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课件网) Module 3 Journey to space Unit 2 We have not found life on any other planets yet. 词汇听写 同学们，上一课学习的单词、短语和句型你们都掌握了吗？现在大家来检验一下，点击下面的音频开始听写吧！ 课文导入 How much do you know about other planets 课文呈现 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. 课文呈现 Learning to learn When you read a passage with a title and pictures, think about the words you may find in the passage，and the questions you may want to ask before you start to read. 课文呈现 2. Read the passage and choose the best title for it. 1 Anyone out there 2 Life on the earth 3 The sun and other stars 4 The stars at night _____ Scientists think that there has been life on the earth for hundreds of millions of years. ① However, we have not found life on any other planets yet. Anyone out there 温馨提示：此符号表示“考点精讲点拨”链接。 课文呈现 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. ② The sun and its planets are called the solar system, ③ 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 billions of stars in the Galaxy, and our sun is only one of them. 课文呈现 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. ④ 词汇赏析：阅读第2、3段，只要抓住几个关键词和短语就能很形象地理解太空中“行星———恒星———太阳系———银河系———宇宙”之间的大小或包含关系：1. planet（earth） 2.star（sun） 3. solar system 4. Galaxy 5. universe 课文呈现 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. ⑤ 课文呈现 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 ⑥ We do not know the answers... yet. 句子赏析：文章最后一段通过三个问句质疑太空中是否有其他生命存在，这是科学家们尚未解开的谜题，说明科学探究永无止境，人类太空探索永远在路上。 课文呈现 体裁：说明文 段落之间的逻辑关系：层进结构 Para. 1: life on the earth ↓ Para. 2: the solar system ↓ Para. 3: other galaxies ↓ Para. 4: spaceships to Mars ↓ Para. 5: scientists’ questions 课文呈现 3. Check (√)the true sentences. 1 The earth is a star.□ 2 The sun is a star.□ 3 There is more than one galaxy in the universe.□ 4 The light from the stars in other galaxies has travelled for a long time to reach us.□ 5 Sci ... ...
