高中英语Unit 20 Lesson 3 Scientific Breakthroughs 1北师大版选修7

Unit 20 Lesson 3 Scientific BreakthroughsTeaching aims1.words and phrases：2.language points in the text3.reading strategies4.exercises about text5.vocabulary:phrasal verbs and compound wordsTeaching timeTwo periods(两课时连堂)Teaching processStep 1 RevisionReview the new words of lesson 2 and have a dictionStep 2 learn the new words of lesson 31.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, encourage them to ask the teacher .step 3 reading1.discuss the pictures and talk about the scientists major discoveries.2.do exercise 2 by themselves.3.let the students look at Reading Strategies and check their answers to exercise 1 and 2.4.play the tape twice, and do exercise 4.step 4 language points1.think over v.仔细考虑, 重新考虑2.be aware of v.知道, 意识到eg: Everybody is aware of the importance of study.每个人都意识到了学习的重要性。I was not aware of the fire.我没有意识到火。3.such as adv.例如.,象这种的, 诸如., 譬如说; 象.那样的; 如此.以致4.a piece of mass5.an amount of adj.许多, 相当数量的; 一些6.theory of relativity7.for example8.at the speed of以.的速度at a speed of eighty miles an hour 以每小时80英里的速度at fulltop speed 用全速, 开足马力尽力地; 尽快地9.be about to v.将要, 正打算eg: The chorus is about to sing.合唱团就要开始唱了10.in fact11.away from远离12.the further away galaxies are, the faster they move.13.go on holiday正在休假去休假14.come back v.回来, 在记忆中重现, 复原, 恢复, 反驳15.throw away v.扔掉, 丢弃16.out of the ordinary不平常的, 非凡的,例外的17.a few years later18.look for19.sothat20.turn on v.开启, 变得兴奋, 突然装出, 开始21.go out v.出去, 熄灭, 过时, 罢工, 向往, 辞职, 倒塌22.be interested in对.感兴趣23.at the time当时, 在那个时候24.make the first flight25.make great contributions to贡献step 5 vocabulary1.phrasal verbsa)exercise 7ask the students to read the list of phrasal verbs, and then let them do the exercise by themselves, and check their answers.b)ask ten students to do the exercise on the blackboard, then correct their answers.c)read the questions in exercise 9, and then play the cassette twice.d)ask six students to answer the pound words(合成词)a)合成名词：名词+名词 spaceship classroom动词+介词 turn-off形容词+名词 highway合成动词：safe-guard mass-produce ill-treat合成形容词：cold-blood h