LESSON Eight Man-made Satellites Period Three 课件.ppt

Lesson EightMan-made SatellitesPeriod Three 平湖职业中专 吴美华 二00三 年 六 月 十一日 Teaching Aims and Requirements 1.Review the words learned . 2.Teach the text . 3.Cultivate the ability to look on things correctly. Teaching Importmant Points:Understanding of the text. Teaching Difficult Points: 1. Some language points. 2.The grammar. Teaching Contents and Procedures: Step one : Review the words and expressions. Pay attention to some important words such as send up, station on earth, direct,relay,some kind of information, be different from Step Two: Listen to the tape-recorder. Step Three: 简介 ——人造卫星 ??? 1958年1月31日，美国第一颗人造地球卫星“探险者—1”升空。此后，法国、日本、中国和英国等纷纷发射各自的卫星。 据统计，现在已研制和发射了各种人造卫星4800多颗 Our man-made satellites ????中国是第五个能独立发射卫星的国家。1970年4月24日，我国用自制“长征—1”运载火箭，成功地发射了第一颗人造地球卫星——“东方红”1号. ???? 近年来，我国用长征三号火箭先后发射了1颗试验卫星、5颗东方红二号系列通信卫星、2颗风云二号气象卫星、用长征三号甲火箭发射了1颗实践四号探测卫星、2两颗东方红三号通信卫星、1颗中星22号通信卫星，这些卫星中有10颗进入静止轨道预定位置。 气象卫星和通讯卫星 卫星观测天体不受大气层的阻挡，实现全波段天文观测，飞行速度快，可迅速获取地球的大量信息。不受领土、领空、地理和气候条件限制，视野广阔，一张照片拍摄的面积可达几万平方千米。卫星可“看到”40％的地表，对通信非常有利，可实现全球范围的信息传递和交换。 军用卫星 定语从句----the attributive clauses So now thousands of these man-made objects, which are of different shapes and sizes, travel around the earth. Satellites also send radio signals that direct ships and planes through all kinds of weather. In 1962, the United States launched the first satellite, which relayed TV programs between the United States and Europe. Answer these questions: 1) What does the writer talk about in this text? He talks about man-made satellites. 2) Do you know man-made satellites? Yes, I know something about them. 3) How many man-made satellites are there in space now? There are thousands of man-made satellites in space now. 4) They don`t travel around the earth,do they? Yes, they do. 5) What do you know about the size of the man-made satellites? I know some of these are not as big as a hand;ot