Unit 4 Astronomy_ the science of the stars using language 课件（23张PPT）

课件23张PPT。Unit 4 Astronomy:the science of the starsA Visit to the MoonBook 3Unit 4IIStep 1 Revision Step 2 Lead-in Step 4 Reading Step 6 Discussion Step 7 WritingStep 5 SummaryA visit to the moonStep3 ListeningA quiz on astronomy A quiz on astronomy RevisionStep 1 海王星 Neptune 水星 Mercury 金星 Venus 地球 Earth 火星 Mars 木星 Jupiter 土星 Saturn 天王星 UranusWhy was the earth different from the other planets? Water remained on the earth,which made it possible for life to developspaceship pull float gravity cheer up now that get the hang of break out watch out forn. 宇宙飞船 n. & vt.拉（力）；拖；牵引力 n. & vt.（使）浮动（使）漂浮 n.重力；地心引力 感到高兴；感到振奋 既然 熟悉；掌握；理解 突发；爆发 密切注视；当心；提防 Do you know who he is?Step 2:Lead-in1._____ was the first person landing on the moon? A. Armstrong B. Yang liwei C. Tom Cruise D. Issac Newton 2. When did he land on the moon? A. 1921 B. 1969 C. 1954 D. 1949 3. When did Yang Liwei go to space? Oct,2003 B. Jan,2003 C. Oct,2004 D. Jan,2002 ABA Step3 ListeningListen to the tape and answer the following questions:Reading.mp3 1. How many times would the force of gravity change when they flew to the moon? 2. Was that leaving the moon’s gravity as painful as leaving the earth’s? Why?P30 Fast reading: Read the passage quickly, finish the true or false questions:The spaceship can’t fall back to the earth because it is too far from the earth. ( ) 2. When they were on the moon, they would not feel the gravity because there was no gravity on the moon. ( ) 3. Since the gravity had changed, their walk didn’t need a lot of practice. ( )TFFStep 4Readingvery strongdisappeared weakDetailed reading: Read Para 2 carefully and underline the 3 sentences about the changes of the force of the gravity. (as he left, in space, on the moon) Read Para 3 and fill in the blanks.When we got there, I wanted to _____ immediately. “Come on,” I said. “if you are right, my _____ will be _____ on the earth because the moon is smaller and I will _____ move more _____. I might even grow _____ if I stay here _____”explore weightless thanbe able tofreelytallerlong enoughRead Para 4 : Was their returning painful? What happened to the spaceship?Yes. Fire broke out on the outside of the spaceship.Summary: Last month I visited the moon with my friend. Before we left, I was told the force of g_____ would change three times on our journey. Then we took off. As we left the earth, I became very h_____. Gradually the weight l_____. When I was in space, it d_____. We f_____ weightlessly in the cabin and I c_____ ___. When I was on the moon, I was surprised to find out even walking needs lots of practice n___ ___ gravity changed. The returning of the earth was very f_____. We were amazed to watch fire b____ ____ on the outside of the ship. ravity eavy essened isappeared loated heered up ow that rightening reak outStep 5If you could visit the moon What would you like to take with? Give some examples. What problems might y ... ...