Unit4Lesson30LeavingandarrivingPPT冀教版一起课件
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Lesson 30Keep the Candle Burning!金水初中陆颖Ⅰ. Learning aims:◆知识目标•Master the new words:match, light, burn, use up, shallow, candleholder, oxygen,one-fifth2) The important sentences:①Fill the dish half full of water.②As the candle burns, it uses up oxygen in the air.③There is about one-fifth oxygen in the air, so the water rises and fills about one-fifth of the jar.Ⅱ. 教学重点:1. Describe and explain the experiment inEnglish.2.分数的表达法Ⅲ.教学难点:Describe and explain the experiment in English .◆能力目标:can describe and explain the experiment in English ◆情感目标:Cultivate the spirit of loving science.预习早知道1.match (pl)----__________light (过去式)___________(过去分词)____________________burn (过去式)___________ (过去分词)________ v.燃烧use up one--fifthshallow(反义词)________half(pl)______matches n.火柴;比赛lighted/lit lighted/litv.点燃;使燃烧/照亮;使光明burn ed /t 用完;用光;五分之一burn ed /tdeep halvesLook and Learn1 .What are they ?They are ________They are used to _______something .Iwill use them ________a candle. I am _______ the candle with the match. My father often usesmatches _______his smoke. 2.This afternoon we ’ll have abasketball_______.matcheslight to lightlightingto light matchLook and Learn-----Because burning needs _______. when the candle stops buirning, it has ___ ____ all the oxygen in the jar. (______:They have _______ all the water. )What ’s this? It ’s a______.It ’sa _______candle . If I put the jar overthe burning candle, what will happen?----It will go out / stop _______why?candle burning burning oxygen usedupuse up used up一. 自主探究,合作学习1.He _____the spoon____the bowl.他把汤匙放到了碗里面。