人教版高中英语课件Unit4Astronomyreading原创

1、chinese mythology pangu separated the sky from the earth.chinese mythology nuwa made human beingsbible god created the world scientific theory “big bang”tapetask 1: fill in the blankstask 2: tell the main idea of each para.“big bang” happened_ began to form and combineafter several billion years the

2、 earth: a cloud of _4.5 3.8 billion years agothe earth: a _ globe; _ appearedmany millions of years later_ started to developabout 2.6 million years ago_ appearedatomsdustsolidwaterlifehuman beings para 1 para 2 para 3 para 4 para 5a. the importance of water for lifeb. the formation of the earthc. t

3、he arrival of human and their impact on the earthd. a widely accepted theory about the formation of the universe e. the development of plants and animals on the earthtask 1 : the formation of the earths atmospheretask 2: the development of life reason: the earth _ loudly with fire and rock. ingredie

4、nts: _, nitrogen, water _ and other _. results: the earth _ down and water began to appear on its _.explodedcarbonvapourgasescooledsurface 21 small plants in water3 green plants on land456 forests7892 shellfish and all sorts of fish4 insects (on land)5 amphibians (on land and in water)7 reptiles (on

5、 land)8 dinosaurs (on land)9 mammals (on land)_made it possible for life to begin to develop.waterplants encouraged the development of _.early shellfish and all sorts of fishlater _ appeared. land animals insectsamphibianswhen plants grew into forests, _ appeared for the first time.reptilessome huge animals, called _, developed.dinosaurswhen dinosaurs disappeared, _ became more important. mammalssmall clever animals with hands and feet human beingstoo much carbon dioxidetoo hot to livewhat will human do? useful words: environment; pollution; plastic ba