Howlifebeganontheearth阅读公开课学习教案
会计学1Howlifebeganontheearth阅读公开课阅读公开课第一页，编辑于星期六：十三点 四十四分How Life Began on the Earth第1页/共50页第二页，编辑于星期六：十三点 四十四分Do you know how life began on earth is explained in different religions and cultures? 第2页/共50页第三页，编辑于星期六：十三点 四十四分Pangu separates the sky from the earth 第3页/共50页第四页，编辑于星期六：十三点 四十四分God created the world in seven days第4页/共50页第五页，编辑于星期六：十三点 四十四分Some legends about the beginning of universe.What is the scientific theory about the beginning of life on the earth?That is the topic we are going to talk about.Follow me, We will get it第5页/共50页第六页，编辑于星期六：十三点 四十四分。
第6页/共50页第七页，编辑于星期六：十三点 四十四分Read the passage quickly to catch the main idea of the passage :Topic:_Key words:_-_-_-_第7页/共50页第八页，编辑于星期六：十三点 四十四分Key words:1._2._3._4._ Topic: _ How Life Began on the earthairwaterplantsanimals第8页/共50页第九页，编辑于星期六：十三点 四十四分New words The universebegan with a“Big Bang”.第9页/共50页第十页，编辑于星期六：十三点 四十四分 Stephen William Hawking,put forward a theory about black holes.理论，学说i:ri：第10页/共50页第十一页，编辑于星期六：十三点 四十四分The most powerful force in the univers is atomic bomb 原子的(adj)atom原子tm第11页/共50页第十二页，编辑于星期六：十三点 四十四分。
Carbon ,nitrogen,water vapour and other k:bn naitrdn veipgases are to make the earhs atmosphere.tmsfi第12页/共50页第十三页，编辑于星期六：十三点 四十四分 mltiplaiPlants multiplied and filled the oceans and sea with oxgen第13页/共50页第十四页，编辑于星期六：十三点 四十四分amphibiansmfibinAmphibians can live in the water as well as on land.第14页/共50页第十五页，编辑于星期六：十三点 四十四分Reptiles produced young generallybylaying eggsreptail第15页/共50页第十六页，编辑于星期六：十三点 四十四分 mmlMammals like monkeysgave birth to young baby animals and produced milk to feed them.第16页/共50页第十七页，编辑于星期六：十三点 四十四分。
,fndmentlWater was to be fundamental to the development of life.be base on第17页/共50页第十八页，编辑于星期六：十三点 四十四分Water allowed the earth to dissove hurmful gases and acids into the oceans. This produced a chain reaction,which made it possible for life to develop.第18页/共50页第十九页，编辑于星期六：十三点 四十四分 k:bn daiksaidThey are putting too much carbon dioxide into the atmosphere ,which prevents heat from escaping the earth into space第19页/共50页第二十页，编辑于星期六：十三点 四十四分in time 及时及时lay eggs 下蛋下蛋give birth to 分娩分娩in one turn 轮到某人轮到某人prevent .from.=stop from第20页/共50页第二十一页，编辑于星期六：十三点 四十四分。
第21页/共50页第二十二页，编辑于星期六：十三点 四十四分Para. 4 The arrival of humans and their impact on the earth. Para. 5 The development of plants and animals on the earth.第22页/共50页第二十三页，编辑于星期六：十三点 四十四分 第23页/共50页第二十四页，编辑于星期六：十三点 四十四分第24页/共50页第二十五页，编辑于星期六：十三点 四十四分第25页/共50页第二十六页，编辑于星期六：十三点 四十四分A cloud of dustA cloud of dustCombine into a Combine into a solidsolid ball ballExplodeExplodewith fire & rockwith fire & rock(produce H(produce H2 2O, COO, CO2,2,OO2, 2, NN2, 2, other gases)other gases) atmosphereatmosphereCool downCool downwater appearedwater appeared Life began Life began and and developeddevelopedplants-animals第26页/共50页第二十七页，编辑于星期六：十三点 四十四分。
Fish and shellfish第27页/共50页第二十八页，编辑于星期六：十三点 四十四分amphibians第28页/共50页第二十九页，编辑于星期六：十三点 四十四分retiles第29页/共50页第三十页，编辑于星期六：十三点 四十四分dinosaurs第30页/共50页第三十一页，编辑于星期六：十三点 四十四分Mammals第31页/共50页第三十二页，编辑于星期六：十三点 四十四分human beings第32页/共50页第三十三页，编辑于星期六：十三点 四十四分第33页/共50页第三十四页，编辑于星期六：十三点 四十四分1073 849615212111. 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 Bang.12. Mammals appeared.第34页/共50页第三十五页，编辑于星期六：十三点 四十四分。
