必修一Module-5《A-Lesson-in-a-Lab》.PPT

1、.1MOULE 5A Lesson in a Lab.2Do you know them?Albert EinsteinStephen hawkingMadam CurieAlfred Nobel.3Thomas EdisonLi ZhengdaoCharles DarwinNewton.4Match the following words.1.physics2.chemistry3.biologyAlfred NobelDarwinLi ZhengdaoThomas EdisonAlbert EinsteinNewtonMadam Curie.5Listen and choose. P411

2、.(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 ea

3、rths 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 a

4、s the moon. (b) The earth is forty-nine times larger than the moon.6oppositeheavenly body.7.8.9potassium （鉀）（鉀）Lets get to know some metals?k.10sodium(鈉鈉) calcium(鈣鈣)magnesium(鎂鎂)NaCaMg.11aluminum（鋁）（鋁） zinc（鋅）（鋅）iron（鐵）（鐵） copper （銅）（銅）ZnCuAlFe.12Look at the pictures. Do you know the names of the e

5、quipment？tongscrucibletest tube balanceBunsen burner .131.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

6、 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.14英語中基數(shù)詞、序數(shù)詞、分數(shù)、英語中基數(shù)詞、序數(shù)詞、分數(shù)、小數(shù)和百分數(shù)的讀法小數(shù)和百分數(shù)的讀法How to say the card

7、inal numbers, the ordinal numbers, fraction, decimals and percent.151.基數(shù)詞的讀法：基數(shù)詞的讀法：A. 先說先說“幾十幾十”， 再說再說“幾幾”，中間，中間用連字符。如：用連字符。如：23 89B. 先說先說“幾百幾百”， 再加再加and, ,再加末兩位再加末兩位數(shù)（或末位數(shù)）。如：數(shù)（或末位數(shù)）。如：twenty-three eighty-ninetwo hundred and twenty-threefour hundred and sixteeneight hundred and nine223 416 809 .16

8、C. 1000以上的數(shù)先從后向前數(shù)，每三位數(shù)加一以上的數(shù)先從后向前數(shù)，每三位數(shù)加一“,”（千分位）；第一個（千分位）；第一個“,”號前為號前為thousand; 第二個第二個“,”號前為號前為million; 第三個第三個“,”號前為號前為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 hund

9、red and oneseven hundred and fifty million.17序數(shù)詞一般以與之相應(yīng)的基數(shù)詞加詞序數(shù)詞一般以與之相應(yīng)的基數(shù)詞加詞尾尾-th構(gòu)成，如：構(gòu)成，如：tenth（第十），但下（第十），但下面這些基數(shù)詞在變序數(shù)詞時，面這些基數(shù)詞在變序數(shù)詞時， 有特別有特別的地方。如：的地方。如：2.序數(shù)詞的讀法序數(shù)詞的讀法 one two three five eight nine twelvefirstsecondthirdfiftheighthninthtwelfth.18We write1/5 2/33/7We sayone fifthFraction分數(shù)分數(shù)表達法式：分

10、子要用基數(shù)詞，分母用序數(shù)詞，表達法式：分子要用基數(shù)詞，分母用序數(shù)詞，如果分子大于一，分母必須用復(fù)數(shù)形式如果分子大于一，分母必須用復(fù)數(shù)形式two thirdsthree sevenths.19Fraction分數(shù)分數(shù)We writeWe say一些特殊的分數(shù)表達一些特殊的分數(shù)表達1/41/2 3/4a (one) quartera (one) halfthree quarters.20Decimals小數(shù)小數(shù)We writeWe say0.52.518.27zero point five/point fiveeighteen point two seventwo point five表達法式：小

11、數(shù)點以前按基數(shù)詞讀出，若整表達法式：小數(shù)點以前按基數(shù)詞讀出，若整數(shù)部分為數(shù)部分為0可讀作可讀作zero或或nought，也可以不，也可以不讀讀;小數(shù)點讀作小數(shù)點讀作point;小數(shù)點后按基數(shù)詞分別小數(shù)點后按基數(shù)詞分別單個讀出。小數(shù)點后的單個讀出。小數(shù)點后的0通常讀字母通常讀字母O的音。的音。.21百分數(shù)表達方式：百分數(shù)表達方式：%前是什么就讀什么，讀了之前是什么就讀什么，讀了之后加上百分號（后加上百分號（%）percent就可以了。就可以了。Percent百分數(shù)百分數(shù)We writeWe say27%6%0.68%twenty-seven percentsix percentzero poin

12、t six eight percent.22 Lets 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.23 It is hard to think of a world without metals. Different metals have different uses

13、, 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 r

14、eact most at the top, and the metals that react least at the bottom. .24.25Read 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 o

15、r fast reaction with steam? 5.Does copper react with water?.26 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 wat

16、er); (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, t

17、he nails have not rusted. Conclusion ：Iron does not rust in dry air.27 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

18、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. .28 Iron in ordinary water Method （1）. Half-fill a test tube with water and add two or three clean nails. （2）

19、. Leave the tube for one week. Result： The nails rust in the tube with ordinary water. Conclusion ：Iron rusts in ordinary water.29 1.Expend (1)vi.膨脹，擴張，增長e g. Water expands when it freeze. (2) vt. 展開，張開（帆，翅膀）擴大，發(fā)展 e g. The old hen expanded her wings to help her children. Expansion 為expand 的名詞形式“擴展，擴張，膨脹” e g. The suburbs are an expansion of cities.302.contract