外研版八年级下册英语课件-Module 3 Journey to space-Unit 2

外研版八年级下册英语课件-Module 3 Journey to space-Unit 2

earth moon spaceship astronaut space travel Scientists have sent spaceship to Mars. The journey has taken several months. Astronauts have already been to the moon. No one has been to Mars yet, because Mars is very far away, much farther than the moon. Lots of scientists are working hard in order to send astronauts to Mars one day. Scientists think that there has been life on the Earth for hundreds of millions of years. However, we have not found life on any other plants yet. The Earth is a plant 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 billions of 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 spaceship 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. Look at the picture and talk about what you know about Chinese spaceships. Shenzhou-9 is a manned spaceship. 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 √ 1. The earth is a star. 2. The sun is a star. 3. There is more than one galaxy in the universe. Check (√) the true sentences. × √ √ 4. The light from the stars in other galaxies has travelled for a long time to reach us. 5. Scientists have received many messages from space. 6. Spaceships have visited most of the universe. √ × × Complete the passage with the words and expression in the box. communicate environment none solar system universe Is there life on other planets? There are seven other planets in our (1) ____________, but (2)______ of them has a(n) (3)____________ like that of the earth. solar system none environment Spaceships from the earth have done surveys of the other planets, but they have not found any life there. Why has no one from other planets tried to (4) _____________ with us? It is true that scientists have not discovered life on other planets in the (5)_________ yet, but some scientists believe that they will find it some day. communicate universe 1. Scientists think that there has been life on the Earth for hundreds of millions of years. 科学家认为地球上的生命已经有亿万年 了。 millions of 数百万 hundreds of 数百 thousands of 成千上万 billions of 数十亿 e.g. There are billions of stars in the Galaxy, and our sun is only one of them. 银河系中有数十亿颗恒星，我们的太阳 只是其中的一个。 2. However, we have not found life on any other planets yet. 然而，我们还没有在任何其他行星上发 现生命。 yet 用于否定句和疑问句，意思是“还， 尚”。not … yet 的意思是“还没，尚 未”，表示某事物在某一时间尚未发生， 但未来也许会发生。例如： I haven’t learnt any farther information yet. 我还没有得到进一步的信息。 Have you received her letter yet? 你收到她的来信了吗？ 3. The Earth is a planet and it goes around the sun. Seven other planets also go around the sun. 地球是颗行星，它围绕着太阳转。此外 还有七颗行星也围绕着太阳转。 太阳系的其他七颗行星：水星 (Mercury)、金星(Venus)、火星(Mars)、 木星(Jupiter)、土星(Saturn)、天王星 (Uranus)、海王星(Neptune)。 4. None of them has an environment like that of the earth, so scientists do not think they will find life on them. 他们中没有一个有像地球这样的环境，因 此科学家们认为在他们上面找不到生命。 none of … 表示（三个以上）一个也没 有。做主语时，谓语动词可用单数或复 数。 e.g. None of us has/have been to the Mars. 我们中没一个去过火星。 5. … our solar system is a small part of a much larger group of stars and planets, called the Galaxy or the Milky Way. ...... 我们的太阳系只是一个由恒星和行 星组成的星系的一小部分，这个星系比太 阳系大得多，称作银河系或银河。 这里的the Galaxy专指“银河系”，也 可以称作 the Milky Way。而galaxy则 泛指“星系”。 e.g. Scientists have discovered a distant galaxy. 科学家们发现了一个遥远的星系。 6. So how large is the universe? It’s impossible to imagine. 所以宇宙有多大？我们无从想象。 句型: It is + 形容词 + to + 动词原形， 意思是“做某事很……” e.g. It is difficult to read these words. 读这些单词很难。 7. With so many stars in the universe, are we alone, or is there life out there in space? 宇宙中有这么多星球，我们是孤独的吗？ 或者太空中还有其他生命存在呢？ with + 名词 + 介词短语，表示伴随情 况，意思是“带着……”。 e.g. Mr. Zhang is coming with a book in his hands. 张老师手里带着一书进来了。 alone 在句中作形容词，不作定语只做 表语，也可作副词。意思是“独自地”。 e.g. She was alone in that dark room. 她独自一人呆在那黑屋子里。 Look at the picture from a science story for children and answer the questions. What have the scientists just received? (a message from one of our spaceships) They have just received a message from one of our spaceships. 1. Where has the spaceship landed? (Mars) It has landed on Mars. 2. What has the spaceship discovered? (people on Mars) 3. Why have the people on Mars not sent us a message? (do not know how to) It has discovered people on Mars. We do not know how to send us a message. 4. Why have the people on Mars not visited us on the earth? (do not know how to) We do not know how to visit us on the earth. Write a passage to describe the picture. Use your answers to the questions in Activity 5 to help you. We have just received a message from our spaceship to Mars … _________________________________ _________________________________ _________________________________ _________________________________ 1. — Where’s Mr Green? — He _____ to Changsha. (2013湖南湘西) A. have been B. has gone C. has been 2. — Is Tom at home? — No, he______ to town. (2013天津) A. has been B. has gone C. goes D. will go 3. He promised to pick me up at the school gate. However, he _______ yet. (2011安徽) A. didn’t arrive B. doesn’t arrive C. isn’t arriving D. hasn’t arrived 4. — What is the weather like this summer here? — There ____ very little rain. (2011广州) A. has B. has been C. are D. have been 5. A number of tourists ______ Yangzhou many times because it is such a beautiful city. (2013扬州) A. have been to B. has been to C. has gone to D. have gone to