必修一Module-5A-Lesson-in-a-Labppt课件.ppt

MOULE5,ALessoninaLab,1,Doyouknowthem?,AlbertEinstein,Stephenhawking,MadamCurie,AlfredNobel,2,ThomasEdison,LiZhengdao,CharlesDarwin,Newton,3,Matchthefollowingwords.,1.physics,2.chemistry,3.biology,AlfredNobel,Darwin,LiZhengdao,ThomasEdison,AlbertEinstein,Newton,MadamCurie,4,Listenandchoose.P41,1.(a)Waterexistsasasolid,aliquidandagas.(b)Waterexistsasasolidandaliquidonly.2.(a)Whenyouheatametal,itexpands.(b)Whenyouheatametal,itcontracts.3.(a)Steelisamixtureofironandothersubstances.(b)Steelisamixtureofironandoxygen.4.(a)Two-thirdsoftheearthssurfaceiswater.(b)50%oftheearthssurfaceiswater.5.(a)Thedistanceofthesunfromtheearthis25.500kms.(b)Thedistanceofthesunfromtheearthis150,500,500kms.6.(a)Theearthis4.6millionyearsold.(b)Theearthis4.6billionyearsold.7.(a)Theearthistwiceaslargeasthemoon.(b)Theearthisforty-ninetimeslargerthanthemoon.,5,Putthewordsinpairsorgroups.,contractairearthgasliquidoxygenmoonsolidexpandsun,airgas-oxygen,contract-expand,earthsun-moon,gasliquid-solid,opposite,heavenlybody,6,Putwordsintherightplace.,electricityironmetalsteelairglass,electricityironairsomemetals,steelglasssomemetals,electricitysomemetals,7,Vocabulary,8,potassium（钾）,Letsgettoknowsomemetals?,k,9,sodium(钠),calcium(钙),magnesium(镁),Na,Ca,Mg,10,aluminum（铝）,zinc（锌）,iron（铁）,copper（铜）,Zn,Cu,Al,Fe,11,Lookatthepictures.Doyouknowthenamesoftheequipment？,tongs,crucible,testtube,balance,Bunsenburner,12,1.Youusea_toheatthingswhenyoudoanexperiment.2.Youputthingsintoaglass_tomixthem,ortoheatthem,ortokeepthem.3.Youusea_toweighthethingsyouuseinanexperiment.4.A_isaceramicsirmik（陶瓷的）bowlwhichyouusetoheatthingstoaveryhightemperature.5.Youuse_topickupthingswhicharetoohotordangeroustopickupwithyourhands.,Bunsenburner,testtube,balance,crucible,tongs,Whendoyouusethem?Usetheequipmenttofilltheblanks.,13,英语中基数词、序数词、分数、小数和百分数的读法,Howtosaythecardinalnumbers,theordinalnumbers,fraction,decimalsandpercent.,14,1.基数词的读法：,A.先说“几十”，再说“几”，中间用连字符。如：2389,B.先说“几百”，再加and,再加末两位数（或末位数）。如：,twenty-three,eighty-nine,twohundredandtwenty-three,fourhundredandsixteen,eighthundredandnine,223416809,15,C.1000以上的数先从后向前数，每三位数加一“,”（千分位）；第一个“,”号前为thousand;第二个“,”号前为million;第三个“,”号前为billion。如：1,0014,0009,743174,301750,000,000,onethousandandone,fourthousand,ninethousand,sevenhundredandforty-three,a(one)hundredandseventy-fourthousand,threehundredandone,sevenhundredandfiftymillion,16,序数词一般以与之相应的基数词加词尾-th构成，如：tenth（第十），但下面这些基数词在变序数词时，有特别的地方。如：,2.序数词的读法,onetwothreefiveeightninetwelve,first,second,third,fifth,eighth,ninth,twelfth,17,Wewrite,1/52/33/7,Wesay,onefifth,Fraction分数,表达法式：分子要用基数词，分母用序数词，如果分子大于一，分母必须用复数形式,twothirds,threesevenths,18,Fraction分数,Wewrite,Wesay,一些特殊的分数表达,1/41/23/4,a(one)quarter,a(one)half,threequarters,19,Decimals小数,Wewrite,Wesay,0.52.518.27,zeropointfive/pointfive,eighteenpointtwoseven,twopointfive,表达法式：小数点以前按基数词读出，若整数部分为0可读作zero或nought，也可以不读;小数点读作point;小数点后按基数词分别单个读出。