仁爱九年级Unit-4-Topic-1-Section-D.pptVIP

Unit 4 Amazing Science Topic 1 When was it invented ? Section D 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. 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. 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. 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? … 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 Functions Project (1) This is Kangkang’s invention. Look at the information and the picture. What do you think of it ? Discuss with your partners. 2. Design your own invention. Draw a picture of it and write down the information about it. We Learn: 1. Some words : mark, explorer 2. Some phrases: find out, in …, direction, as long as, work well, the rest of the time, be used to, the sha