1、Unit 4 Astronomy：the science of the starsWarming Up&Reading(I)12THE SOLAR SYSTEMA.地球 _B.木星 _C.火星 _D.水星 _E.海王星 _F.冥王星 _G.土星 _H.天王星 _I.金星 _EarthJupiterMarsMercuryNeptunePlutoSaturnUranusVenusCan you name each planet correctly using the letters given in the table below?3astronomyastronomerstelescope4Wh
2、at subjects do you learn at school?lChineselEnglish lmathematicslphysicslchemistrylgeographylbiologylhistorylpolitics5physicsmathematicschemistrybiologygeographyScience subjects6Warming upgeophysicsgeology physics地质学物理学 astronomy physics mathematics地球物理学Some science subjects willstudy two or more of
3、 thesesubjects.7biology+chemistry=biochemistry()biomedicine()geopolitics（地缘政治学）=_+_bioengineering(_)=_+_生物化学医学geologypolitics生命工程学biologyengineeringCommon sense of science subjectsCan you understand the following combined science subjects?8astronomy biochemistry geophysics medicine_the scientific st
4、udy 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“black holes”.astronomybiochemistrygeophysicsmedicine9Study
5、 of the groups of life(生命的种类/物种)Look at the pictures and tell the groups.1.insects2.plants3.reptiles（爬行类）4.shellfish（贝类）5.fish6.amphibians（两栖类）7.mammals(哺乳类)8.human beings10Study of the groups of life(生命的种类/物种)Look at the pictures and tell the groups.11Study of the groups of life(生命的种类/物种)Look at th
6、e pictures and tell the groups.12Study of the groups of life(生命的种类/物种)Look at the picture and tell the groups.13Study of the groups of life(生命的种类/物种)Look at the pictures and tell the groups.14Study of the groups of life(生命的种类/物种)Look at the pictures and tell the groups.15Study of the groups of life(
7、生命的种类/物种)Look at the picture and tell the groups.16Study of the groups of life(生命的种类/物种)Look at the pictures and tell the groups.17Study of the groups of life(生命的种类/物种)Look at the pictures and tell the groups.18Study of the groups of life(生命的种类/物种)Look at the picture and tell the groups.19Study of t
8、he groups of life(生命的种类/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 family because of different kinds of life living together.But how did life begin on the earth?21The Big Bangwatersmall plantsinsects and amphibians on la
9、ndreptiles on landmammalsdinosaurs22The Big Bangadvanced mammals23the beginning of the lifePangu separated Nvwa created God created the sky humans the world 盘古开天女娲造人上帝创世论Do you believe the passage which tells you the truth about the beginning of life?Why?24Reading How Life Began on the Earth251.Conc
10、lude 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 development 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
11、life on it.theoryoriginearthimportanceplantsanimalshumansinfluence/effectformationdevelopment261.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?Scanning271.W
12、hat was produced when the earth exploded?Carbon,nitrogen water vapour and other gases.2.How did water come into being on the earth?The explosion 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.B
13、ecause water dissolved harmful gases and made it possible for life to develop.4.Why were mammals different from other animals?Because they 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
14、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 like?a cloud of dusta solid globe 31exploded loudly with fire and rockproduced water vapour and gases(2)What happened next?32(3)What did the water vapour and gases for
15、m?the earths atmosphere33water appeared(4)What appeared as the earth cooled down?Water is important for the beginning of life on the earth.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 fis
16、h.2.What life developed in water next?37Green plants began to grow on land.Insects appeared.3.What about the life on land?38Amphibians 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?40Mam
17、mals on land.6.What life developed after dinosaurs?41Small clever animals.7.What life developed after mammals?4223456789101 small plants in watershellfish and all sorts of fishinsectsreptilesamphibiansmammalsdinosaurshumansplantsanimalsgreen plants on landforestsCan you fill in the blanks?438391262E
18、x.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.Shellfish 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.Dinos
19、aurs 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.45Careful Reading Finish the comprehending on page 2746 Choose the best answers.1.Why was the earth different from the other plan
20、ets?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 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
21、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.Animals 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 plan
22、ts 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 new 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 puzzle
23、s 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 planets?How did the dinosaurs disappear?49water vapourRetellThe explosion of the earth produced _ _,which turned into water when the earth cooled down.Water allowed the
24、 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.dissolvelifeplantsshellfish50insectsamphib
25、iansreptilesdinosaursmammalsLater land animals appeared.Some were _.Others,called _,were able to live on land as well as in the water.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
26、 disappeared,_ became more important.51producedappearedspreadThey were the last group of animals and they were different because 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
