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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,Hangzhou Foreign Languages School,Bao Xiaoming seagreatbao,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,人教版必修,3,Unit 4 Astronomy: the science of the stars,How Life Began on the Earth,reading,Pangu separates the sky from the earth,The Goddess Nuwa mended the heaven and created human beings,from the clay(粘土).,God created the world in seven days,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) What 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 in 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 putting 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 .,Can you fill in the blanks,2,3,4,5,6,7,8,9,10,1,small plants in water,sellfish 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 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,Group work : describe the video,The earth is becoming hotter and hotter,Discussion,What can we do to prevent the earth,from becoming hotter and hotter,Eg. What we can do is to save energy.,What we can do is to,summary,After the “big bang, the earth was still just a cloud of _,it _loudly with fire and rock, which were _ to produce the_, water vapour and other gases. Then _ began to appeared on the earth.,dust,exploded,in time,carbon,water,_ in water are considered to be the earliest lives on the earth. The O,2,they supplied encouraged the lives of_. Slowly,green plants,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,1.,Finish the exercise 1and 2 on page 63,2. Read the text again and find out your difficult points.,Homework:,1. How was the earth different from the other planets,Comprehension questions,2. What made it possible for life to begin to develop,Comprehension questions,3. What are the differences between reptiles and mammals,Comprehension questions,4. How did dinosaurs disappear,Comprehension questions,
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