人教版必修三unit4reading.pptx

Unit 4 Astronomy:the science of the stars人教版英语人教版英语 必修三必修三 unit4 编者：内蒙古巴彦淖尔市编者：内蒙古巴彦淖尔市奋斗中学奋斗中学 英语组英语组 贾魏巍贾魏巍天文学天文学天文学家天文学家 太阳系太阳系 原子原子 猛烈的；激烈的猛烈的；激烈的 二氧化碳二氧化碳 大气层大气层 连锁反应连锁反应 氧气氧气 水生有壳动物水生有壳动物两栖动物两栖动物恐龙恐龙哺乳动物哺乳动物AstronomyAstronomerSolar systemAtomViolentCarbon dioxideChain reactionAmphibianOxygenmammalDinosaurShellfishAtmospherenew wordsThe Solar system eight planets many comets other objects Warming UpThere used to be nine planets in the solar system.Recently scientists have decided that one of them can no longer be considered a planet.Do you know the name of that planet?Do you know why they removed it?Pluto.Scientists now think it is too small to be called a planet.sunMercuryVenusEarthMarsJupiterSaturnUranusNeptunePluto水星水星金星金星火星火星木星木星土星土星天王星天王星海王星海王星冥冥王王星星The Solar system Each religion and culture has its own ideas about how life began on earth.What do you know?Pre-reading In china,Pangu separated the sky from the earth The Goddess Nvwa mended the heaven and created human beings.In china：In other countries：The Holy Bible says that the God created the world and the human beingsIn India：Brahma(梵天梵天)is the creator(创造者创造者)of the universe and all living beings（生物）（生物）Big BangWater Air sunWater is the headspring(源泉源泉)of life.?What is the most important thing for all types of life on the earth?How Life Began on the EarthPara.1 The formation(形成形成)of the earth.Para.2 The importance of water for life.Para.3 A widely accepted theory about the formation of the universe.Para.4 The arrival of humans and their impact on the earth.Para.5 The development of plants and animals on the earth.skimming listen to the tape and matchthe main idea of each paragraph1073 8 49 6 1 5 2 12 111.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.scanningreading for detailsTimeWhat happenedBig Bang_ began to form andcombine to create _and other_.Read the text and fill in the blanks in the following form.AtomsstarsbodiesQuestions for Par.1: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.Questions for Para.2,3:2.water7.Plants in the water1.Shellfish and fish8.Plants on landQuestions for Para.4:read the passage and give the right timeline3.Insects and amphibians4.Reptiles 5.Dinosaurs 6.Mammals 12345678Man had evolved from apes.Questions for Para.4The humans came into being and spread all over the world.what problem do human beings cause?A.They cause global warming.B.They exist everywhere on the earth.C.They find new methods of growing crops.D.They enjoy hunting and fishing.Questions for Para.5:Summary After the“Big Bang”,the earth was just a cloud of _.It _ loudly with fire and rock,which were in time to produce _,nitrogen,water vapour and other gases.Then small plants grew.They_ and filled the oceans and seas with_,which encouraged the later development of early _and all sorts of fish.When the plants grew into forests,_ appeared for the first time.They produced young generally by _ eggs.dustexplodedcarbonmultiplied oxygenShellfishreptileslayingPost reading When dinosaurs disappeared,_ became more important.Small clever animals with _ appeared and _ all over the world.As time went by they covered the earth and they are putting too much carbon dioxide into the _,which _ heat _ escaping from the earth into space.Whether life will continue on earth for millions of years to come will _ whether this problem can be solved.hands and feetdepend onfrompreventatmospherespread mammalsSummaryWhat can we do to deal with theproblem caused by human beingsYou can use the following words and phrases and sentences to help you:global warming carbon dioxide atmosphereprevent from harmful in turn depend on as a result thusWhat we can do is toWhat we cant do is to solar energy plant trees recycle rubbishpurify(使纯净使纯净)airgive off smokecut down the treesLets take part in the activities to save the earth!Retell the text,and then write a summary(about 100 words)of the text in your own words.Thank you very much.Good bye!