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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,*,Unit 4,Astronomy,:the,science,of,the,stars,Unit 4,八大行星,你知道吗？,八大行星你知道吗？,(,水星）,（金星）,（火星）,(,木星,),(,天王星）,(,土星,),(,海王星）,（地球）,(水星）（金星）（火星）(木星)(天王星）(土星)(海王星）,Do you know any,ancient,idea,about the beginning of the earth?,Do you know any ancient,Pangu,separates,the sky,from,the earth,Pangu separates the sky from t,Nvwa makes,human beings,Nvwa makes human beings,Unit 4,How Life Began on the Earth,Unit 4How Life Began on the Ea,Fast reading:Skim the passage and match the main idea with each paragraph.,Para.1 A.The formation(,形成,)of the earth,.,Para.2 B.The importance of water for life,.,Para.3 C.A widely accepted theory the Big,Bang,Para.4 D.The arrival of humans and their,impact(,影响,)on the earth.,Para.5 E.The development of plants and animals on the earth.,Fast reading:Skim the passage,The universe began with a“Big Bang”that threw matter in all directions.,th,Para 1 What is the widely accepted theory?,The universe began with a“Bi,1.When did the“Big Bang”happen?,It happened several billion years ago.,Para2-3.the earth and water came into being,1.When did the“Big Bang”hap,2.What form was the earth after the“Big Bang”?,The earth was still just a cloud of dust.,3.What made up the earths atmosphere after the earth exploded?,Carbon,nitrogen,water vapour and other gases.,2.What form was the earth aft,4.How did water come into being on the earth?,As the earth cooled down after it exploded,water came into being.,4.How did water come into bei,5.Whats the significance of the presence of water on the earth?,It allowed the earth to dissolve harmful gases and acids into the oceans and seas.,5.Whats the significance of,1.,Small plants in water,2,.,_,and all sorts of fish,3,.,Green,_,on land,4.,_,(on land),5.,Amphibians(on land and in,_,),6,.,Plants grew into,_,.,8,.,_,(on land),9.,_,(on land),Para4 the development of life,7.,_,(on land),10.,_,(small clever animals on land),Shellfish,Insects,water,plants,forests,Reptiles,Dinosaurs,Mammals,Human beings,1.Small plants in wat,Para5.What problem is caused by human beings?,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.,Para5.What problem is caused b,Homework,Read the text and try to retell how life began,on the earth.,Homework,
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