专题10.7 Unit 4 Topic 1 Section D（课件）-2019-2020学年九年级英语上册同步精品课堂（仁爱版）（共21张PPT）

中物理 仁爱版 英语（初中） 学易同步精品课堂 Unit 4 Amazing Science Topic 1 When was it invented ? Section D Where were we? We can use the compass to find out where we are. 1 课堂导入 The stars in the sky were good guiding marks. We can also use the stars to find out where we are. What can you do if you lose your cellphone? Let’s use the GPS. What is a GPS? 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. Is the GPS useful to us? Yes, it is. explorer /iklplora(r)/ n.探险者，勘探者 mark /ma：(r)k/ n.标示;记号，符号 v.做记号，做标记 system /'sistam/ n.体系，方法，制度 man-made adj.人造的;非天然的 2 课堂活动 New words 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? … Task 1. Read the passage and discuss the questions on Page88. 点击蓝色字体听听力 Task 2. Key Phrases 1.探索我们的世界 2、天空中的星星 3.早期的探险者 4.找到，弄明白 5.在哪个方向 6奏效；可行 7.只要 8.在其余时间里 9.在任何时间 10.在任何地点 11.在任何天气下 12.地球的形状 explore our world the stars in the sky the early explorers find out in which direction work well as long as the rest of the time at any time in any place in any weather the shape of the earth Task 3.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 were, however, this method didn’t work well when the weather was bad. So GPS is a great invention that can help humans to better e________ our