True (T) or False (F).1. The earth appeared before the Big Bang happened.2. The original atmosphere consisted of nitrogen and oxygen. 3. The main difference between the earth and other planets is that there is water on the earth. 4. Life began in water and then on land.FFTTDiscuss in groups:第35页/共50页第三十六页，编辑于星期六：十三点 四十四分5. Mammals appeared before the development of dinosaurs.6. Dinosaurs could give birth to young baby animals and produced milk to feed them. 7. Human beings produce too much carbon dioxide which causes the global warming on the earth. 8. According to the text, human beings would disappear in the end. FFTF第36页/共50页第三十七页，编辑于星期六：十三点 四十四分。
1. What was there on the earth before life could begin? 2. Why do scientists think there has never been life on the moon? 3. Why did animals first appear in the seas? 4. Why did green plants help life to develop? 5. Why were mammals different from other animals?Answer the following questions :第37页/共50页第三十八页，编辑于星期六：十三点 四十四分vapourdioxideoxygen第38页/共50页第三十九页，编辑于星期六：十三点 四十四分the oceans and seas. waterdissolve harmful gases第39页/共50页第四十页，编辑于星期六：十三点 四十四分carbon dioxideoxygen.第40页/共50页第四十一页，编辑于星期六：十三点 四十四分。
第41页/共50页第四十二页，编辑于星期六：十三点 四十四分III. Read the text and fill in the blanks in the following form.TimeWhat happenedBig Bang_ began to form and combine to create stars and other bodies.Atoms第42页/共50页第四十三页，编辑于星期六：十三点 四十四分Between 4.5 and 3.8 billion years agoDust settled into a solid and _ globe.The earth exploded to produce its_ .The continued _ of water allowed the earth to dissolve harmful gases and _ into the oceans and seas.violentatmospherepresenceacids第43页/共50页第四十四页，编辑于星期六：十三点 四十四分Many millions of years laterThe first small plants on the surface of the water produced_ .Early _ and all sorts of fish appeared.Green plants began to grow on land. Insects and_ appeared.oxygenshellfishamphibians第44页/共50页第四十五页，编辑于星期六：十三点 四十四分。
Many millions of years later_ appeared and they laid eggs.Dinosaurs developed, laid eggs and _ for more than 140 million years.Mammals rose and _ babies.Reptilesexistedgave birth to第45页/共50页第四十六页，编辑于星期六：十三点 四十四分About 2.6 million years agoSome small _ animals with hands and feet appeared and spread all over the earth.NowHumans produce too much carbon _, making the earth too hot.cleverdioxide第46页/共50页第四十七页，编辑于星期六：十三点 四十四分The development of lifeThe development of life第47页/共50页第四十八页，编辑于星期六：十三点 四十四分A cloud of dust a solid ball presence of water on the water shellfish & other fish plants begin to grow on dry land insects and amphibians appear retiles appear dinosaurs appear mammals appearTheThe development of life development of lifesmall plants growon the water appearshellfish & other fishplants begin to grow on drylandinsects and amphibians appearreptiles appeardinosaurs appearmammals appear第48页/共50页第四十九页，编辑于星期六：十三点 四十四分。
Thank you very much.Good bye!第49页/共50页第五十页，编辑于星期六：十三点 四十四分。
