必修一Module-5《A-Lesson-in-a-Lab》.ppt

MOULE 5A Lesson in a LabDo you know them?Albert EinsteinStephen hawkingMadam CurieAlfred NobelThomas EdisonLi ZhengdaoCharles DarwinNewtonMatch the following words.1.physics2.chemistry3.biologyAlfred NobelDarwinLi ZhengdaoThomas EdisonAlbert EinsteinNewtonMadam CurieListen and choose.P411.(a)Water exists as a solid,a liquid and a gas.(b)Water exists as a solid and a liquid only.2.(a)When you heat a metal,it expands.(b)When you heat a metal,it contracts.3.(a)Steel is a mixture of iron and other substances.(b)Steel is a mixture of iron and oxygen.4.(a)Two-thirds of the earths surface is water.(b)50%of the earths surface is water.5.(a)The distance of the sun from the earth is 25.500 kms.(b)The distance of the sun from the earth is 150,500,500 kms.6.(a)The earth is 4.6 million years old.(b)The earth is 4.6 billion years old.7.(a)The earth is twice as large as the moon.(b)The earth is forty-nine times larger than the moon.Put the words in pairs or groups.contract air earthcontract air earth gas liquid oxygen gas liquid oxygenmoon solid expand sunmoon solid expand sun1 12 23 34 4air gas-oxygenair gas-oxygencontract-expandcontract-expandearth sun-moonearth sun-moongas liquid-solidgas liquid-solidoppositeheavenly bodyPut words in the right place.electricityelectricity iron iron metal metal steel steel air air glassglassnaturalnaturalman-mademan-madebothbothelectricity iron air some metalselectricity iron air some metalssteel glass some metalssteel glass some metalselectricity some metalselectricity some metalspotassium （钾）（钾）Lets get to know some metals?ksodium(钠钠)calcium(钙钙)magnesium(镁镁)NaCaMgaluminum（铝）（铝）zinc（锌）（锌）iron（铁）（铁）copper（铜）（铜）ZnCuAlFeLook at the pictures.Do you know the names of the equipment？tongscrucibletest tube balanceBunsen burner 1.You use a _to heat things when you do an experiment.2.You put things into a glass _to mix them,or to heat them,or to keep them.3.You use a_ to weigh the things you use in an experiment.4.A _is a ceramic sirmik（陶瓷的）（陶瓷的）bowl which you use to heat things to a very high temperature.5.You use _ to pick up things which are too hot or dangerous to pick up with your hands.Bunsen burnertest tubebalancecrucibletongsWhen do you use them?Use the equipment to fill the blanks.英语中基数词、序数词、分数、英语中基数词、序数词、分数、小数和百分数的读法小数和百分数的读法How to say the cardinal numbers,the ordinal numbers,fraction,decimals and percent.1.基数词的读法：基数词的读法：A.先说先说“几十几十”，再说再说“几几”，中间，中间用连字符。如：用连字符。如：23 89B.先说先说“几百几百”，再加再加and,再加末两位数再加末两位数（或末位数）。如：（或末位数）。如：twenty-three eighty-ninetwo hundred and twenty-threefour hundred and sixteeneight hundred and nine223 416 809 C.1000以上的数先从后向前数，每三位数加一以上的数先从后向前数，每三位数加一“,”（千分位）；第一个（千分位）；第一个“,”号前为号前为thousand;第二个第二个“,”号前为号前为million;第三个第三个号前为号前为billion。如：。如：1,001 4,000 9,743 174,301750,000,000 one thousand and onefour thousandnine thousand,seven hundred and forty-threea(one)hundred and seventy-four thousand,three hundred and oneseven hundred and fifty million序数词一般以与之相应的基数词加词序数词一般以与之相应的基数词加词尾尾-th构成，如：构成，如：tenth（第十），但下（第十），但下面这些基数词在变序数词时，面这些基数词在变序数词时，有特别有特别的地方。如：的地方。如：2.序数词的读法序数词的读法 one two three five eight nine twelvefirstsecondthirdfiftheighthninthtwelfthWe write1/5 2/33/7We sayone fifthFraction分数分数表达法式：分子要用基数词，分母用序数词，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如果分子大于一，分母必须用复数形式two thirdsthree seventhsFraction分数分数We writeWe say一些特殊的分数表达一些特殊的分数表达1/41/2 3/4a(one)quartera(one)halfthree quartersDecimals小数小数We writeWe say0.52.518.27zero point five/point fiveeighteen point two seventwo point five表达法式：小数点以前按基数词读出，若整表达法式：小数点以前按基数词读出，若整数部分为数部分为0可读作可读作zero或或nought，也可以不，也可以不读读;小数点读作小数点读作point;小数点后按基数词分别小数点后按基数词分别单个读出。