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1、Unit 5 Look into ScienceLesson25: Lets Do an Experiment!【学习目标】知识目标：science,experiment,fill,prove,scientific,method;doanexperiment, fillwith, cover.with, turn upside down, be (not) sure;1. Im sure the floor wont get wet.2. Im not sure. I think the floor will get wet.3. Maybe you should do this experi
2、ment outside.能力目标：了解詹妮、丹尼和布莱恩的实验并说明理由。情感目标：引起学生对实验的兴趣，热爱学习。【重点及难点】理解实验原理，用英语介绍实验操作步骤。【导学过程】一、自主预习 【预习指导】1.自学教材第25课单词与词组，你可以听录音跟读，根据音标读，或者请教别人读。做到发音标准，弄清词性和汉语意思。读得同时圈出新单词，生单词。2.自学教材第66页内容，仔细读课文至少三遍，弄清课文大意。用横线划出文中的重要句子。【自主学习】. 自读课文，把你圈出的单词写下来。_. 翻译下列短语。1. 给广口瓶装入水_ 2.用硬纸板盖住瓶口_3. 把广口瓶翻转过来_ 4.做一个实验_5. 科学
3、的方法_.在自学过程中，你还有哪些疑惑用横线在文中画出来，并把它写下来，和你的同伴交流。二、合作探究Task 1. 读课文，想一想下面的两个问题1. WhatexperimentisBriangoingtodo?_2. WhatsDannystheoryaboutwhatwillhappen?_Task 2. 再读课文，给下列句子排序。a.Putyourhandonthecardboard.Andturnoverthejarcarefully.b.Moveyourhandawayquickly.c.Fillthejarwithwater.d.Coverthetopwithapieceofcar
4、dboard.e.Thecardboardwillholdthewaterup._Task 3. 小组讨论导学案上的Language Notes；完成 Lets Do It 1、2。Task 4. 分组做实验，并用英语描述实验过程及结果。三、交流展示Language Points:1. I cover the top with a piece of cardboard and hold it there. 我用一块纸板将它的顶部盖上并把它按在那里。 coverwith 意为“用覆盖”，类似句式be covered with 表示“被覆盖”，这是一个系表结构。 My mother covered
5、 the table with cloth. 我妈妈用布把桌子盖住了。 The bed is covered with paper. 床上盖满了纸。2. Then I turn the jar upside down and take my hand off the cardboard. 然后我将广口瓶倒置并将我的手从纸板上拿开。 turn upside down 意为“把翻转/倒过来”，相当于turn over. upside down意为“正面朝下”；“right side up”意为“正面朝上”。Turn your watch upside down and then put it on
6、 the table.把你的手表翻过来，然后把它放在桌子上。You hold the book upside down. 你把书拿倒了。 take off 意为“使离开/脱离；把从拿开”。 Please take your hand off my cup. 请把你的手从我的杯子上拿开。 【拓展】take off 意为“摘掉；（飞机）起飞；脱掉”Bill took off his glasses. 比尔摘掉了他的眼镜。When will the plane take off? 飞机将在什么时候起飞？3. I am so sure of my theory that Brian can do th
7、e experiment over your head and I know you wont get wet. 我对我的理论很有把握，布莱恩可以在你的头上做实验， 并且你不会湿的。 be sure表示肯定,有把握, 而be not sure表示不确定；be sure/be not sure后可接句子，也可接代词、名词、动名词或不定式。be sure of 意为“对有把握”； 常见用法：be sure of sb./doing sth. Are you sure of this matter? 你对这件事情有把握吗？be sure to do sth. “确定做某事”I am sure to
8、go back home tomorrow. 我确定明天回家。be sure + that 从句 He isnt sure that he can pass the exam. 他不确定他能通过考试。 sothat 如此以至于He is so sleepy that he can fall asleep everywhere. 他是如此疲倦以至于在哪里都能睡着。4. It is strong enough to hold the water. 它力量很大足以把水托住。 enough to do 意为“足以做某事”，这里的enough起副词作用，用在形容词或副词后作状语。 Allan is ol
9、d enough to go to school. 艾伦到上学的年龄了。四、当堂检测I判断下列句子的正误。1.Putapieceofcardboardoverthejar.( )2.Turnoverthejarslowly.( )3.Moveyourhandsawayquickly.( )4.Whenthejarisupsidedown,thewaterspillsout.( )5.Thereismoreairoutsidethejarthaninsidethejar.( )完成句子。1.我们把瓶子装满了水。We_thebottle_water.2.我用一张纸把食物盖上了。I_thefood_
10、apieceofpaper.3.我认为地板会湿。Ithinkthefloor_quickly.4.我确信汤姆不会来了。I_Tomwontcome.5.我们要做这个实验，来观察一下会发生什么事情。Wewill_theexperimentand_whatwillhappen.6.Danny,please_thebottle_ (把瓶子倒置).7.让我们一起做这个实验吧！_the_together!8.Ineedfive_.(5张纸)9.Wemustlearneverythingwith_. (科学方法)10._(把翻过来) thecard_andyoucanreadthewordsonit.单项选
11、择。( )1.Heissure_hisanswer.A.of B.for C.in D.with( )2.Hefilledthebottle_waterthedaybeforeyesterday. A.with B.of C.by D.on( )3.Thecardboardcan_thewaterinthejar.A.close B.keep C.hold D.make( )4.There_afootballgamebetweenItalyandGermanytomorrowmorning. A.has B.isgoingtobe C.willhave D.hasbeen五、作业布置1. Fi
12、nish Lets Do It 3 after class.2. Preview Lesson 26.【教学反思】参考答案：一、自主预习. 略. 1. fill a jar with water 2. cover the top with a piece of cardboard 3. turn the jar upside down 4. do an experiment 5. scientific method二、合作探究Task 1. 1. An experiment with a jar and a cardboard. 2. He thinks that the floor will get wet.Task 2. c d a b e四、当堂检测I1-5 TFTFT1. filled, with 2. covered, with 3. will get wet 4. am sure 5. do, observe 6. turn upside down7. Lets do, experiment8. pieces of paper9. scientific method10. Turn, over1-4 AACB