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,Lesson 30 Keep the Candle Burning!,Easter eggs,Easter basket,Easter Bunny,Correct the mistakes: They have hid many Easter eggs. I cant find my watch. Its going. Do you have lots of fun to hunt for Easter eggs? He feels enough happily to jump. 5. Danny is making an Easter egg hunt to his cousin.,hidden,_,_,gone,_,hunting,_,happy enough,_,for,Think about it! What do you think of science? Do you think science is interesting? Why or why not? Name one or two famous Chinese scientists. What do you know about them? Today we are going to look into science again and learn to do another experiment. What experiment will we do?,Read quickly and find the answer: What experiment will we learn to do?,Read carefully and answer the questions:,Whats the title(题目) of the reading? 2. What do you need to do the experiment?,a candle a candleholder a big glass jar a shallow dish with water matches,Keep the Candle Burning!,a candle,a candleholder,a big glass jar,a shallow dish with water,a match,matches,Read carefully and answer the questions:,3. How do we do the experiment?,1) Put the candle in the candleholder.,2) Put the candleholder in the dish.,3) Fill the dish half full of water.,4) Light the candle.,5) Let the candle burn for two or three minutes.,6) Carefully put the jar over the candle until the top of the jar rests on the dish.,7) Look at the water in the jar. What observation can you make?,4. What is happening?,use up oxygen one-fifth,Language notes:,2. To make a candle burn, you “light it”.,make/let/have sth./sb. do sth. “使某物/某人做某事”,burn burned/burnt burned/burnt,light lighted/lit lighted/lit,1. Fill the dish half full of water.,half adv.,The bottle is only half full.,3. Carefully put the jar over the candle until the top of the jar rests on the dish.,light adj. n. v.,make the candle burn = light the candle,Language notes:,Jim used up his money to buy the computer.,4. As the candle burns, it uses up oxygen in the air.,use sth. up “用尽(材料),设法利用(剩余的材料或时间)”,She used up the chicken bones(骨头) to make soup.,5. How far did the water rise?,eat up “吃光” drink up “喝光”,She was hungry and ate up the bread.,He drank up all the water.,水会上升多少?,6. There is about one-fifth oxygen in the air, so the water rises and fills about one-fifth of the jar.,one-fifth “五分之一”,Language notes:,分数由分子及分母两部分构成。用英语表达时,分子用基数词,分母用序数词。 若分子为1,则分母的序数词为单数形式,若分子大于1,则分母的序数词用复数形式。 one (a) half 或 one second ( one-second) = one (a)quarter 或 one-quarter,Cardinal Ordinal Fractional Number Number Number 基数词 序数词 分数,one two three four five six ten,first second third fourth fifth sixth tenth,one-third one-fifth one-sixth two-thirds three-sevenths four-ninths,Language notes:,二分之一 三分之一 四分之一 四分之三 五分之二 十分之九,a/one half (one second),one - third,three - fourths,three quarters,one quarter,two - fifths,nine - tenths,口 诀: 分子基,分母序。分子1 ,分母加 s,Correct the mistakes: There are lots of matchs in the small box. Can you let my uncle laughing? Youre very ill, so you must stop to smoke. Fill the dish half fill of water. There is about one five oxygen in the air. There are about two third students in the classroom. 7. I used out my money. Can you lend me some?,matches,_,_,laugh,_,smoking,one - fifth,_,full,_,_,two - thirds,_,up,用所给单词的正确形式填空: 1.You are very tired. Youd better stop _(have) a rest. 2. What do you use to make a candle _(burn)? 3. You should put the jar over the candle _(careful). 4. What _(observe) can you make? 5. Please cut the apple into _(half). 6. He _(light) a candle and the room was bright. 7. _(two), ask the students to guess what will happen. 8. He kept the candle _(burn) for two hours. 9. Its time _(play) basketball. 10. What about _(go) for a walk?,to have,burn,carefully,observation(s),halves,lighted/lit,Second,burning,to play,going,A task: Learn to speak English,1) Put the candle in the candleholder. 2) Put the candleholder in the dish. 3) Fill the dish half full of water. 4) Light the candle. 5) Let the candle burn for two or three minutes. 6) Carefully put the jar over the candle until the top of the jar rests on the dish. 7) Loo
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