Module 3 Unit2 课件2022-2023学年外研版英语 八年级下册

中国航天全纪录 Module3 Unit 2 We have not found life on any other planets yet. Learning aims （学习目标） 1. To master the key words and expressions. 掌握重点单词和词组。 2. To understand and use Present Perfect better. 更好地理解并使用现在完成时。 3. To do further thinking and writing about the topic. 对有关话题进行拓展性思考和写作。 水星 金星 火星 木星 土星 天王星 海王星 Do you know them? planets 行星 star 恒星 The sun and its planets are called _____________ the solar system 太阳系 Our solar system is a small part of ________________________银河系. the Galaxy / the Milky Way There are many ________（星系）in the_________（宇宙） galaxies universe Put them in order: small — large. galaxy planet solar system universe 行星 太阳系 星系 宇宙 So how large is the universe? 导入一 Read the passage quickly and match : Para. 1 ___________Para. 2& 3 ____________ Para. 4 ___________Para. 5 _____________ The scientists’ progress (进程) B. The scientists’ questions C. The solar system and the universe D. The life on earth and other planets A B C D Reading tip1: key words Learning guidance 1 Careful reading: Para1 1.How many years has there been life on the earth? Hundreds of millions of years. A. 百万年 B. 千万年 C. 亿万年 2. However, we have not found life on any other planets yet. (Read Para2 and answer) Because none of them has an environment like that of the earth. So_________________________________ _______________________________. scientists do not think (they will find life on the other planets) That’s why Learning guidance 2 The earth is a ______ . Eight planets goes around the _____. The sun and its eight planets are called ________________ . Our galaxy is called__________________ . there are billions of ______in the Galaxy. stars the solar system the Galaxy or the Milky Way planet sun Para.2 & first sentence in Para.3 数十亿颗恒星 Our sun is only one of the stars. star planets ( go around) the solar system the Milky Way galaxy Retell planet ( go around) universe ? The stars look small. They are far away. Light ye