高中英语Book-3Unit4How-life-began-on-earth公开课优质获奖课件.ppt（纯ppt,不包含音视频素材）

1、1 Do you know which one is not a mammal哺乳动物哺乳动物?2 Snakes and tortoises belong to _,while frogs and toads belong to_.A amphibians 两栖动物两栖动物 B reptiles爬行动物爬行动物 koalaEach religion and culture has its own ideas about how life began on earth.What do you know?Big BangPangu separates the sky from the earth.

2、Nvwa mends the heaven and creates human beings.God creates the world?How Life Began on the Earth：Which came first?1.This passage is mainly about _.A the earths atmosphere B the solar system C the development of life D the difference between the earth and other planets Fast reading Paragraph 1:Paragr

3、aph 2:Paragraph 3:Paragraph 4:Paragraph 5:D.A widely accepted theory about the formation of the universe C.The formation of the earth A.The importance of water for life B.The development of plants and animals on the earth E.The arrival of humans and their impact on the earth2.Match the main idea of

4、each paragraph.Fast reading The development of a planet generally depends on _combining together.A atoms B rocks C gases D water Careful reading 1.What happened shortly after the“Big Bang”?A The earth was just a cloud of energetic dust B The earth became a solid ball quickly C The earths atmosphere

5、appeared D Water stayed on the moon Careful reading 2.What began to appear on the earths surface when it cooled down?A Water B Gases C Acids D Carbon 3.What is the original earths atmosphere made up of?carbon,nitrogen,water vapor,and other gases1.what is fundamental to the development of life?WaterC

6、areful reading 1.What makes the earth different from other planets?A Its quite warm on the earth.B There is plenty of atmosphere.C Small plants growing on the surface of the water arrived.D The first oceans and seas were filled with oxygen.Careful reading 2.When _,reptiles appeared.A the first green

7、 plants began to appear on land B land animals appeared C the plants grew into forests D early shellfish developed 3.Why were mammals different from other life forms?A.Because they gave birth to young baby animals and produced milk to feed them B.Because they produced young generally by laying eggs

8、C.Because they were able to live on land as well as in the water D.Because they live on grass 4.Which kind of life-being first appeared on the earth,plants or animals?Plants.From the last paragraph we can infer that the author is _.A confident B sad C concerned D angry Work in pairs.Put the order of

9、 development of life into a timeline according to the reading passage.Put the order of development of life into a time line.A.Insects and amphibians appeared.B.The earth became a solid ball.C.Reptiles appeared.D.The earth was a cloud of dust.E.Shellfish and other fish appearedF.Dinosaurs appeared.G.

10、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.DBIGEHACFJTrue or false 1.According to a widely accepted theory,the universe a“Big Bang”,after which the earth was still for several billionyears.2.As the earth cooled

11、down,water began to appear on its surface.3.Water harmful gases and acids,and it only appeared on the earth.4.As for mammals,they produced young generally by laying eggs.5.Clever animals with hands and feet,are protecting the earth well instead of other less important animals.Lets review the evoluti

12、on of life on the earth.watersmall plantsinsects and amphibianson landreptiles on landmammals advanced mammalsdinosaurs developed new methods of growing food(1)What humans developed?developed new methods of hunting developed new methods of moving aroundGreenhouse effect(2)But they are not taking car

13、e of the earth very well.What problems are humans causing?putting carbon dioxide into the atmospherethe earth may become too hotAs a student,what little things can we do for the earth?use solar energy plant trees recycle rubbish prevent desertificationsave water purify airWe ought to.We should ing i

14、s a good choice.Earth Song What about sunrise What about rain What about all the thingsThat you said we were to gain.What about killing fieldsIs there a time What about all the things That you said was yours and mine.Did you ever stop to notice All the blood weve shed beforeDid you ever stop to noti

15、ce The crying Earth the weeping shores?Aaaaaaaaaah AaaaaaaaaahWhat have we done to the worldLook what weve doneWhat about all the peace That you pledge your only son.What about flowering fields Is there a timeWhat about all the dreams That you said was yours and mine.Did you ever stop to notice All the children dead from warDid you ever stop to notice The crying Earth the weeping shoresI used to dream I used to glance beyond the starsNow I dont know where we are Whether 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!