Module5 Period1.ppt

1、,Module 5 A lesson in a lab,Period 1 Introduction, Vocabulary and Speaking and Vocabulary,Goals 1.To help the students learn the following words in this period. Words: liquid, expand, contract, substance, mixture, oxygen 2. To help the students revise the following words in this period. Words: air,

2、earth, gas, solid, iron, metal, steel, glass 3. To develop speaking ability by practicing saying the numbers, especially the fractions. Important and difficult points: 1. Arouse the students interests and love in science. 2. Make the students know how to read the numbers.,Lead-in Ask the students to

3、 give some examples about general science,For example:,1. In hot weather the temperature gets very high.,2. In spring days get longer and longer.,3. The moon goes around the earth.,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

4、 a metal, it expands. (b) When you heat a metal, it contracts.,Guess, listen and check the answer.,Listening,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.

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. (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 time

6、s larger than the moon.,Put the words in pairs or groups.,contract air earth gas liquid oxygen moon solid expand sun,air gas - oxygen,contract - expand,earth sun - moon,gas liquid - solid,Answer the questions：,Which of the above are natural? Electricity, iron, some metals and air are natural. 2. Whi

7、ch are man-made? Steel, some metals and glass are man-made.,electricity iron metal steel air glass,3. Which can be both? Electricity and some metals (alloys for example) can be man-made and occur naturally.,Speaking,英语中基数词、分数、小数和百分数的读法,Read the numbers in English.,2 21 201 2,001 20,001 200,001 2,000

8、,001,two twenty-one two hundred and one two thousand and one twenty thousand and one two hundred thousand and one two million and one,9,600,000 1,951,000,000,nine million, six hundred thousand one billion, nine hundred and fifty-one million,1. 基数词的读法：,如： 23,89,A. 先说“几十”， 再说“几”。,223 416 809,two hundr

9、ed and twenty-three,four hundred and sixteen,eight hundred and nine,A.先说“几百”， 再加and,再加末两位数（或末位数）。,twenty-three,eighty-nine,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 an

10、d one,seven hundred and fifty million,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。,基数词表示分子，序数词表示分母，除了分子是“1”的情况外，序数词要用复数。 2/3 7/9 5/12 ,one-fourth,two-thirds,seven-ninths,five-twelfths,two and three-fifths,thirty and seven-eighths,2. 分数词的读法,2,3,5,30,7,8,一些

11、特殊的表达法, ,a / one half,a / one quarter,three quarters,3. 小数的读法,7.8 0.4 0.03 0.125 14.397,seven point eight,zero point four,zero point zero three,zero point one two five,fourteen point three nine seven,4. 百分数的读法 27% 45% 86% ,twenty-seven percent,forty-five percent,eighty-six percent,1,000 12,000 112,0

12、00 796,000,one thousand,twelve thousand,one hundred and twelve thousand,seven hundred and ninety-six thousand,Practice,Can you say the following in English correctly?,879,457,eight hundred and seventy-nine thousand, four hundred and fifty-seven,1,000,000 32,000,000 212,000,000,one million thirty-two

13、 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

14、,32,000,000,000,thirty-two billion,564,865,000,000,five hundred and sixty-four billion, eight hundred and 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,Now lets say

15、: 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-

16、seven point six seven,seven point five six four,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 5,284,7