Unit 8 Lesson 22（课件）英语北师大版九年级全册

Unit 8 Lesson 22 1、发现、归纳if 条件状语从句的语意功能 。 2、通过习题的操练 ,正确运用主句和从句的时态。 3、通过对灾难的应急措施的表达 ,正确恰当的使用if条件状语从句。 4、培养学生在遇到突发紧急事件时,自救和帮助他人的意识。 教学目标 Have you seen this picture? What’s this? Warm-up NASA on 23rd, July announced the discovery of Kepler-452b, the most Earth-like planet ever found. Located 1,400 light-years from our planet, NASA called it “Earth 2.0”, because it’s the first planet discovered in the habitable zone of a G star similar to our sun. 7月23日,美国国家航空航天局(简称为NASA)宣布发现开普勒-452b,是迄今为止与地球最为相近的行星。该行星距离地球1400光年,NASA将其命名为“地球2.0”,因为它是第一颗人类在宜居带里与太阳相似的恒星附近发现的行星。 1.与太阳相似的恒星被发现 这颗系外行星编号Kepler 452b,其直径约为地球的1.6倍,与恒星之间的距离与日-地距离相近。恒星Kepler 452距离地球大约430秒差距(约合1400光年),位于天鹅座。 天文学家称,这是至今为止发现的最接近地球的“孪生星球”,跟地球的相似指数为0.98,并且有可能拥有大气层和流动水。 NASA说这个星球上可能有活火山,有存在生命的可能性,行星应该有60亿年历史,地球为45亿年。 An international team of scientists said they have discovered the farthest galaxy ever measured in the universe. By using a powerful instrument called MOSFIRE on the Keck I telescope at the Keck Observatory in Hawaii, the team thought that the galaxy, EGS-zs8-1, formed more than 13 billion years ago at a time when the universe was only five percent of its present age. 科学家使用位于夏威夷的凯克天文台的望远镜发现了新星系,并将这个星系命名为EGS-zs8-1。它是迄今发现的最遥远星系,打破了此前的观测纪录。 2.宇宙中最遥远星系被发现 “…you may not have more than twelve months to live.” How would you feel? Stephen Hawking “…not expect to survive that long….engaged…” paragraph 2 paragraph 3 universe …time…? …universe …begin? …black holes…? black holes paragraph 4 A Brief History of Time paragraph 5 science Misunderstandings… Careful Reading Read the text again and answer the following questions 1. How would most people feel when they were told that they had an incurable disease? 2. What did Hawking do when he was told so? 3. For what did Hawking become famous in the 1970s? 4. What did Hawking explain in the book A Brief His- tory of Time? They will probably feel very sad and give up their dreams and hopes for the future. Instead of giving up, he went on with his research, got his PhD and ma