《A-lesson-in-a-lab》教案正式版(共6頁)

1、Module 5 A lesson in a labPeriod 1Teaching aims: 1. Let the students know some words related to experiments, the lab and something like that 2. Review the usage of numbers/ fractions/ percentages 3. Know sth about Degrees of comparison.Teaching steps: I. All of us have learned physics, biology and c

2、hemistry in middle school. Now lets have a test to see how much you know. Deal with Activity 1 on page 41. Choose the correct answers to the quiz. Now play the tape for the students to listen and check their answers. Answers:1 a2 a3 a4 a 5 b 6 b 7 b II. First read the words and then ask the ss to tr

3、anslate them into Chinese. At last put them in pairs or groups. Answers: air-gas-oxygen contract-expand earth- sun- moon gas-liquid-solid III. Answer the questions. Answers: 1) Electricity, iron, some metals and air are natural 2) Steel, some metals and glass are man-made 3) Electricity and some met

4、als can be man-made and occur naturallyIV. Turn to page 42. Activity 1 Read the numbers. Pay attention to the position of the word “ and”.V. Fractions.基數詞+序數詞，當分子大于1時，分母要加s作主語時，謂語動詞要根據of 后面的名詞決定。Answers:two-fifths five-eighths nine-tenths three-eighths five-sixthsVI. Percentages基數詞+ percent/ per cen

5、t 注意：percent 永遠單數形式作主語時，謂語動詞要根據of 后面的名詞決定。VII. Degrees of comparison 1 & 2英語倍數表達法 用英語表達A 是 B 的 N 倍長（寬，高，大，重等），A 比 B 長（寬，高，大，重等）N 倍 或A 的長度（寬度，高度，大小，重量等）是 B 的 N 倍，可用下列幾種句型。1.A + be + 倍數 + as + 計量形容詞原級 + as + B. This tree is three times as tall as that one. 這棵樹是那棵樹的三倍高。 His father is twice as old as he

6、. 他父親的年紀有他兩倍大。 2.A + be + 倍數 + 計量形容詞比較級 + than + B The Yangtze River is almost twice longer than the Pearl River. 長江差不多比珠江長兩倍。 The dictionary is exactly five times more expensive than that one. 這本字典比那本恰好貴5倍。 3.A + be + 倍數 + the + 計量名詞 + of + B The newly broadened square id four times the size of the

7、 previous one. 新擴建的廣場是未擴建時的四倍大。 4.The + 計量名詞 + of + A + be + 倍數 + that + of + B The size of the newly broadened square is four times that of the previous one. 新擴建的廣場為以前的四倍大。 5.其它 Im twice/ double his age. 我的年齡是他的兩倍。 Ive paid five times the usual price for the stamp. 我出了5倍于往常的價格買這枚郵票。 The average inc

8、ome of the staff has been increased by 50 percent compared with last year. 與去年相比，該單位職工的收入增加了50%. The price of TVs are twofold( adj. 兩部分的, 雙重的) down over these years. 近幾年來，電視機的價格下降了兩倍。 the +比較級，the +比較級意為“越，越”。前面部分是從句，后面部分是主句。The harder you work, the more successful you will be. The earlier you come,

9、 the better place you can find. “比較級+and+比較級”表示“越來越”。He becomes fatter and fatter比較級前還可以用much，even，still，a little等來修飾。 Home workDeal with the exercises on pages 45 , 46 and 47Module 5 A lesson in a labPeriod 2Teaching aims: 1. Revise the usage of Degrees of Comparison by translating some sentences.

10、2. Know more about the two experiments Teaching steps: I. Translate the following sentences into English. 1這座新大樓是那幢舊樓的3倍大小。 The new building is three times the size of the old one. The new building is three times larger than the old one. The new building is three times as large as the old one. 2孫老師說

11、英語和你一樣流利。 Mr Sun speaks English as fluently as you. 3他越努力學習，就越感到快樂。 The harder he works, the happier he feels. 4那個女孩越長越漂亮了。 The girl becomes more and more beautiful. II. Come to the Reading and Vocabulary. Ask the question: What are the stages of a scientific experiment?They are as follows: aimmetho

12、d-resultconclusion Now read passage A and finish Activities 2 and 3.Answer: The reaction of metals Answers: 1. potassium, calcium, and sodium 2. It burns to form an oxide 3. Magnesium, aluminum, and zinc 4. It has a slow reaction. 5. No, it doesnt.III. Prepare for the test.Prepare some test tubes, s

13、ome oil, test tube holder, cotton wool, iron nails, Bunsen burner. Describe the experiment to the students and ask the students to explain what will happen in the end.Ask the students to read Passage B and try to fill in the table on page 45.Answers:Iron in dry airiron in air-free wateriron in ordin

14、ary waterStage AStarting experimentcotton woolwaterwaterStage B1 week laternailswaterStage CResultIron doesnt rustIron does not rust.Iron rusts.Ask the students to read the text for some time and try to retell the experiment with the help of the table.If there is time, check if some can.IV. Homework

15、: Retell the experiment and report a similar experiment.Module 5 A lesson in a labPeriod 3Teaching aims: Enabling the students to 1. know how to read the decimals. 2. know sth about the science teaching in a senior high school.Teaching steps：I. Ask some students to read the following numbers: 623,10

16、0,486 563,256,369 12,000,865,065 3/7 2/9 3/10 26% 48% 0.8 3.6 19.36 22.58II. Deal with Everyday English on page 48.Answers：1a 2b 3a 4b 5aIII. Turn to page 49. Cultural Corner. Look at this photo. This boy is Mark Kendon. Mark Kendon is a Canadian student at Senior High school. The passage is about h

17、is description of science teaching in his school. Now read the passage quickly and try to find the answers to the following question: Why has Mark become more interested in science? -Because he has moved to a new school with good facilities and teachers. Read the passage again and try to get as much

18、 information as possible. Do the following questions. Was Mark interested in science at first? -No. What happened to his feelings about science? -His feelings about science have now changed. How did he get interested in science? -The science teachers at the new school are excellent, the science facilities are very good, with labs that have all the latest equipment. We are taken to interesting public science lectures about four times a term.IV. Discussion 1. How do our teachers teach science subjects? 2. Is it a good idea to ask s