9BUnitOneReading预学案.doc

9B Unit One Reading 预学案 陆 云教学目标：1.了解未来在另一个行星上生活的语境。2.识别和理解有关火星生活的词汇。3.识别并列出地球生活与火星生活的不同之处。本课知识背景知识：火星是在太阳系中距离太阳第四远的行星，它表面呈红色，直径约为地球直径的一半。火星完整地绕太阳一周大约需要两年时间。因此，火星上一年是687天。火星有两个卫星火卫一和火卫二。在太阳系中，火星表面与地球表面最为接近。大多数科学家相信火星上没有生命，因为那儿的环境非常恶劣，大气中含有95%的二氧化碳。火星表面的平均温度比地球低30以上，昼夜温差常常超过100。气温和气压过低，使得水无法以液态形式存在。教学过程：A、课前准备1. 下列四会单词会熟练朗读，并能写出中文。 imagine _ planet _ crowded _ polluted _ hopefully_ human_ develop_ sure _ settler _ float _ fashinoable _ various _ compare_ force_ vehicle_ star_ population_ enjoyable_ normal_2. 在书上画出下列短语并翻译。 become more and more crowded large numbers of compare with in many ways in some ways under the control of cmputers3. 理解下列句子。 (1) Many people believe that we will live on the planet Mars by the year 2100. (2) However, nobody is sure if these planets can produce enough water. (3) Many people believe that robots will do most of our work and that we will have more time for our hobbies.4. 把下面的句子换成同义句。（用so that） Our space craft are too slow to carry large numbers of people to Mars. _5. 几分之几在英语中的表达是这样的，分子用基数词，分母用序数词，当分 子大于1，分母用复数。 如：3/8：threeeighths 1/5：onefifth 写出下列的分数表达：二分之一_三分之一_三分之二 _四分之一_四分之三_注意上面有两个词是特殊 的，你知道吗？6. Meals will probably be in the form of pills. and will not be as tasty as they are today. 此句中not as as 表示比较，不如，带可以用not _.as来表达。翻译下面的句子：这本书没有那本书有趣。_ _ _ _ _ _ _ _ _B、课堂活动1. Cheek the exercises2. Read the passage，Do exercises P11 C3. Work in pairs. finish P10 B14. Do P10 B25. 活动 (1)从C2部分的列表中挑出认为最重要的一点，可以是优点，也可以是缺点，轮流说出来，用下列结构。 I like / dont like living on Earth because Id like / wouldnt like to live on Mars because (2)思考在火星上和地球上生活的优势和劣势Advantages of life on MarsDisadvantages of life on MarsNot crowded / pollutedNo traffic jamsPeople will wear fashionable bootsPeople will have more spaceRobots will do our workWe will have more time for hobbiesStudents will study at homeLow gravity will be dangerousFood is not as fresh as that on EarthTravel will make people feel sickToo cold to go outsideFar away from friends on EarthFood does not taste good Advantages of life on MarsDisadvantages of life on EarthFood is tasty and freshTravel is comfortableWe can breathe the airWe can go to theatres concerts. etcCrowded / pollutedNot much spaceNoisyNot very exciting or unusualWars6. 练习:判断正误 (1) By 2100, people might live on Mars. ( ) (2) Mars is becoming crowded and polluted.( ) (3) Now, it takes months for a space craft to travel from Earth to Mars.( ) (4) Plants can produce exygen that humans need. ( ) (5) Mars has three times the gravity of Earth. ( )(6) Peop