八年級英語《Lesson-30-Keep-the-Candle-Burning3山東省茌平縣博平鎮(zhèn)中學八年級英語《Lesson-30-Keep-the-Candle-Burning4山東省茌平縣博平鎮(zhèn)中學八年級英語《Lesson-30-Keep-the-Candle-Burning5山東省茌平縣博平鎮(zhèn)中學八年級英語《Lesson-30-Keep-the-Candle-Burning6楊振寧楊振寧7Newwordsshallowadj.淺的matchn.火柴burnv.燃燒lightv.點燃useup用完candleholdern.蠟燭座Oxygenn.氧氣Newwordsshallowadj.淺的8matchmatch9burnburn10candleholdern.candleholdern.11觀看實驗視頻Scienceissointeresting!I’msureyou’lllikethisexperiment!觀看實驗視頻Scienceissointerestin12acandlematchesacandleholderadishajaracandlematchesacandleholdera13Whatdoyouneed?AcandleAcandleholderAbigglassjarAshallowdishwithwatermatchesWhatdoyouneed?Acandle14Whatdoyoudo?

1.Putthecandleinthecandleholder.2.Putthecandleholderinhedish.3.Fillthedishhalffullofwater.4.lightthecandle.5.letthecandleburnfortwoorthreeminutes.6.carefulputthejaroverthecandleuntilthetopofthejarrestsonthedish.7.lookatthewaterinthejar.Whatobservationcanyoumake?Whatdoyoudo?

1.Putthecan15Putthecandleinthecandleholder.Putthecandleinthecandleho16Putthecandleholderinthedish.Putthecandleholderinthedi17Fillthedishhalffullofwater.Fillthedishhalffullofwat18Lightthecandle.Lightthecandle.19Nowthecandleisburning.Letthecandleburnfortwoorthreeminutes.Nowthecandleisburning.Let20Carefullyputthejaroverthecandleuntilthetopofthejarrestsonthedish.Carefullyputthejaroverthe21Thewaterinthejarrises.Whatwillhappen?Thewaterinthejarrises.Wha22Whatishappening?Asthecandleburns,itusesupoxygenintheair.Whenthecandlestopsburning,ithasusedupalltheoxygeninthejar.Thewaterinsidethejarthenrises.Howfardidthewaterrise?Thereisaboutone-fifthoxygenintheair,sothewaterrisesandfillsaboutone-fifthofthejar.Whatishappening?Asthecandl23Thinkaboutit!Whycanthewatergoup?Asthecandleburns,itusesupoxygenintheair.Whenthecandlestopsburning,ithasusedupalltheoxygenintheairinthejar.Thewaterthenrises.Thinkaboutit!Whycanthewat24AreportWhatdoyouneed?Weneed_______________.Whatdoyoudo?First,_________________.Second,_______________.Then,_________________....Whatishappening?_______________________.AreportWhatdoyouneed?Wene25First,______thecandle____thecandleholder.____,putitinthe_____.Third,____thedish___fullofwater.Fourth,_____thecandle.Then,letthecandle______for2or3minutes.Finally,putthejar_____thecandle____thetopofthejarrestsonthedish.whatcanyoufind?Thewaterinthejar_____becausethecandlehas____upthe_____intheairinthejar.Fillinthe