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1、WELCOME TO MY ENGLISH WORLD!2021/8/11 星期三1Step 1 Lead in Look at two pictures,try to give as much information as possible.2021/8/11 星期三22021/8/11 星期三32021/8/11 星期三4 Unit4 Astronomy:thescience of the stars2021/8/11 星期三5Step 2 Warming up Do you know how many planets circle around the sun in our solar
2、system?What are they?Can you match the names with the planets?2021/8/11 星期三6JupiterUranusNeptuneSaturnMercuryMarsEarthVenus水星水星 金星金星 地球地球 火星火星木星木星土星土星天王星天王星 海王星海王星2021/8/11 星期三7Step 3 A quizWhats the end of the world?Its“D”.Whats the beginning of the world?Its“W”.2021/8/11 星期三8 Step 4 Pre-reading Ea
3、ch religion and culture has its own ideas about how life began on earth.What do you know?In China,we all know that Pangu separates the sky from the earth.The Goddess Nvwa mended the heaven and created human beings.In western culture,God created the world in six days.2021/8/11 星期三9Pangu separates the
4、 sky from the earth.2021/8/11 星期三10Nvwa makes human beings.2021/8/11 星期三11God created man.上帝造人上帝造人2021/8/11 星期三12 What is the passage about?Step 5 Reading How life began on the earth.2021/8/11 星期三13 While-readingListen to the tape of the reading passage and match the main idea for each paragraph.202
5、1/8/11 星期三14Main idea of each paragrapha.The importance of water for life b.The development of plants and animals on the earth c.The formation of the earth d.A widely accepted theory about the formation of the universe dcab e.ThearrivalofhumansandtheirimpactontheearthParagraph5:Paragraph1:Paragraph2
6、:Paragraph3:Paragraph4:e2021/8/11 星期三15 While-readingWork in pairs.Put the order of developmentof life into a timeline according to the reading passage.2021/8/11 星期三16Put the order of development of life into a time line.A.Insects and amphibians appeared.B.The earth became a solid ball.C.Reptiles ap
7、peared.D.The earth was a cloud of dust.E.Shellfish and other fish appearedF.Dinosaurs appeared.G.Small plants grew on the water.H.Plants began to grow on dry land.I.Water appeared on the earth.J.Mammals(including humans)appeared.DBIGEHACFJ2021/8/11 星期三17 While-readingThink about what you have read a
8、nd make choices.2021/8/11 星期三18Why 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 harm
9、ful 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.ks5u精品课件2021/8/11 星期三19Why did the plants grow before animals came?A Animals needed plants to protect them from the sun.B Plants provided oxygen for animals to breathe.C
10、Animals could hide from hunters in forest.D It was easier for plants to grow.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.ks5u精品课件2021/8/11 星期三20 Step 6 Looking and th
11、inking Look at the following pictures and try to understand more of the reading passage.2021/8/11 星期三21A cloud of dustA solid globe Explode atmosphere water2021/8/11 星期三22Cells separatePlants in the waterEarly shellfish and fishPlants on landoxygen2021/8/11 星期三23Insects and amphibiansReptiles Dinosa
12、urs Mammals 2021/8/11 星期三24Man had evolved from apes.2021/8/11 星期三25The development of life2021/8/11 星期三26As a student,what little things can we do for the earth?to prevent the earth from getting hotter and hotter to slow down the problem getting worse 2021/8/11 星期三27We have only one earth!We should
13、 take care of the earth!ks5u精品课件2021/8/11 星期三28Whether life will continue on the earth depends on human beings.Only if we care will we help,only if we help shall all be saved!2021/8/11 星期三29Step 8 Homework 1.Read aloud the reading passage and underline the useful phrases and sentence patterns.2.Fini
14、sh off Ex1and Ex2 on P.28.2021/8/11 星期三302021/8/11 星期三31 Step 5 Summing upHow life began on the earth1.small plants in water2.shellfish and all sorts of fish 3.green plants on land4.Insects(on land)5.amphibians(on land and in water)6.forests7.Reptiles(on land)8.Dinosaurs(on land)9.Mammals(on land)10
15、.small clever animals with hands and feet 11.humans2021/8/11 星期三32What subjects do you learn at school?lChineselEnglish lmathematicslphysicslhistorylgeographylphysicslbiologylchemistrybrainstorminggeophysicsbiochemistry2021/8/11 星期三33 Task 3:Careful reading1.What was there on the earth before life c
16、ould begin?Water vapour,carbon dioxide,oxygen,nitrogen and other gases.2.Why do scientists think there has never been life on the moon?Because there is no water on the moon.3.Why did animals first appear in the seas?Because water allowed the earth to dissolve harmful gases into the oceans and seas.2
17、021/8/11 星期三34 4.Why did green plants help life to develop?Because green plants can take carbon dioxide from the atmosphere and fill the air with oxygen.5.Why were mammals different from other animals?They were different because they produced their young from within their bodies.6.How did water come
18、 into being on the earth?The explosion of the earth produced water vapor,which turned into water when the earth cooled down.2021/8/11 星期三35Water Air Life is the headspring of life.?How Life Began on the Earth Water2021/8/11 星期三36_made it possible for life to begin to develop.Water2021/8/11 星期三37Plan
19、ts encouraged the development of _.early shellfish and all sorts of fish2021/8/11 星期三38Later _ appeared.land animals insectsamphibians2021/8/11 星期三39When plants grew into forests,_ appeared for the first time.reptiles2021/8/11 星期三40Some huge animals,called _,developed.dinosaurs2021/8/11 星期三41When dinosaurs disappeared,_ became more important.mammals2021/8/11 星期三42 came into being and spread all over the world.What life developed after mammals?Humans2021/8/11 星期三43