人教版高中英语必修三unit4 reading 1.ppt

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 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 mammals? 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 . 1. Insects and amphibians appeared. 3. The earth became a solid ball. 5. Reptiles appeared. 7. The earth was a cloud of 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 12 6 2 Can you put the order of development of life into a time line? Ex.2 on P27 IV. True (T) or False (F). 1. The earth appeared before the Big Bang happened. 2. The original atmosphere consisted of nitrogen and oxygen. 3. The main difference between the earth and other planets is that there is water on the earth. 4. Life began in water and then on land. F F T T 5. Mammals appeared before the development of dinosaurs. 6. Dinosaurs could give birth to young baby animals and produced milk to feed them. 7. Human beings produce too much carbon dioxide which causes the global warming on the earth. 8. According to the text, human beings would disappear in the end. F F T F 从句一律保持陈述语序。 主语从句 同位语从句