【導讀】從文化的角度來看，鼓勵學生了解。國外有關科學教學的情況，以擴大學生的知識面，從而激發(fā)他們的學習興趣。程，達到預期的學習效果。通過本模塊的學習，培養(yǎng)學生自主學習的精神，熱愛學習，積極探索。自己讀出不同分子的分數(shù)。語課堂上找到成就感。觀察他們的特點，最終得出結(jié)論。在學習倍數(shù)句型時，將學生分為三大組，每個組負責討論并派代表寫。發(fā)展學生與人合作的意識和能力。學生提前預習本模塊知識，教師提前充分準備本模塊相關知識材料。INTRODUCTION這部分由三個內(nèi)容組成。GRAMMAR1這部分介紹了形容詞比較級中有關倍數(shù)的兩種主要用法：...times...中的重要性，并列舉了一些金屬在氧氣、水及蒸氣中的反應及其結(jié)果。合，并能正確使用。FUNCTION次序的問題是寫作中應注意的一個重要環(huán)節(jié)。TASK這一部分是對本模塊的一個復習與運用。要求學生能夠使用所學詞匯及實驗。VOCABULARY,GRAMMAR1和GRAMMAR2整合成一堂語法課。

　　

【正文】 ent. From the passage we can see how the experiment is done. What is the structure of a description of experiment? Who can e to the blackboard to write down the structure? S: Let me try. A student es to the blackboard and writes down the structure. A Simple Scientific Experiment: Introduction → Aim → Apparatus → Method → Result → Conclusion T: OK. We should notice that there are 3 different reactions which are respectively described with method, result and conclusion. Now, please read the passage and then fill in the table. Let the students do the job, and then check the answers with the whole class. T: Well, what is ordinary water according to the experiment? S6: I think ordinary water here means the water that has not been boiled, and has air in it. T: Right. We also call ordinary water “ raw water” . Now what’ s “ Bunsen burner” ? We often find it in labs. Now, turn to page 46, and find the picture of Bunsen burner. Task 2: Activity 5 T: Now please turn to page 46. Look at Activity 5. Read Passage B again. Complete the sentences. After the students finish the sentences, ask some of them to read out the plete sentences and check the answers with the whole class. Task 3: Activity 6 This part is about vocabulary study. Let the students read after the teacher, and then work in pairs to find the meanings of the new words. Explanations of some words: React: have effect on (of one substance applied to another) Steam: gas from boiling water Oil: liquid which does not mix with water, obtained from animals, plants or found in rock underground Boil: (of water or other liquid) reach the temperature at which change to gas occurs Scientific: of, for, connected with, used in science Experiment: test carried out carefully in order to study what happens and gain new knowledge Float: be held up in air, gas or on the surface of liquid。 move with liquid or air Form: give shape or form to。 make, produce Dissolve: (of a liquid) soak into a solid so that the solid itself bees liquid Step Ⅴ Language Points Ask the students to translate the following sentences, and get familiar with the sentence structures. Show the following sentences on the screen. 1. It is hard to think of a world without metals. 2. It is important to know how they react with different substances, for example, water and oxygen. 3. This makes sure there is no air in the water. T: Before we finish this class, let’ s look at the screen. There are three sentences on it. Can you translate them into Chinese? Let the students translate the sentences into Chinese. T: OK. In fact, these sentences involve two sentence structures. One is: it is + adj. + to do something. The other is an object clause. Now let’ s look at more sentences to get familiar with the two sentence structures. Write down the structures on the blackboard and then show the students more sentences on the screen: 1. It’ s hard (difficult) to say which is better. 2. It’ s foolish (silly) to act like that. 3. It’ s easy to learn a foreign language. 4. It’ s impossible to finish the job in one day. 5. It’ s wrong to steal. 6. I only came to make sure that everything was all right. 7. Father makes sure that all the lights are off before he goes to bed. 8. Make certain that your facts are right. 9. We must make certain that she can e. Let the students translate the sentences. If they have any difficulty, give them some help. Step Ⅵ Homework T: Today, we have learned some new words and two passages about scientific experiment. After class, please do Exercises 6, 7 and 8 on pages 92amp。93. These exercises can help us remember the new words and expressions about scientific experiment. OK, that’ s all for today. See you next time. Ss: See you.