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1、Module5AlessoninalabIntroductionIntroduction-3.Quiztime.(4m)ChoosethecorrectanswerstothequizinPart1.Thenlistenandcheckyouranswers.Waterexistsasasolid,aliquidandagas.Whenyouheatametal,itexpands.Steelisamixtureofironandothersubstances.Two-thirdsoftheearth’ssurfaceiswater
2、.Thedistanceofthesunfromtheearthis150,500,500kilometres.Theearthis4.6billionyearsold.Theearthisforty-ninetimeslargerthanthemoon.Answers:Introduction–4.Classification(2m)Putthewordsinpairsorgroups.contractairearthgasliquidoxygenmoonsolidmoonsolidexpandsun1234air–gas-oxy
3、gencontract-expandearth–sun-moongas–liquid-solidIntroduction–5.Classification(2m)Putwordsintherightplace.electricityironmetalsteelairglassnaturalman-madebothelectricityironairsomemetalssteelglasssomemetalselectricitysomemetals(alloyforexample)Lookatthepicturescollected
4、byourclassmates.Doyouknowthenameoftheseequipment？testtubetongsbalancecruciblebeaker&glassrodBunsenburnerSinceyouareinterestedindoingscientificexperiments,nowlet’sgettoknowsomevocabularyandknowledgerelatedtoscienceandexperiment.Potassium（钾）Sodium(钠)Calcium(钙)Magnesium(镁
5、)Aluminium（铝）Zinc（锌）Iron（铁）Copper（铜）Vocabulary英语中基数词、序数词、分数、小数和百分数的读法1.基数词的读法：A.先说“几十”，再说“几”，中间用连字符。如：23—89—B.先说“几百”，再加and,再加末两位数（或末位数）。如：223—416—809—twenty-threeeighty-ninetwohundredandtwenty-threefourhundredandsixteeneighthundredandnineC.1000以上的数先从后向前数，每三位数加一“,”（千分位）
6、；第一个“,”号前为thousand;第二个“,”号前为million;第三个“,”号前为billion。如：1,001—4,000—9,743—174,301—750,000,000—onethousandandonefourthousandninethousand,sevenhundredandforty-threea(one)hundredandseventy-fourthousand,threehundredandonesevenhundredandfiftymillion2.序数词的读法序数词一般以与之相应的基数词加词尾-
7、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：A.one—two—three—five—eight—nine—twelve—firstsecondthirdfiftheighthninthtwelfthfractionWewrite1/51/61/74/7Wesayonefifthonesixthoneseventhfoursevenths7/1097/111sevententhsninety-sevenonehundredandelevenths45/87forty-fiveeighty-sev
8、enths总结:你能看出他们有什么特点吗？分子用基数词,分母用序数词;分子大于1,分母的序数词需要加s。另外,还有几个特殊表达的情况:1/21/41/33/42/3Ahalfisthesameas50percent.onehalfon
