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111Unit 20 Warm-up and Lesson 1Teaching aimsI. words and phrases：frontier telescope atom microscope astronomy bacteria radium solar crew panel institute compute sense impact ethical radioactive polonium seminar life-sized screen handy biochemistry theoretically robot database meanwhile source exploration barbershopartificial intelligence, light year, search engine, solar system, take over, carry out, data processing, the International Space Station, click into, in terms of, II. listening and discussion about something of scienceIII.to read the text and study the language pointsTeaching time Two periodsTeaching processStep 1 RevisionStep 2 new words learning1.ask some students to read the new words first and correct their pronunciation2.play the tape and have them read after the tape3.give them a few minutes to read the new words freely ,tell them if they cant read the words,encoreage them to ask the teacher .Step 3 Warm-up1.Read unit objectives, and ask the students to tell us the meanings.2.Exercise 1 a) let the students read the words and then match the branches of science with the pictures. b)to discuss the pictures with the class3.Exercise 2 a)let the students read the Key Words and make sure that they really understand the meanings of the Key Words. b)students do the exercise individually, and then check their answers4.Exercise 3 a)make sure the class know what to do. Then play the tape twice, ask some students to say their answers to the class.5.Exercise 4 a)read the questions first b)have the students work in pairs and discuss the questionsstep 4 Reading1.Before you start a) read the exercise 1 and ask the students if they know the phrases meaning. And give them a few minutes to discuss the answers b)check their answers and ask them to give reasons for their answers.2.Read to learna) ask the students look at exercise 2, and then play the cassette twice.b) give them ten minutes to read the text and fill the table.c) check theirs answers3.Language pointsa) look into向.的里面看, 窥视; 浏览;观察, 调查e.g.: The mayor promised to look into whether the clash was designed, or it just happened by accident. 市长答应调查这次冲突是预先计划好的,还是偶然发生的。He looked through a number of journals before he started the research project.他在进行该项研究课题前查阅了许多期刊。b) hundreds of好几百, 许许多多c) communicate with通话, 通信;英（房间等）互通to communicate with a person 与人联络eg:The Minister for Foreign Affairs has already communicated on this event with the American President. 外交部长已经跟美国总统就此事件交换过意见了。This room communicates with the other room. 这个房间与那一个房间相通。d) in terms of adv. 根据, 按照, 用.的话, 在.方面; 以的观点；就而说g)the amount of 数目an amount of相当数量的; 一些 a large amount of大量h)carry out 完成, 实现, 贯彻, 执行e.g.：I have carried out my work. 我已经完成了我的工作。i)by the year 2020 到2020年之前 by the middle of the century到本世纪中叶之前 by the end of the century到本世纪末j)millions of times数以百万倍的k)linkto （与on, to, in to连用）联合，（常与together, to, with连用）连接l) suitable for/to adj.适合.的e.g.: This toy is not suitable for young children. 这个玩具不适合小小孩玩。books suitable for children适合儿童阅读的书籍This wine is not suitable to my taste.这酒不合我的胃口。m)bothand 既.又.step 5 Summary and exercise a)summary: important phrases b)exercise 1 in page 66step 6 homework copy the new words111
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