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1、Unit 4 Astronomy：the science of the starsWarming Up&Reading(I)12THE SOLAR SYSTEM A.地球地球 _B.木星木星 _C.火星火星 _D.水星水星 _E.海王星海王星 _F.冥王星冥王星 _G.土星土星 _H.天王星天王星 _I.金星金星 _EarthJupiterMarsMercuryNeptunePlutoSaturnUranusVenusCan you name each planet correctly using the letters given in the table below?3astronomya
2、stronomerstelescope4What subjects do you learn at school?lChineselEnglish lmathematicslphysicslchemistrylgeographylbiologylhistorylpolitics5physicsmathematicschemistrybiologygeographyScience subjects6Warming upgeophysicsgeology physics 地质学地质学 物理学物理学 astronomy physics mathematics地球物理学地球物理学Some scienc
3、e subjects willstudy two or more of thesesubjects.7biology+chemistry=biochemistry()biomedicine()geopolitics（地缘政治学）（地缘政治学）=_+_bioengineering(_)=_+_生物化学生物化学医学医学geologypolitics生命工程学生命工程学 biologyengineeringCommon sense of science subjectsCan you understand the following combined science subjects?8astron
4、omy biochemistry geophysics medicine_the scientific study of treatment of diseases and injuries._ the scientific study of the chemistry of living things._ the scientific study of the earths atmosphere,oceans and climate._ the scientific study of objects in space,such as planets,stars,comets and“blac
5、k holes”.astronomybiochemistrygeophysicsmedicine9Study of the groups of life(生命的种类生命的种类/物种物种)Look at the pictures and tell the groups.1.insects2.plants3.reptiles（爬行类）（爬行类）4.shellfish（贝类）（贝类）5.fish6.amphibians（两栖类）（两栖类）7.mammals(哺乳类哺乳类)8.human beings10Study of the groups of life(生命的种类生命的种类/物种物种)Look
6、at the pictures and tell the groups.11Study of the groups of life(生命的种类生命的种类/物种物种)Look at the pictures and tell the groups.12Study of the groups of life(生命的种类生命的种类/物种物种)Look at the picture and tell the groups.13Study of the groups of life(生命的种类生命的种类/物种物种)Look at the pictures and tell the groups.14St
7、udy of the groups of life(生命的种类生命的种类/物种物种)Look at the pictures and tell the groups.15Study of the groups of life(生命的种类生命的种类/物种物种)Look at the picture and tell the groups.16Study of the groups of life(生命的种类生命的种类/物种物种)Look at the pictures and tell the groups.17Study of the groups of life(生命的种类生命的种类/物种物
8、种)Look at the pictures and tell the groups.18Study of the groups of life(生命的种类生命的种类/物种物种)Look at the picture and tell the groups.19Study of the groups of life(生命的种类生命的种类/物种物种)Look at the picture and tell the groups.20What is the most important condition for life to grow?The world is like a big famil
9、y because of different kinds of life living together.But how did life begin on the earth?21The Big Bangwatersmall plantsinsects and amphibians on landreptiles on landmammalsdinosaurs22The Big Bang advanced mammals23the beginning of the lifePangu separated Nvwa created God created the sky humans the
10、world 盘古开天盘古开天 女娲造人女娲造人 上帝创世论上帝创世论Do you believe the passage which tells you the truth about the beginning of life?Why?24Reading How Life Began on the Earth251.Conclude the main idea of each paragraph.1)A widely _ about the _ of the universe.2)The formation of the _.3)The _ of water for life.4)The d
11、evelopment of _ and _ on the earth.5)The arrival of _ and their _ on the earth.2.The main idea of the text.The text mainly tells us the _ of the earth and the _ of life on it.theoryoriginearthimportanceplantsanimalshumansinfluence/effectformationdevelopment261.What was produced when the earth explod
12、ed?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?Scanning271.What was produced when the earth exploded?Carbon,nitrogen water vapour and other gases.2.How did water come into being on the earth?The e
13、xplosion of the earth produced water vapour,which turned into water when the earth cooled down.283.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 develop.4.Why were mammals different from other animals?Because th
14、ey gave birth to young baby animals and produced milk to feed them.29Detailed ReadingThis text can be mainly divided into two stages:Stage 1:The development of the earthStage 2:The development of life(Para.13)(Para.45)30Stage 1:The development of the earth(1)After the Big Bang,what was the earth lik
15、e?a cloud of dust a solid globe 31exploded loudly with fire and rock produced water vapour and gases(2)What happened next?32(3)What did the water vapour and gases form?the earths atmosphere33water appeared(4)What appeared as the earth cooled down?Water is important for the beginning of life on the e
16、arth.34Stage 2:The development of life35 Small plants appeared on the surface of the water.1.What life developed after water appeared?36Shellfish and all sorts of fish.2.What life developed in water next?37Green plants began to grow on land.Insects appeared.3.What about the life on land?38Amphibians
17、 on land as well as in the water.forests4.What life developed next on land?39 Reptiles appeared.Dinosaurs developed.5.What life developed after forests appeared?40Mammals on land.6.What life developed after dinosaurs?41Small clever animals.7.What life developed after mammals?4223456789101 small plan
18、ts in watershellfish and all sorts of fish insects reptilesamphibiansmammalsdinosaurs humansplantsanimalsgreen plants on landforestsCan you fill in the blanks?438391262Ex.2 on P271.Insects and amphibians appeared.3.The earth became a solid ball.5.Reptiles appeared.7.The earth was a cloud of dust.9.S
19、hellfish and other fish appeared.11.Clever animals with hands and feet appeared.Can you put the order of development of life into a timeline?4410115174Ex.2 on P272.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 beg
20、an with a“Big Bang”.12.Mammals appeared.45Careful Reading Finish the comprehending on page 2746 Choose the best answers.1.Why was the earth different from the other planets?A.It produced a lot of heat.B.The water remained.C.Water disappeared.D.It was the oldest planet.2.Why was life able to develop
21、on the earth but not on the 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 the other planets.D.The earth was neither too hot nor too cold.473.Why was it necessary for plants to grow before animals?A.Anim
22、als needed plants to protect themselves 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.4.What problem is caused by human beings?A.They exist everywhere on the earth.B.They cause global warming.C.They find ne
23、w methods of growing crops.D.They enjoy hunting and fishing.48How life began on earth is one of the biggest puzzles that scientists found hard to solve.What other puzzles are hidden in the passage?Ex.5 on P27How did the universe(earth)form?Why did the earth cool down?Why did water disappear on other
24、 planets?How did the dinosaurs disappear?49water vapourRetell 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 _ encourag
25、ed the development of early _ and all sorts of fish.Many millions of years later the first green plants began to appear on land.dissolvelifeplantsshellfish50insectsamphibiansreptilesdinosaursmammals Later land animals appeared.Some were _.Others,called _,were able to live on land as well as in the w
26、ater.When the plants grew into forests,_ appeared for the first time.Then _ developed,which became the most important animals on the earth for millions of years.After they disappeared,_ became more important.51producedappearedspread They were the last group of animals and they were different because
27、 they _ their young from within their bodies.Small clever animals,with hands and feet,_ and _ all over the earth.As time went by,they covered the earth and have become the most important animals on the planet.52Homework1.Finish the exercise 1 and 2 on page 63.2.Read the text again and find out your difficult points.53Look before you leap.First think,then act.三思而后行。54