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人教新课标必修三 Unit4  Astronomy period 1 学案设计

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        Unit 4 Astronomy:the science of the stars
                      Period 1 文本研读课

                                  学习目标
    1.Understand the theory about the origin of the universe and life on the earth—the “Big 
Bang” theory.
    2.Learn to concern about the future of life on the earth.
                                  思考导引
    How the universe began.
                                  课堂探究
    1.Skimming
    What is the main idea of the text?
    2.Scanning 
    Which paragraphs are the questions mentioned in?
    (1)How old is the earth?
    (2)How does the universe begin?
    (3)Is there any water in the Mars?
    (4)When did dinosaurs disappear?
    (5)Which animal is the most important one on the earth?
    3.Intensive reading
    Task 1 Read the passage carefully and analyse its structure.
             𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ1:
             𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ2:
             𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ3:
             𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ4:
             𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ5 
    Main Body          :
    Task 2 Put the order of development of life into a timeline.
    (  )1 Insects and amphibians appeared.
    (  )2 Dinosaurs appeared.
    (  )3 The earth became a solid ball.
    (  )4 Small plants grew on the water.
    (  )5 Reptiles appeared.
    (  )6 Plants began to grow on dry land.
    (  )7 The earth was a cloud of dust.
    (  )8 Water appeared on the earth.
    (  )9 Shellfish and other fish appeared.
    (  )10 The universe began with a “Big Bang”.
    (  )11 Clever animals with hands and feet appeared.
    (  )12 Mammals appeared.
    Task 3 After reading the passage,discuss the following questions.
    1.Why was the earth different from the other planets?
                                                                             
    2.Why is it wrong to show films with dinosaurs and people together?
                 中国现代教育网      www.30edu.com  全国最大教师交流平台

                                                                             
    3.What problem is caused by human beings?
                                                                             
                                  课堂提升
    Summary
    After the “Big Bang”,the earth was still just a cloud of     .It     loudly with fire 
and rock,which were      to produce     ,nitrogen,water vapour and other gases.Then      
began to appear on its surface. 
       which grew on the water are considered to be the earliest lives on the earth.The oxygen 
they supplied encouraged the lives of     .Slowly green plants grew on land,which were 
followed by          like insects and     .When   the plants grew into     ,     
appeared.Then         developed but disappeared later,which made the rise of a totally 
different kind of animal,    ,possible,and finally      spread all over the world. 
    Discussion 
    1.Do we human beings look after the earth well?What problems have been caused by human 
beings to the earth?
    2.As a student,what little things can we do for the earth?Design an activity on Earth Day.
    ◆What the activity is about 
    ◆Why the activity is designed
    ◆When and where to do the activity 
    ◆Who takes part in the activity
    ◆What to be done in the activity
    ◆...
                                  课后作业
    1.Search the Internet for the information of the development of life.
    2.Read the text again and find out your difficult points.

     参考答案

    课堂探究
    1.Skimming
    How life began on the earth.
    2.Scanning
    (1)Para.2 (2)Para.1 (3)Para.3 (4)Para.4 (5)Para.5
    3.Intensive reading
    Task 1
                 𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ1: 𝐴𝑤𝑖𝑑𝑒𝑙𝑦𝑎𝑐𝑐𝑒𝑝𝑡𝑒𝑑𝑡ℎ𝑒𝑜𝑟𝑦𝑎𝑏𝑜𝑢𝑡𝑡ℎ𝑒𝑜𝑟𝑖𝑔𝑖𝑛𝑜𝑓𝑡ℎ𝑒𝑢𝑛𝑖𝑣𝑒𝑟𝑠𝑒.
                            𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ2: 𝑇ℎ𝑒𝑓𝑜𝑟𝑚𝑎𝑡𝑖𝑜𝑛𝑜𝑓𝑡ℎ𝑒𝑒𝑎𝑟𝑡ℎ.
                          𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ3: 𝑇ℎ𝑒𝑖𝑚𝑝𝑜𝑟𝑡𝑎𝑛𝑐𝑒𝑜𝑓𝑤𝑎𝑡𝑒𝑟𝑓𝑜𝑟𝑙𝑖𝑓𝑒.
                   𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ4:𝑇ℎ𝑒𝑑𝑒𝑣𝑒𝑙𝑜𝑝𝑚𝑒𝑛𝑡𝑜𝑓𝑝𝑙𝑎𝑛𝑡𝑠𝑎𝑛𝑑𝑎𝑛𝑖𝑚𝑎𝑙𝑠𝑜𝑛𝑡ℎ𝑒𝑒𝑎𝑟𝑡ℎ.
             𝑃𝑎𝑟𝑎𝑔𝑟𝑎𝑝ℎ5: 𝑇ℎ𝑒𝑎𝑟𝑟𝑖𝑣𝑎𝑙𝑜𝑓ℎ𝑢𝑚𝑎𝑛𝑏𝑒𝑖𝑛𝑔𝑠𝑎𝑛𝑑𝑡ℎ𝑒𝑖𝑟𝑖𝑛𝑓𝑙𝑢𝑒𝑛𝑐𝑒/𝑒𝑓𝑓𝑒𝑐𝑡/𝑖𝑚𝑝𝑎𝑐𝑡𝑜𝑛
                                        𝑡ℎ𝑒𝑒𝑎𝑟𝑡ℎ                     
    Main Body                                   .

    Task 2
    8,10,3,5,9,7,2,4,6,1,12,11
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    Task 3
    1.Because the water remained on the earth.
    2.Because dinosaurs died out long before human beings developed on the earth.
    3.Human beings cause global warming.
    课堂提升
    Summary
    dust;exploded;in time;carbon dioxide;water;The small plants;shell fish and all sorts of 
fish;land animals;amphibians;forests;reptiles;dinosaurs;mammals;human beings
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