(
课件网) Module 3 Unit 2 We have not found life on any other planet yet. 学习目标 重点探究 自主学习 学习导航 当堂检测 课堂总结 拓展提升 新课导入 outer space 新课导入 Yuri Gagarin, Soviet Union 12 April, 1961 新课导入 1968 年12月27日, 阿波罗8号———第一次载人的月球行动，在完成了历时六天的历史性航行之后，安全返回地球。 新课导入 爱德温·艾尔德林 环绕地球飞行的宇航员每“天”可以看见16次日出和16次日落。 新课导入 1986年1月28日, “挑战者”号航天飞机在肯尼迪航天中心发射升空不久后爆炸。 学习目标 1.能记住并能正确运用下列单词和词组: none,environment, that, solar, system, group, galaxy,universe,light,impossible,out,communicate,solar system 2.能熟练地运用现在完成时来描述宇宙中太阳系的知识和人类对宇宙的探索 自主学习 New words and expressions none environment that solar system solar system group galaxy pron.没有一人；没有一个 n. 环境 pron.那，那个（指代已被提及的事物） adj.太阳的；与太阳有关的 n.系统；体系 星系；（犹指）太阳系 n.群；组 n.星系 自主学习 New words and expressions universe light impossible out communicate n.宇宙 n.光；光线；光亮 adj.（事情）办不到的，不可能的 adv.在远方 v.联系；交流 重点探究 Reading and vocabulary 1.Work in pairs. Look at the picture and talk about what you know about Chinese spaceships. Shenzhou-9 is a manned spaceship. ——— Scientist think that there has been life on the earth for hundreds of millions of years.However,we have not found life on any other planets yet. The earth is a planet and it goes around the sun.Seven other planets also go around the sun.None of them has an environment like that of the earth,so scientists do not think they will find life on them.The sun and its planets are called the solar system,and our solar system is a small part of a much larger group of stars and planets,called the Galaxy or the Milky Way.There are billionsof stars in the Galaxy, and our sun is only one of them. Scientists have also discovered many other galaxies in the universe.They are very far away and their light has to travel for many years to reach us.So how large is the universe It is impossible to imagine. Scientists have sent spaceships to the planet Mars to take photos.They have even sent spaceships to travel outside the solar system.However,no spaceship has travelled far enough to reach other stars in our Galaxy. Scientists have always asked the questions:with so many stars in the universe,are we alone,or is there life out there in space Have there been visitors to the earth from other planets Why has no one communicated with us We do not know the answers...yet. 2.Read the passage and choose the best title for it. Match the titles with the paragraphs: Are we alone B. Life on the earth. C. Solar system is a small part in the galaxy. D. Spaceships haven’t travelled far enough. E. Universe is really large. 1 2 4 5 3 The earth is a star. The sun is a star. There is more than one galaxy in the universe. 3.Read the passage and check the true sentences. √ √ 4. The light from ... ...
