高一英语必修三unit4reading.ppt

1、Unit 4 reading,How Life Began on the Earth,Pangu separates the sky from the earth,The Goddess Nvwa mended the heaven and created human beings from the clay(粘土).,God created the world in seven days,match the main idea of each paragraph,Paragraph 1: Paragraph 2: Paragraph 3: Paragraph 4:,The importanc

2、e of water for life The development of plants and animals on the earth The formation of the earth A widely accepted theory about the formation of the universe,d,c,a,b,e. The arrival of humans and their impact on the earth,Paragraph 5:,e,Detailed reading This text can mainly divided into two stages,S

3、tage 1 : The development of the earth Stage 2 : The development of life,(para 13),(para 45),Stage 1: The development of the earth,(1) After the Big Bang, what was the earth like?,a cloud of dust,a solid globe,exploded with fire and rock,produced water vapour and gases,(2) What happened next?,(3) Wha

4、t did the water vapour and gases form?,the earths atmosphere,Water appeared,(4) What appeared as the earth cooled down?,water is important for the beginning of life on the earth.,Why is water so important for the beginning of life? Because water allowed the earth to dissolve harmful gases into ocean

5、s and seas.,？,1. Big Bang,How did the earth come into being?,Repeat,Stage2 The development of life,small plants appears in water,1.What life developed after water appeared?,Shellfish and all sorts of fish,2.What life developed in water next?,green plants began to grow on land,insects appeared,3.What

6、 about the life on land?,amphibians on land and in the water,forests,4. What life developed next on land?,reptiles appeared,dinosaur developed,5.What life developed after forests appeared?,mammals on land,6.What life developed after dinosaurs?,small clever animals,7. What life developed after mammal

7、s?,1.Who are the small clever animals with hands and feet? 2. Are they taking care of the earth well? Why?,?,Because they are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.,The earth may become too hot to live on .,Can you fill in th

8、e blanks?,2,3,4 5,6,7 8 9 10,1 small plants in water,sellfish and all sorts of fish,insects,reptiles,amphibians,mammals,dinosaurs,humans,plants,animals,Green plants on land,forests,1. Insects and amphibians appeared. 3. The earth became a solid ball. 5. Reptiles appeared. 7. The earth was a cloud of

9、 dust 9. Shellfish and other fish appeared. 11. Clever animals with hands and feet appeared,2. Dinosaurs 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 Band”. 12. Mammals appeared.,8,3,10,9,11,5,1,7,4

10、,12,6,2,Can you put the order of development of life into a time line?,summary,After the “big bang”, the earth was still just a cloud of _,it _loudly with fire and rock, which were _ to produce the_, water vapour and other gases. Then _ began to appeared on the earth.,dust,exploded,in time,carbon,wa

11、ter,_ in water are considered to be the earliest lives on the earth. The O2they supplied encouraged the lives of_. Slowly green plants grew on land, which were followed by _like insects & _. When the plants grew into_, _ appeared. Then _ developed but disappeared later, which made the rise of a totally different animal,_, possible, and finally _ spread all over the world.,shell-,-fish and fish,amphibians,forests,reptiles,dinosaurs,mammal,humans,The small plants,land animals,The ea