人教版高中英语高一必修3-Unit4-How-Life-Began-on-the-Earth课件.pptx（纯ppt,不包含音视频素材）

1、 Each religion or culture has its own ideas about the beginning of the universe.Pan Gu separated the sky from the earthGod created the worlda cloud of dustviolent surfacewaterBig Bangatmospherea globeatomsThe development of the earthPara.1 Para.2Para.3 A widely accepted theory about how the universe

2、 was formedThe formation(形成形成)of the earthThe importance of water for lifeMain idea of paragraph 13How Life Began on the Earthmammallay eggsmaninsectearly plantdinosaur fishamphibianreptilecellPara.4Para.5The development of plants and animals on the earthMain idea of each paragraphThe arrival of hum

3、ans and their impact on the earthwatergreen plants on land234How life began on the earth5678forestsshellfish and all sorts of fishinsects(on land)amphibians(on land and in water)reptiles(on land)dinosaurs(on land)mammals(on land)small clever animals with hands and feet human small plants in water1Co

4、mprehensive questions2.What are the differences between reptiles and mammals?3.How did dinosaurs disappear?Why is it wrong to show films with dinosaurs and humans together?4.What problems are caused by human?1.Why was the earth different from the other planets?Comprehensive question1.Why was the ear

5、th different from the other planets?Because water appeared and remained on the earth constantly,which help dissolve harmful gases and acids and made it possible for life to develop.Comprehensive questions2.What are the differences between reptiles and mammals?Reptiles produced young by laying eggs;M

6、ammals give birth to young baby animals and produce milk to feed them.cold-blooded VS.warm-bloodedComprehensive questions3.How did dinosaurs disappear?The sudden disappearance of dinosaurs still remains a mystery.Dinosaurs died out long before human beings developed on the earth.Why is it wrong to s

7、how films with dinosaurs and humans together?Comprehensive questions 4.What problems are caused by human beings?Global warmingGreenhouse effect:too much carbon dioxide are put into the atmosphere,which prevents heat from escaping from the earth into space.Put them into a timeline Insects and amphibi

8、ans appeared.The earth became a solid ball.Reptiles appeared.The earth was a cloud of dust.Shellfish and other fish appeared.Clever animals with hands and feet appeared.Dinosaurs appeared.Small plants grew on the water.Plants began to grow on dry land.Water appeared on the earth.The universe began with a“Big Bang”.Mammals appeared.Help,Im sick!Im unhappy!Human beings dont take care of the earth very well and the earth may become unfit to live on.What will happen to our planet?Whats the future of the Earth?Now you are the earth,what will you say to the human beings.Group work