小数点后的单个读出。小数点后的0通常读字母通常读字母O的音。的音。百分数表达方式：百分数表达方式：%前是什么就读什么，读了之前是什么就读什么，读了之后加上百分号（后加上百分号（%）percent就可以了。就可以了。Percent百分数百分数We writeWe say27%6%0.68%twenty-seven percentsix percentzero point six eight percentLets practice some numbers5/74/515.2%0.06%45.39.215.154five seventhfifteen point two percentzero point o six percentforty-five point threenine point twofifteen point one five fourfour fifths It is hard to think of a world without metals.Different metals have different uses,for example,steel is used in cars,and iron is used in electrical equipment.When we use metals,it is important to know how they react with different substance,for example,water and oxygen.The reaction of metals with these substances can be put in order.Here is a table with the metals that react most at the top,and the metals that react least at the bottom.Read the passage again.Answer these questions.1.Which of the metals in the table reacts the most with oxygen and water?2.What happens when you heat calcium in oxygen?3.Which metals react with steam?Does iron have a slow or fast reaction with steam?5.Does copper react with water?A Simple Scientific Experiment Below is a description of a simple scientific experiment.It shows us how iron reacts with air and with water.Aim:To find out if iron rusts(a)in dry air;(b)in water that has no air in it(air-free water);(c)in ordinary water.Apparatus:3 clean iron nails;test tubes;test tube holder;cotton wool;oil;Bunsen burner.Iron in dry air Method（1）.Put some iron nails at the bottom of a test tube.（2）.Push some cotton wool down the tube.（3）.Leave the tube for one week.Result：After one week,the nails have not rusted.Conclusion：Iron does not rust in dry air.Iron in air-free water Method（1）.Half-fill a test tube with water.（2）.Boil the water for three minutes.(This makes sure there is no air in the water.)（3）.Put two or three clean nails in the water.（4）.Add some oil to the water.This will keep air out of the water.（5）.Leave the tube for one week.Result：The nails do not rust in the tube with air-free water.Conclusion：Iron does not rust in air-free water.Iron in ordinary water Method（1）.Half-fill a test tube with water and add two or three clean nails.（2）.Leave the tube for one week.Result：The nails rust in the tube with ordinary water.Conclusion：Iron rusts in ordinary water.1.Expend (1)vi.膨胀，扩张，增长e g.Water expands when it freeze.(2)vt.展开，张开（帆，翅膀）扩大，发展e g.The old hen expanded her wings to help her children.Expansion 为expand 的名词形式“扩展，扩张，膨胀”e g.The suburbs are an expansion of cities.2.contract(1)vi.收缩，缩小 常用with连用Metals contract is cold weather.(2)vt.缔结，订约，得病，沾染习惯，使缩小They ve contacted an agreement.I contracted a cold.(3)n.合同契约，enter into/make/sign/have a contract with与 签订合同make a contract with 与签合同sign a contract签署合同 carry out a contract 履行合同3equipment un.设备 equip v 配备、装备 equip sb with sth 用某物来装备某人=be equipped with4.react v 对.反应，对有影响，起作用 react to.对有反应 react on upon 对有作用影响 reaction n 反应，影响 reactive adj 有反应的，易反应的5.conclusion n.结论；断定；结束；结局；协定，协议 come to/arrive at/reach/draw a conclusion得出结论in conclusion最后 conclude v.结束；断定;订立 conclude with以而结束6.astonished adj 人感到吃惊的 astonishing adj 令人吃惊的 astonishment n 惊讶