冀教版初中八下Unit4LookintoScienceLesson25LetsDoanExperiment同步课件

New wordsvtheory n.理论vfill n.装满vjar n.广口瓶vupside n.上部vprove n.证明vobserve v.观察v THEORYvE=MCThink about itvDo you like to do experiments?What experiments have done?vWhat experiment is Brain gong to do?vWhats Dannys theory about what will happen?One experiment,two theoriesvB:a“theory”is an idea.A theory predicts what will happen.An experiment shows what happens.vB:Did you read about this experiment,Danny?I fill a jar with water.I cover the top with a piece of cardboard.Then,I turn the jar upside down.vJ:guess what will happen!vD:Im not sure.I think the floor will get wet.Maybe you should do this experiment outside,Brain!vB:No,we can do it inside.Im sure the floor wont get wet.vD:why not?The cardboard cant keep the water in the jar!vj:Lets do the；and see what happens.Brain has on theory,and Danny has another.We can prove whos right.vB:great!Well do the experiment and observe what will happen.Lets do itvIf brain does the experiment,will the floor get wet?Imagine what will happen.With a partner,make up a dialogue.vDo you like to do experiments?你喜欢做实验吗？vexperiment是一大个兼类词。

n实验，试验，vi.做实验vWe often do experiments in our science class.我们在自然学课上经常做实验vLook!Some boys are doing an experiment in the room.瞧！几个男孩儿正在房间里做实验vCan you experiment with the VCD player?你能试一下这台影碟机吗？vTom is experimenting upon a light.汤姆正在一个灯泡做实验vI fill the jar with water.我把广口瓶里装满水vfillwith用把（容器）装满v意同put sth.in sth.把装到（容器）里vJack filled his backpack with books.=Jack put the books into his backpack.杰克把书装进书包vFill in the blanks with the given words.用所给的单词填空vThe girl is filled with joy(fear).这个女孩内心充满了喜悦（恐惧）vI cover the top with a piece of cardboard.再用一张纸板盖在瓶口上。

v coverwith用把盖上vcover n.封面，盖子；覆盖vDavid broke the cover of his book.大卫把他的书皮撕破了vPlease cover the jar with a cover.请用盖子把瓶子盖上前为动词，后为名词）vThe ground is covered with snow.地面被冰雪覆盖了va piece of cardboard一张纸板vpiece用来表示不可数名词的量，块，件，条，片等va piece of music一段音乐va song一首歌 va piece of news一则消息 va piece of cloth一块布 va piece of wood一块木头v在表示事物的量时，piece可以根据实际情况用单数或复数，而名词则只能用单数vtwo pieces of chalk两枝粉笔 five pieces of paper5张纸vPlease pass me a piece of paper.请递给我一张纸vTom was hungry,he ate two more pieces of bread.v sure确定，确信，务必。

下面总结一下其具体用法v1)（美语）用于口语交际，当然，理应如此v-Are you going to?你去吗？v-Sure!当然去！v-Can you help me?你能帮我一下吗？v-Sure!当然可以！v2)be sure of sth.相信，确信某事vIm sure of what he said.我对他所说的确信无疑vAre you sure of it?你相信那件事吗？v3)be sure to do sth.一定，务必用于口语vBe sure to get to school on time.务必按时到校vBe sure not to touch that machine.务必不要动那台机器v4)make sure+从句，相信，确信vI make sure that he would go there.我确信他会去那儿的vThe cardboard cant keep the eater in the jar!纸板不能支持住瓶子里的水！vkeep保管，保存，使保持，保守，饲养等v这是一个意义颇为复杂的单词，请让它来“show”一下vHow long can I keep the book?这本书我可以保存多久？（keep保存，保管）vUncle Wang keeps a group of sheep.王伯伯养了一群羊。

饲养）vkeep sth.(sb.)+宾语+形容词+介词，让某人保持某种状态vPlease keep the room clean.请保持室内清洁vkeep on doing sth.继续或反复做某事vThe man was tired,but he kept on working.那个人累了，但他仍坚持工作vkeep sb.doing sth.让某人一直做某事vToms father kept him standing near the door.汤姆的父亲让他一直站在门边vBrain has one theory,and Danny has another.布莱恩有一个想法，丹尼有另一个voneanother(one)一个另一个v在分别表述两个以上的事物时，可以用这种表达式，此时的another表示“不特指的另一个”指另外的其中一个vThe cap is too big for me.Please show me another one.这顶帽子我戴太大请给我看看另一个vBob has an idea,Peter has another(one).鲍伯有一个主意，而彼得有另外一个v当表示两个或两类事物时，须用”one”,the other(one)或somethe others表达。

