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高中英语必修三unit4_astronomyWarming up and reading 精品课件.ppt

发布:2018-04-07约4.69千字共42页下载文档
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extremely small plants early shellfish all sorts of fish green plants on land insects on land amphibians on land and in the water Green plants grew into forests Later reptiles on land dinosaurs on land After that mammals on land small clever animals Passage structure Main body Para 1: Para 2: Para 3: Para 4: Para 5: A widely accepted theory about the __________ of the __________. The _________ of the ________. The _________ of ______ for life. The __________ of ______ and __________ on the earth. The ________ of _________ and their _________ on the earth. Passage structure Main body Para 1: Para 2: Para 3: Para 4: Para 5: A widely accepted theory about the formation of the universe. The formation of the earth. The importance of water for life. The development of plants and animals on the earth. The arrival of humans and their impact on the earth. Part 1.(1-3) The development of the earth Part 2. (4-5) The development of life What problem are these clever animals causing? They are putting too much CO2 into the atmosphere What will happen when we put too much CO2 into the atmosphere? greenhouse effect global warming animals will die out plants will die out There will be no life on the earth Discussion rise of the sea level icebergs and glaciers melt ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????? the earth may become too . The result is that … hot global warming ---green house effect It caused________________________ Ice in the North Pole ________ Water level ________. The result is that … rises melts The end of our world…. What can we do to prevent the earth from becoming hotter and hotter? Eg.What we can do is save energy. I advise that … “ It is not the strongest of the species that survive, nor the most intelligent, but the one most adaptable to change.”
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