小数点后的0通常读字母O的音。,20,百分数表达方式：%前是什么就读什么，读了之后加上百分号（%）percent就可以了。,Percent百分数,Wewrite,Wesay,27%6%0.68%,twenty-sevenpercent,sixpercent,zeropointsixeightpercent,21,Letspracticesomenumbers5/74/515.2%0.06%45.39.215.154,fiveseventh,fifteenpointtwopercent,zeropointosixpercent,forty-fivepointthree,ninepointtwo,fifteenpointonefivefour,fourfifths,22,Itishardtothinkofaworldwithoutmetals.Differentmetalshavedifferentuses,forexample,steelisusedincars,andironisusedinelectricalequipment.Whenweusemetals,itisimportanttoknowhowtheyreactwithdifferentsubstance,forexample,waterandoxygen.Thereactionofmetalswiththesesubstancescanbeputinorder.Hereisatablewiththemetalsthatreactmostatthetop,andthemetalsthatreactleastatthebottom.,23,24,Readthepassageagain.Answerthesequestions.,1.Whichofthemetalsinthetablereactsthemostwithoxygenandwater?2.Whathappenswhenyouheatcalciuminoxygen?3.Whichmetalsreactwithsteam?Doesironhaveasloworfastreactionwithsteam?5.Doescopperreactwithwater?,25,ASimpleScientificExperimentBelowisadescriptionofasimplescientificexperiment.Itshowsushowironreactswithairandwithwater.Aim:Tofindoutifironrusts(a)indryair;(b)inwaterthathasnoairinit(air-freewater);(c)inordinarywater.Apparatus:3cleanironnails;testtubes;testtubeholder;cottonwool;oil;Bunsenburner.IronindryairMethod（1）.Putsomeironnailsatthebottomofatesttube.（2）.Pushsomecottonwooldownthetube.（3）.Leavethetubeforoneweek.Result：Afteroneweek,thenailshavenotrusted.Conclusion：Irondoesnotrustindryair.,26,Ironinair-freewaterMethod（1）.Half-fillatesttubewithwater.（2）.Boilthewaterforthreeminutes.(Thismakessurethereisnoairinthewater.)（3）.Puttwoorthreecleannailsinthewater.（4）.Addsomeoiltothewater.Thiswillkeepairoutofthewater.（5）.Leavethetubeforoneweek.Result：Thenailsdonotrustinthetubewithair-freewater.Conclusion：Irondoesnotrustinair-freewater.,27,IroninordinarywaterMethod（1）.Half-fillatesttubewithwaterandaddtwoorthreecleannails.（2）.Leavethetubeforoneweek.Result：Thenailsrustinthetubewithordinarywater.Conclusion：Ironrustsinordinarywater.,28,1.Expend(1)vi.膨胀，扩张，增长eg.Waterexpandswhenitfreeze.(2)vt.展开，张开（帆，翅膀）扩大，发展eg.Theoldhenexpandedherwingstohelpherchildren.Expansion为expand的名词形式“扩展，扩张，膨胀”eg.Thesuburbsareanexpansionofcities.,29,2.contract(1)vi.收缩，缩小常用with连用Metalscontractiscoldweather.(2)vt.缔结，订约，得病，沾染习惯，使缩小Theyvecontactedanagreement.Icontractedacold.(3)n.合同契约，enterinto/make/sign/haveacontractwith与签订合同makeacontractwith与签合同signacontract签署合同carryoutacontract履行合同,30,3equipmentun.设备equipv配备、装备equipsbwithsth用某物来装备某人=beequippedwith