此时the other one表示特指，指剩余的另一个vWell do the experiment and observe what will happen.我们将做这个实验，观察一下将有什么现象发生vobserve vt.观察，遵守vPlease observe what I do carefully.请仔细观察我所做的一切vChildren are observing their teachers act.孩子们正在观察老师的动作vObservation,observe的名词形式“观察”“监视”vI will show you how to use it.Please observe.v(=I will show you how to use it.Please make observation.)我要向大家展示如何使用它请注意观察Finish off these exercises.1.用用把把装满装满 _ 2.用用把把盖住盖住 _3.我我(不不)确信确信 _4.正面朝上正面朝上 _5.把把翻转翻转_6.get wet _ 7.do an experiment _8.a piece of cardboard _9.inside（反义词）（反义词）_ 10.theory（复数）（复数）_11.careful(副词）副词）_ 11.science(形容词）形容词）_fillwithcover withI am(not)sureright side upturn upside down/turn over变湿变湿做一个实验做一个实验一块硬纸板一块硬纸板outsidetheoriescarefullyscientificWrite down the steps of doing the experiment1.Fill a jar with water.2.Cover the top with a piece of cardboard.3.Turn the jar upside down.What will happen?You may sayIm sureIm not sure The floor will get wet.I think The floor wont get wetMaybe The cardboard can keep the water in the jar.一、一、I fill a jar with water.我用水把瓶子装满。

我用水把瓶子装满fill with 用用装满装满 (主语是人主语是人)be full of /be filled with (主语是物或容器主语是物或容器)同义句转换同义句转换1.The rooms are full of the students now.The rooms _ _ _ the students now.2.My pocket is filled with the money.My pocket _ _ _ the money.选择5.Can you _ the box _ books?()A fill,with B full,with C filled,with D full,in6.The child _ all the bowls _ water.()A fill,with B fills,with C is full,with D is filled,with are filled with is full of AB学以致用学以致用二二.I turn the jar upside down.我把广口瓶倒置我把广口瓶倒置upside down 的意思是的意思是“向下翻转过向下翻转过来来”.You hold the book upside down.你把书拿倒了。

你把书拿倒了right side up 是是“正面朝上正面朝上”的意思的意思That picture is upside down.学以致用学以致用三、三、Im sure the floor wont get wet.我确信地板不我确信地板不会湿b e sure 表示肯定表示肯定,有把握有把握,而而be not sure 表示不确定表示不确定be sure/be not sure 后可接句子，后可接句子，还可接代词、名词、还可接代词、名词、动名词或不定式动名词或不定式常见用法：常见用法：be sure of sb/doing sth ,be sure to do sth完成下列各题完成下列各题1.我确信她会来我确信她会来that she will come here.2.他没有把握通过考试他没有把握通过考试_to past the exam.3.Im sure _ Jim plays basketball well.（）A of B to C that D withIm sureHes not sureCPRACTISEv.v.practise He _ the stockings _ christmas presents.（用（用装满）装满）Please pass me a bottle _ water.A.full with B.filled of C.filling with D.full of My mother is holding the book _ _.（倒着）（倒着）我弟弟用一块玻璃盖住了那个杯子。

我弟弟用一块玻璃盖住了那个杯子My brother _ the glass _ a piece of glass 我肯定他会来我肯定他会来 _ _ he will come.filledwithDupside downcoveredwith I am surevNew words:vscience scientific experiment fill prove method theory jar observe vPhrases:vbe filled with be full of cover with turn upside down vSentence Patterns:SUMMARY sb.be sure+that 从句从句sb.be not sure+疑问词引导的从句疑问词引导的从句First,_ a jar _ water.Then,_ the top _ a piece of cardboard.Finally,_ the jar _ _.withwithturnfillcoverupside downvRead the text again and again till you can describe the content of the text by yourself.vLearn to express sequence.vDont forget to preview the next lesson.HOMEWORKThank you for your presence and guidance!Good-Bye。