Lesson26课件（冀教版九年级上）

1、Do you think science is interesting?Can you name one or two famous scientists?Qian Xuesen(钱学森):He is called Chinas keystone space scientist(中国航天之父 ).Newton(牛顿) :British great physicist, mathematician, astronomer.(英国伟大物理学家、数学家和天文学家)Rutherford（卢瑟福） British great physicist英国伟大物理学家. Lesson 26Preview det

2、ection预习检测预习检测candleholder:match (pl)-_light (过去式）过去式）_(过去分词）过去分词）_burn（过去式）（过去式）_ (过去分词）过去分词）_ v. 燃烧燃烧use upone-fifthshallow(反义词）反义词）_half(pl)_ oxygenmatchesn. 火柴火柴;比赛比赛 lighted/litlighted/lit v. 点燃点燃;使燃烧使燃烧/照亮照亮;使光明使光明burned/t用完；用光；五分之一burned/tdeephalves烛台烛台 蜡台蜡台氧气氧气a candle a candleholder a big g

3、lass jar a shallow dish with water a match matches Listen and answer the questions: 1.Whats the title(题目题目) 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 matchesKeep the Candle Burning!3. How do we do the experiment?1) Put

4、 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 observ

5、ation can you make?4. What is happening?use up oxygen one-fifthA task: Fill in blanks 1) Put the in the . 2) Put the candleholder in the dish.3) Fill the dish . 4) the candle.5) Let the candle for two or three minutes.6) Carefully put the jar over the candle until the top of the jar on the dish.7) L

6、ook at the water in the . What observation can you make?jarcandleholdercandlehalf full of waterLightburnrestsTeamwork:(小组合作)Do the experiment and write a Lab Report.（做实验，写一份实验报告）Lab Report(Lab Report(实验报告实验报告) )Class:_ Group:_Class:_ Group:_Group Leader(Group Leader(组长组长):_):_1.What do you need?1.Wh

7、at do you need?_2.Steps(2.Steps(步骤步骤) )：What do you do?What do you do?_3.What is happening?3.What is happening?Discuss in groupDiscuss in group：Read the text and find Read the text and find some important phrases some important phrases and sentences.(and sentences.(读课文找出读课文找出重点短语和句子重点短语和句子) )点拨点拨 Co

8、mepare and Find One - fifth four fifthsone - third two - thirds分数表达法分数表达法分子基分子基分母序分母序分子大于分子大于 1分母加分母加 S1/5 4/5 1/3 2/3 基数词基数词 序数词序数词分子分子分母分母 5/9Practise1/4one-fourth3/7three-sevenths. There is about one-fifth oxygen in the air, so the water rises and fills about one-fifth of the jar.a quarterfive-ni

9、nths一一. 自主探究，合作学习自主探究，合作学习1.He _the spoon_the bowl.他把汤匙放到了碗里面。2.Lily _the bottle_water. Lily 把瓶子装满了水。3.The room _ smoking. 屋子里充满了烟。4.Please put the jar _the candle.请把罐子放到蜡烛的 上面。5.My mother_her money to buy clothing yesterday.我妈妈昨天买衣服花光(用光）了她身上所有的钱。6.In our class,_ students are boys,_ students are gi

10、rls. 在我们班，三分之二的学生是男生，三分之一的学生是女生。7.His mother kept him_books this morning.今天早上他的妈妈让他一直读书。putinfilledwithis full of/is filled withoverused uptwo-thirdsone-thirdreadingLanguage notes: 二分之一二分之一 三分之一三分之一 四分之一四分之一 四分之三四分之三 五分之二五分之二 十分之九十分之九 a/one half (one second)one - third three - fourthsthree quarters

11、one quartertwo - fifthsnine - tenths口口 诀：诀：分子基，分母序。分子分子基，分母序。分子1 ，分母加，分母加 ssummaryThe new words: match, light, burn, shallow, candleholder, oxygen, The phrases and expressions:use up, one-fifth, keep sb/sth doing, Stop doing/to do sth, put.in/over分数的表达：分子基，分母序，分子大于分子基，分母序，分子大于 1，分母加，分母加 S sentences

12、Fill the dish half full of water. As the candle burns, it uses up oxygen in the air. There is about one-fifth oxygen in the air, so the water rises and fills about one-fifth of the jar.How do “ keep the candle burning”单项选择1.The bottle is only_full. A.half B.a half C. halfs D.halves2.She _the chicken

13、 bones to make soup.A.Used for B. used to C.used up D.used with3._of the students in our school_from countryside.(乡村）A.Four-fifths,comes B.Fourth-five,come C.Four-fifth,come D.Four-fifths,come4._of water_from the sea here . A. Three-fourths, are B.Three-four，is C.Three-quarters，is D. Three-fourth, i

14、s5.The river is _here; we can walk across. A. deep B. fast C. shallow6.Yellow is a _colour, but black is dark. A. orange B. light C. heavyACDCCB用所给单词的正确形式填空：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