Unit 4 Astronomy the science of the stars 教案2.doc

Unit 4 Astronomy : the science of the stars 教案2(A VISIT TO THE MOON)IntroductionYou are advised to lead in by talking about Tibet which is a wonder for a travel trip. Then help students with their reading of Journey down the Mekong. Translation of the text into Chinese is proposed. Objectivesn to write an essay to show your problems and the way to overcome themProceduresI. Warming up Let 2-3 students retell the passage learned in the first two periods. Revise some important words and statements.Remind the students of October 15th 2003 when Yang Liwei went up into space. (showing pictures or Videos in possible)List the following questions before listening:l What education and experience do you need to become an astronaut?l Do you think there are any special requirements?l What kind of a person makes a good astronaut?l What problems do you think he/she would have in space?(Students report back to the class in fours)II. Listening (P62)Listen to parts 1 and 2. Write down the main idea.Then listen to part 1 finish exercise 3 and part 2 to finish exercise 4.Questions Yang Liweis answers When was the most exciting moment?What surprised him?What did he do? When his spaceship lifted off the ground he knew he was really on his way into space.The beauty of spaceHe watched all his instruments and stayed calm.Information on Yang Liwei, the astronautEducationHe got his degree.TrainingHe trained for ten years to fly airplanes and then to fly a spaceship.Physical qualities Smaller than 170 cm; less than 70 kg.Personal qualitiesCalm, hard-workingListen again (if necessary) and fill in the blanks in exercise 5.III. TalkingThis task asks the students to work in pairs and give a friend a number of “dos and donts about going into space.Remind the students of having discussed some problems before reading A VISIT TO THE MOON. Brainstorm a list based on what they remember in pairs.Compare the ideas with another pair and make a report to the class.Make suggestions either to avoid or to solve the problems listed in groups of four.Give some Sample dialogues:IV. Speaking taskThe purpose of this task is to use the information gained from the listening text and reading passage in a new situation.Before the task, work out some questions to ask. For example:l What was the most unexpected thing you found out about black holes?l If you cannot see a black hole, how do you know you have got close to it?l What was the most frightening thing that happened to you on this journey?Prepare the answers to the questions in pairs.Suggested answers to the questions above:l Most unexpected thing: the black hole threw out material as well as swallowing objects.l Knowing when we reached it : You only know you are close to a black hole by seeing things going around what appears to be an empty space. The black hole cannot be seen.l Most frightening experience: when the gravity of the black hole was pulling us slowly into its mouth, and then the spaceship moved around the hole; I was terrified because I thought we would be swallowed by the hole.Practice the interview in front of the class in pairs.V. Reading This reading uses information from the listening text above. It is a science fiction story which imagines what it might be like if an astronaut visited the Moon.Read the passage carefully and then describe the three ways in which gravity changed for Li Yanping and how his weight changed.Suggested sentences: 1. The pull of gravity became very strong as he left the earths atmosphere. His weight is normal.2. It disappeared when he was in space. He is weightless.3. It was very light when he was on the moon. He weighs less than on the earth.VI. Reading Task Remind the students of the knowledge of black holes.Read the passage to discover the new ideas about black holes .Old ideas about black holesWas this what we found?New ideas about black holesBlack holes cannot be seenYesYou can only see it by watching the movements of the objects caught by its gravity.Gravity pulls objects towards them.YesObjects go round outside the edge of the black hole.YesAll objects must go into the black hole when they are caught by its gravityNoThey can be thrown far from the black hole by its energy.VII. Writing task The purpose of this writing task is for the students to us