市优质资源评比优秀作品九年级上册Unit4AmazingScience.ppt

1、unit 4 amazing sciencetopic1 when was it invented?修订人：修订人： 韩慧灵韩慧灵1.复习掌握语法被动语态，并能用之去做题。2.复习并背诵一些功能句。 3.通过阅读短文，理解什么是gps定位系统及其在生活中的应用。 学习目标自学指导11.自学内容：课本87页grammar。2.自学方法：背诵、观察、总结。3.自学时间：5分钟4.自学要求：背诵并观察句子，然后总结出被动语态的构成规律，并能用之去做题。grammar passive voice ()the radio was invented by guglielmo marconi in 1895

2、.when was the digital camera developed ?where was it developed?what is a rocket used for?it was developed in the 1970s. it was developed in japan.it is used for sending satellites or spaceships into space. passive voice was /were +done( ) 1. a big supermarket _in our city last year. a. is built b. w

3、ere built c. was built ( ) 2.could you tell me who the radio _ by? a. invents b. invented c. was invented( ) 3. many trees and flowers _ in our school last year. they made our school more beautiful. a. have planted b. were planted c. planted( ) 4.the children _ swim last month and they can swim very

4、 well now. a. are taught b. were taught c. were taught to( ) 5.it is said that potato chips _by mistake about one hundred years ago. a. were invented b. invented c. are inventedcbcac自学检测自学检测1自学指导自学指导2自学内容：课本自学内容：课本87页页functions.自学方法：背诵。自学方法：背诵。自学时间：自学时间：3分钟分钟自学要求：能够熟练掌握这些句子自学要求：能够熟练掌握这些句子.functions

5、i wish i could go into space some day. i hope your dream will come true. its said that he invented more than two thousand things during his life. inventing is interesting and exciting and everyone can be an inventor. 自学检测2 i i could go into space some day. i your dream will come true. he invented mo

6、re than two thousand things during his life. inventing is interesting and exciting and everyone . wishhopeits said thatcan be an inventor自学指导自学指导3 3自学内容：课本自学内容：课本87页的短文。页的短文。 自学方法：扫读。自学方法：扫读。自学时间：自学时间：3分钟分钟自学要求：通过理解生词和短语，能够回答自学要求：通过理解生词和短语，能够回答88页的问题。页的问题。 1. how did the early explorers know where t

7、hey were? they found out where they were by using stars. 2. whats the disadvantage of using the stars as guiding marks? its disadvantage is that it didnt work well when the weather was bad and the stars could not be seen. 3. what is a gps? is it useful to use? it is like a man-made star. we can use

8、it at any time, in any place and in any weather to find out our position. it is very useful. 4. what do you think the gps will be used for in the future? 自学检测自学检测3key words:explore, explorer, mark find out, indirection work well, as long asthe rest of the timesolve, like, use, the shape of great inv

9、ention要点归纳要点归纳n.标示，记标示，记号，符号号，符号 v.做记号，做记号，做标记做标记根据首字母提示，完成短文。 thanks to gps, we can exactly know w _we are now. gps is like a man-made “star”. it can be u_ in any place and any weather condition to find out our p_. in the past, the early explorers had to use stars in the s_ to tell them where they

10、were, however, this method didnt work well when the weather was bad. so gps is a great invention that can help humans to better e_ our planets.hereositionsedkyxplore强化练习：强化练习：we learn: 1. some words : mark, explorer 2. some phrases: find out, in , direction, as long as, work well, the rest of the ti

11、me, be used to, the shape of 3. some sentences: this method worked well at night as long as the weather was good and the stars could be seen.we can: 1. use the passive voice of the simple past tense more properly. 2.talk about new technology gps. 3. develope our imagination and creativity by designi

12、ng our own inventions.知识小结知识小结( ) 1.hurry up, you _ on the phone. a. wantedb. was wanted c. are wanted( ) 2. some stories _the children by the teacher everyday. a. is told forb. are told for c. are told to( ) 3._that he has studied abroad for five years. a. it is saidb. it says c. that is said ( ) 4

13、.the window _ five minutes ago. a. is cleaned b. was cleaned c. can be cleaned( ) 5.the children _by the teachers at school. a. take care of b. are taken care c. are taken care of c cabc当堂训练( ) 6. i have no idea what _while i was asleep. a. happened b. was happened c. happens( ) 7. in some countries, tea _before meals. a. is servingb. is servedc. served( ) 8. this kind of books _well. a. doesnt sellb. isnt sellin