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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,*,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,*,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,*,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,*,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,*,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,*,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,*,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,*,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,*,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,*,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,Warming up,medicine,biology chemistry,astronomy,physics mathematics,Warming upmedicine,geophysics,geology physics,biochemistry,biology chemistry,geophysicsbiochemistry,Astronomy,is the scientific study of the,universe,and the heaven bodies(such as the sun,the moon,and stars),gas,and dust within it.,astronomer,Astronomy is the scientific st,Solar system,Solar system,1.Do you know how did the universe begin?,1.Do you know how did the univ,Each religion or culture has its own ideas about the beginning of the universe?,Pre-reading,Pangu separates the sky from the earth.,Each religion or culture has i,Pangu separates the sky from the earth,Pangu separates the sky from t,Pangu separated the earth and sky with an ax.After he died,his,breath,became wind and cloud;his,voice,became thunder and his,left eye,sun and,right,one moon;,arms and legs,became edges and mountains;,blood,became rivers and tendon(,筋脉,)became roads;,muscles,became fields and,hair,stars;,teeth and bones,became metals,pearls and jade;,sweat,became rain.,Pangu separated the earth,Reading,How Life Began on the Earth,Reading How Life Began on the,Do you know the origin of the human beings?,Do you know the origin of the,Man had evolved from apes.,Man had evolved from apes.,Earth,How life began on the earth,EarthHow life began on the ear,The Big Bang,The Big Bang,water,Plants in the water,Shellfish and fish,Plants on land,waterPlants in the waterShellf,Insects and amphibians,Reptiles,Dinosaurs,Mammals,Insects and amphibiansReptiles,water,green plants on land,2,3,4,How life began on the earth,Analysing,5,6,7,8,forests,shellfish and all sorts of fish,insects(on land),amphibians(on land and in water),reptiles(on land),dinosaurs(on land),mammals(on land)small clever animals with hands and feet,human,small plants in water,1,watergreen plants on land23How,A cloud of dust,Combine into a,solid,ball,Explode,with fire&rock,(produce H,2,O,CO,2,O,2,N,2,other gases),atmosphere,Cool down,water appeared,dissolve harmful gases into,Life began,Life developed,A cloud of dustatmosphereCool,The development of life,The development of life,Scanning,1.What was produced when the earth exploded?,2.How did water come into being on the earth?,3.Where did life first begin,on the land or in the sea?,4.Why were mammals different from other animals?,Scanning1.What was produced w,1.What was produced when the earth exploded?,Water vapour,carbon dioxide,oxygen,nitrogen and other gases.,2.How did water,come into being,on the earth?,The explosion of the earth produced water vapor,which turned into water when the earth cooled down.,1.What was produced when the,3.Where did life first begin,on the land or in the sea?,In the sea.Because water dissolved harmful gases and made it possible for life to begin.,4.Why were mammals different from other animals?,Because they produced their young from within their bodies.,3.Where did life first begin,Careful Reading,Finish the comprehending on page 27,Careful Reading,Think about what you have read and make choices.,Why was the earth different from other planets?,A it produced a lot of heat.B.The water remained.,C Water disappeared.D.It was the oldest planet.,Why was life able to develop on the earth but not on other planets?,A The earth had a solid shape.,B.The earth did not have harmful gases in its atmosphere.,C The water stayed on the earth but not on other planets.,D.The earth was not too hot and not too cold.,Think about what you have read,Why was it necessary for plants to grow before animals?,A Animals needed plants to protect them from the sun.,B Plants provided oxygen for animals to breathe.,C Animals could hide from hunters in forest.,D It was easier for plants to grow.,What problem is caused by human being?,A They exist everywhere on the earth.,B They cause global warming.,C They find new methods of growing crops.,D They enjoy hunting and fishing.,Why was it necessary for plant,Text Retelling,The explosion of the earth produced_ _,which turned into water when the earth cooled down.Water allowed the earth to _ harmful gases into the oceans and seas.That made it possible for _ to begin to develop.,The arrival of small _ encouraged the development of early _ and all sorts of fish.Many millions of years later the first green plants began to appear on land.,water,vapour,dissolve,life,plants,shellfish,Text Retelling The explosio,Later land animals appeared.Some were_.Others,called_,were able to live on land as well as in t
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