1、Module 5 A Lesson in a LabIntroduction By KarenThey are doing experiments.Aims We are going to:1.Learn some English words for science and experiments.2.Learn to read numbers,fractions,decimals and percentages.Hopefully,we will be able to do some simple operation(运算)in English.liquid solidexpandcontr
2、actsubstancemixtureoxygensteeln.液体液体n.固体固体vi.膨胀膨胀vi.收缩收缩n.物质物质n.混合物混合物n.氧气氧气n.钢钢Listen and your answers to the quiz.1.(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
3、 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 25,5000 kilometres.(b)The distance of the sun from the earth is 150,500,500 kilometers.6.(
4、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.Read the following numbers out 2,000,000 (two million)5,100,000 (five million,one hundred thousand)12,269,000 (twelve million,
5、two hundred and thirty-nine thousandPractice:52,470,383 100,000,000365,528,462 1,000,000,000Read these fractions:1/4(a quarter)1/3 (a third)4/5(four-fifths)1/10 (one tenth)3/4(three quarters)1/2(a half)2/3(two-thirds)5/8 (five-eighths)9/10 (nine-tenths)2,000,000 5,104,080,005365,528,462 34,456,76512
6、,345,678,900thousandmillionbillion3.4 0.7 80.13 64.07 3.45 346.7849.56 forty nine point five sixHow to read the decimals?0 zero/naughtHow to read these fractions?How to read these fractions?a quartertwo-thirds32212101543125461121197 90%20.05%99%65%77.5%0.26%23%twenty three percentPractice:Read the f
7、ollowing out:1.1/2 of 6,000,000 2.35,246,000 plus 12,800,0003.25%of 200,000,000(three million)(forty eight million,sixty thousand)(fifty million)4.260,408,396 plus 5,284,7005.10%of 800,000,000(two hundred and sixty five million,six hundred and ninety-three thousand,ninety-six)(eighty million)Read ou
8、t the decimals below:0.5 (point five)2.5 (two point five)18.27 (eighteen point two seven)Practice:2 1/2 =2.5 (two point five)2 1/4=2.25(two point two five)3/4=0.75(point seven five)12 3/10=12.3(twelve point three)Read and answer1.What is of 6,000,000?2.How much is 35,246,000 plus 12,800,000?3.What i
9、s 25%of 200,000,000?4.How much is 260,408,396 plus 5,284,700?5.What is of 1,000,500,000?6.What is 10%of 800,000,000?3,000,0003,000,00048,046,00048,046,00050,000,00050,000,000265,693,096265,693,096750,375,000750,375,00080,000,00080,000,000Homework1.Finish Exercises on P 92-93.2.Preview Reading.加减乘除1.
10、加，and,add,plus2+3=?How much is two plus three?2+3=5Two plus three five.Two three five If we two three,we get five 加减乘除2.减，minus,take from106?How much is ten six?10-6=4 Ten six four six ten the remainder four.Six from ten is four 加减乘除3.乘,time,multiply 3X4?How much three four?3X4=12 Three four twelve three four，we get twelve Three four twelve 加减乘除4.除,用divide的过去分词形式表示 164=?How much sixteen four?1644 Sixteen four four Sixteen four four practice38=?3012=?285=?999=?
