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,*,Unit 4,Astronomy:,the science of the stars,Unit 4,Pre-reading,Do you know how our life began on the earth?Do you know any ancient idea about the beginning of the universe?,Pre-readingDo you know how our,盘古开天辟地 女娲补天造人,In the western culture,who creates everything in the world?,The God,盘古开天辟地 女娲补,HOW LIFE BEGAN ON THE EARTH?,Reading,HOW LIFE BEGAN ON THE EARTH?Re,Scanning,1.What is the main idea of the text?,2.Which paragraph 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?,Para.4,Para.2,Para.3,Para.5,Para.1,How life began on the earth,Scanning1.What is the main id,Passage structure,Main body,Para 1:,Para 2:,Para 3:,Para 4:,Para 5:,A widely accepted theory about,the formation of the universe.,The formation of the earth.,The importance of water for life.,The development of plants and animals on the earth.,The arrival of humans and their impact on the earth.,Read the passage carefully and analyse its structure:,earth,atmosphere and water,life development,Human beings,Carefully Reading,Passage structureMain bodyPara,（）,A Insects and amphibians appeared.,（）,B Dinosaurs appeared.,（）,C The earth became a solid ball.,（）,D Small plants grew on the water.,（）,E Reptiles appeared.,（）,F Plants began to grow on dry land.,（）,G The earth was a cloud of dust.,（）,H Water appeared on the earth.,（,Shellfish and other fish appeared.,（）,J The universe began with a“Big Bang”.,（）,K Clever animals with hands and feet appeared.,（）,L Mammals ap,p,eared.,5,10,6,）,2,9,4,8,3,7,1,Detailed reading,Put the order of development of life into a time line.,12,11,（）A Insects and amphibians a,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?,3.What problem is caused by human beings?,After reading the passage,dis,2.Why is it wrong to show films with dinosaurs and people together?,1.Why was the earth different from the other planets?,Because the water remained on the earth.,Because dinosaurs died out long before human beings developed on the earth.,3.What problem is caused by human beings?,Human beings causes global warming.,2.Why is it wrong to show fil,After the“Big Bang”,the earth was full of water.,After the“Big Bang”,the eart,Original cells appeared in the ocean.,Original cells appeared in the,The cells in the water began to separate.Marine animals came into being.,The cells in the water began t,Some animals(amphibian&insects)came to land.,Some animals(amphibian&inse,Reptile appeared.,Reptile appeared.,dinosaurs,dinosaurs,Mammals,Mammals,Man had evolved from apes.,Man had evolved from apes.,They developed new methods of growing food,hunting and moving around.As time went by they covered the earth and have become the most important animals on the planet.,They developed new methods of,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.,_ in water are considered to be the earliest lives on the earth.The O2 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.,dust,exploded,in time,carbon,water,summary,The small plants,shell-fish and fish,land animals,amphibians,forests,reptiles,dinosaurs,mammal,humans,After the“big bang”,the eart,As a student,what little things can we do for the earth?,Discussion,As a student,what little thin,solar energy,plant trees,recycle rubbish,prevent desertification,save water,purify air,solar energy plant trees recy,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,Design an activity on Earth Da,Homework,Search the Internet for the information of the development of life.,2.Read the text again and find out your difficult points.,Homework,Thanks！,Thanks！,