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Lesson30KeeptheCandleBurning
ListenandUnderstandLastweekwedidascientificexperiment.Itprovedthatourguessingorthoeryisrightorwrong.Ittellsusthattheairhasenoughforcetoholdthewater.Doyouthinkscienceisinteresting?Why?Becauseitmakesussurprised.Itchangesourwrongideas.Scienceissointerestingandweird!LoveScienceandScientists
Welovescience.Butweloveourscientistsbetter.Theyworkhardandhard.Theydosomanyscientificexperiments.Theyopenalotofsecretsoftheworld.Howgreatthescientistsare!CanyounameoneortwofamousChinesescientists?Todaywe’lldoanotherscientificexperiment.I’msureyou’lllikeit.Howshallwedoit?Whatwillittellus?NowLet’sstartLesson3o:KeeptheCandleBurning
LookandLearn1.MatchesTheyareusedtolightsomething.Iwillusethemtolightacandle.Iamlightingthecandlewiththematch.Myfatheroftenusesmatchestolighthissmoke.Thisafternoonwe’llhaveabasketballmatch.
LookandLearn-----Becauseburningneedsoxygen.whenthecandlestopsbuirning,ithasusedupalltheoxygeninthejar.(useup:Theyhaveusedupallthewater.)2.AcandleIt’saburningcandle.IfIputthejarovertheburningcandle,whatwillhappen?----Itwillgoout/stopburning.why?
LookandLearn4.acandleholderItisusedtoputacandle.Itlookslikealilltlecup.3.AdishIt’sashallowdishThedishisshallow.Theriverisshallow,youcanwalkpast.
ajarIt’sabigglassjar.Look,there’ssomewaterinthejar.Howmuchwater?Lookandlearn------It’saboutone-fifthofthejar.What’sthefour-fifthsofthejar?Thetwo–thirdsofthestudentslikeEnglish
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