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人教高中英语必修三Unit4Reading课件

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    • 1、Module III Unit 4,Astronomy,Whats the meaning of the word “Astronomy”?,I. Warming up,the science of stars; the scientific study of stars and planets.,2. What words will you think of when we talk about this topic?,star, planet, the sun / moon / earth, solar system,恒星 行星 太阳 月球 地球 太阳系,3. How many planets are in the solar system?,8,Pluto,Scientists now think Pluto is too small to be called a planet.,The Solar System,1111,5. The names of eight planets.,Mercury Venus Earth Mars Jupiter Saturn Uranus N

      2、eptune,1) 水星 2) 金星 3) 地球 4) 火星 5) 木星 6) 土星 7) 天王星 8) 海王星,商业之神和旅行之神,爱与美之神,该亚女神(大地、土壤等),战神,天神,农业之神,宇宙之神,海神,Mercury,Venus,Earth,Mars,Jupiter,Uranus,Saturn,Neptune,6. Put them in correct order on P25.,Do you know their origin?,II. Pre-reading,Have you ever asked your mother, “Mom, where do I come from”?,2. Nearly everybody has this or that puzzles: How do human beings come into being? How does the earth come into being?,3. In China, there are two legends about these puzzles. Do you know the names?,盘

      3、古开天辟地 女娲补天造人,4. In the western culture, who creates everything in the world?,The God,III. Fast-reading,Do you believe in such stories? Are they based on science?,2. In this unit, well learn something more scientific. 3. Whats the title of the text?,4. From the title, we can predict that the text may tell us the origin of life on the earth.,How life began on the earth,D. A widely accepted theory about the formation of the universe,C. The formation of the earth,A. The importance of water for life,

      4、B. The development of plants and animals on the earth,E.The arrival of humans and their impact on the earth,Read quickly and match the main idea of each paragraph,Detailed reading This text can mainly divided into two stages,Stage 1 : The development of the earth Stage 2 : The development of life,(para 13),(para 45),Stage 1: The development of the earth,(1) After the Big Bang, what was the earth like?,a cloud of dust,a solid globe,exploded with fire and rock,produced water vapour and gases,(2) W

      5、hat happened next?,(3) What did the water vapour and gases form?,the earths atmosphere,Water appeared,(4) What appeared as the earth cooled down?,water is important for the beginning of life on the earth.,Why is water so important for the beginning of life? Because water allowed the earth to dissolve harmful gases into oceans and seas.,?,Stage2 The development of life,small plants appears in water,1.What life developed after water appeared?,Shellfish and all sorts of fish,2.What life developed i

      6、n water next?,green plants began to grow on land,insects appeared,3.What about the life on land?,amphibians on land and in the water,forests,4. What life developed next on land?,reptiles appeared,dinosaur developed,5.What life developed after forests appeared?,mammals on land,6.What life developed after dinosaurs?,small clever animals,7. What life developed after mammals?,1.Who are the small clever animals with hands and feet? 2. Are they taking care of the earth well? Why?,?,Because they are pu

      7、tting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.,The earth may become too hot to live on .,The earth is becoming hotter and hotter!,Can you fill in the blanks?,2,3,4 5,6,7 8 9 10,1 small plants in water,shellfish and all sorts of fish,insects,reptiles,amphibians,mammals,dinosaurs,humans,plants,animals,Green plants on land,forests,1. Insects and amphibians appeared. 3. The earth became a solid ball. 5. Reptiles appeared. 7. The earth

      8、was a cloud of dust 9. Shellfish and other fish appeared. 11. Clever animals with hands and feet appeared,2. Dinosaurs appeared. 4.Small plants grew on the water. 6. Plants began to grow on dry land. 8. Water appeared on the earth 10. The universe began with a “Big Band”. 12. Mammals appeared.,8,3,10,9,11,5,1,7,4,12,6,2,Can you put the order of development of life into a time line?,Ex.2 on P27,summary,After the “big bang”, the earth was still just a cloud of _,it _loudly with fire and rock, whic

      9、h were _ to produce the_, water vapour and other gases. Then _ began to appeared on the earth.,dust,exploded,in time,carbon dioxide,water,_ in water are considered to be the earliest lives on the earth. The O2 they supplied encouraged the lives of_ _. Slowly _ grew on land, which were followed by _ like insects & _. When the plants grew into_, _ appeared. Then _ developed but disappeared later, which made the rise of a totally different animal,_, possible, and finally _ spread all over the world.,shell-,-fish and fish,amphibians,forests,reptiles,dinosaurs,mammal,humans,The small plants,land animals,green plants,1. Finish the exercise 1and 2 on page 63 2. Read the text again and find out your difficult points.,Homework:,

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