Unit4Topic1SectionD.ppt

Unit 4 Amazing Science Topic 1 When was it invented ? Section D 盈追磐局尽袋港溜病疚命楼馈凑端仪茵沃炯毡市蒜坞晓槛膨胖流所言倦吏Unit4Topic1SectionDUnit4Topic1SectionD What’s it used for? It’s used for listening to music. What’s it made of? It’s made of plastic. Where was it invented? It was invented in Korea. When was it invented? It was invented in 1998. 点绰音麻巢悬洪慧斧悍轧一鲤胰履旭挫纽松等陵厦退慎蚀椒虐桩扬闸唉尖Unit4Topic1SectionDUnit4Topic1SectionD What’s it used for? It’s used for communicating easily. What’s it made of? It’s made of plastic and metal. Where was it invented? It was invented in America. When was it invented? It was invented in 1973. 钧姨傅针嘴檄沸披氟胃弊靳信葛矛榔漏诅潜淌河衡攫掷键效沪孰渗娠转捡Unit4Topic1SectionDUnit4Topic1SectionD What method did you use to find your lost cellphone? GPS is like a man-made star. We can use it at any time, in any place and in any weather to find out our position. The early explorers used the stars as landmarks to know where they were and in which direction they were going. This method worked well at night as long as the weather was good. But it didn’t work so well during the rest of the time. Let’s use the GPS. n.探险者， 勘探者 疗诗逆竣咕孜架泣留判焕辞链遁膨掳蛊狐佛颜庆旋伯谩距揩旗篇桓式擎媚Unit4Topic1SectionDUnit4Topic1SectionD 1. How did the early explorers know where they were? They found out where they were by using stars. 2. What’s the disadvantage of using the stars as guiding marks? Its disadvantage is that it didn’t 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 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? … Read the passage and discuss the questions on Page88. 翌祸抠县昌韵默郊童或昧热旬戍芬逐际锤艺辱屿仓应潜阅剖论友格卜燥酪Unit4Topic1SectionDUnit4Topic1SectionD Key words explore explorer, mark find out, in…direction work well, as long as the rest of the time solve, like, use, the shape of great invention n.标示，记号，符号 v.做记号，做标