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课件网) Unit 2 We have not found life on any other planets yet. Module 3 Journey to space Earth Mars Moon Lead in What is outer space like Has anyone been to outer space What’s in outer space Now let’s have a look! Lead in the solar system How can we go to outer space By spacecraft Lead in space shuttle astronaut space station How can we go to outer space Lead in Scientists have sent spaceship to Mars. The journey has taken several months. Lead in Astronauts have already been to the moon. Lead in No one has been to Mars yet, because Mars is very far away, much farther than the moon. Lead in Lots of scientists are working hard in order to send astronauts to Mars one day. Lead in 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. Lead in The Earth is a plant and it goes around the sun. Lead in 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. Lead in 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. Lead in There are billions of stars in the Galaxy, and our sun is only one of them. Lead in 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. Lead in Scientists have sent spaceship to the planet Mars to take photos. They have even sent spaceships to travel outside the solar system. Lead in However, no spaceship has travelled far enough to reach other stars in our Galaxy. Lead in Look at the picture and talk about what you know about Chinese spaceships. Shenzhou-9 is a manned spaceship. Work in pairs 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 √ Reading and vocabulary 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. × √ √ Reading and vocabulary 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. √ × × Reading and vocabulary Check (√) the true sentences. Complete the passage with the words and expression in the box. 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 Reading and vocabulary 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 di ... ...
