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Module 5 A lesson in a lab,Introduction,Introduction - 3.Quiz time.(4m) Choose the correct answers to the quiz in Part 1. Then listen and check your answers.,Water exists as a solid, a liquid and a gas. When you heat a metal, it expands. Steel is a mixture of iron and other substances. Two-thirds of the earths surface is water. The distance of the sun from the earth is 150,500,500 kilometres. The earth is 4.6 billion years old. The earth is forty-nine times larger than the moon.,Answers:,Introduction 4.Classification(2m) Put the words in pairs or groups.,contract air earth gas liquid oxygen moon solid moon solid expand sun,air gas - oxygen,contract - expand,earth sun - moon,gas liquid - solid,Introduction 5.Classification(2m) Put words in the right place.,electricity iron metal steel air glass,electricity iron air some metals,steel glass some metals,electricity some metals (alloy for example),Look at the pictures collected by our classmates. Do you know the name of these equipment？,test tube tongs balance,crucible beaker & glass rod Bunsen burner,Since you are interested in doing scientific experiments, now lets get to know some vocabulary and knowledge related to science and experiment.,Potassium （钾）,Sodium(钠),Calcium(钙),Magnesium(镁),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-three,eighty-nine,two hundred and twenty-three,four hundred and sixteen,eight hundred and nine,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： 1,001 4,000 9,743 174,301 750,000,000,one thousand and one,four thousand,nine thousand, seven hundred and forty-three,a (one) hundred and seventy-four thousand, three hundred and one,seven hundred and fifty million,2.序数词的读法,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：,A. one two three five eight nine twelve,first,second,third,fifth,eighth,ninth,twelfth,fraction,We write,1/5 1/6 1/7 4/7,We say,one fifth one sixth one seventh four sevenths,7/10 97/111,seven tenths,ninety-seven one hundred and elevenths,45/87,forty-five eighty-sevenths,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: 1/2 1/4 1/3 3/4 2/3 A half is the same as 50 percent.,one half one quarter one third 33.33r % r:recurring three quarters two thirds 66.66%,50%,25%,75%,百分数： percentage,5) 百分数的读法 27% 45% 86% ,twenty-seven percent,forty-five percent,eighty-six percent,Can you say the following in English correctly?,1,000 2,000 12,000 112,000 796,000,one thousand,two thousand,twelve thousand,one hundred and twelve thousand,seven hundred and ninety six thousand,879,457,eight hundred and seventy-nine thousand, four hundred and fifty-seven,1,000,000 9,000,000 32,000,000 212,000,000,one million,nine million,thirty-two million,two hundred and twelve million,988,766,688,nine hundred and eighty-eight million, seven hundred and sixty-six thousand, six hundred and eighty-eight,987,654,321,nine hundred and eighty-seven million, six hundred and fifty-four thousand, three hundred and twenty-one,1,000,000,000,one billion,9,000,000,000,nine billion,32,000,000,000,thirty-two billion,564,865,000,000,five hundred, sixty-four billion, eight hundred, sixty-five million,978,876,675,467,nine hundred and seventy-eight billion, eight hundred and seventy-six million, six hundred and seventy-five thousand, four hundred and sixty-seven,Practice,Now lets say: 2/5 5/8 9/10 3/8 5/6,two-fifths,five-eighths,nine-tenths,three-eighths,five-sixths,Can you say the following in English correctly?,0.5 0.8 0.76 1.23,point five point eight point seven six one point two three,23.45 100.32 87.675 7.564,twenty-three point four five,one hundred point three two,eighty-seven point six seven five,seven point five six four,point,point,point,point,总结：小数点用point,Read these questions aloud and say the answers.,What is of 6,000,000? 2. How much is 35,246,000 plus 12,800,000? 3. What is 25% of 200,000,000?,three million,forty-eight million, forty-six thousand,fifty million,4. How much is 260,408,396 and 5,284,700? two hundred, sixty-five million, six hundred, ninety-three thousand, ninety-six 5. What is of 1,000,500,000? seven hundred, fifty million, three hundred, seventy-five thousand 6. What is 10% of 800,000,000? eighty million,Homework,Finish Exercise 9 on P 93.,See you!,同学们,来学校和回家的路上要注意安全,同学们,来学校和回家的路上要注意安全,同学们,来学校和回家的路上要注意安全,同学们,来学校和回家的路上要注意安全,
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