How life began.ppt

1、Scientific Theories,1)What puzzles is Stephen Hawking mentioning in the speech? 2) It is widely believed that the universe began with a _.,Tips for 7选5,1、先看选项。 “以目标为导向的”去阅读文章。把握每一个选项主题的同时划出关键词、主题词。 2、通读文章获取信息并解题。观察文章已给信息与后面7个选项中所给信息之间的逻辑衔接关系： 从意思上判断；从词汇上锁定线索；从关联词上查找 3、通读全文，核对答案。检查恢复后的文章是不是在整体上具有连贯性和

2、一致性，是不是可以很好地表述完整的意思。,A. So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. B. Others, called amphibians, were able to live on land as well as in the water. C. It is true that the lifestyle would be different, but human life hav

3、e adapted in the past and surely could in the future. D. Many millions of years later, the first extremely small plants began to appear on the surface of the water. E. However, according to a widely accepted theory, the universe began with a Big Bang that threw matter in all directions. F . The atmo

4、sphere makes the temperature on the earth so good that a great number of living things can stay alive. G. What is even more important is that as the earth cooled down, water began to appear on its surface.,How is the passage developed? In the order of _. Writing style : Narration? Exposition? 说明文 Ar

5、gumentation?议论文,Write down the main idea for each paragraph. Para1 A widely accepted_ about the _ of the universe. Para2 The _of the earth. Para3 The _of water for life. Para4 The _ of plants and animals on the earth. Para5The _of humans and their _on the earth. Whats the main idea of the passage? (

6、 Title :_),theory,formation,formation,importance,development,appearance,effect,How life began on the earth,Para1 .A widely accepted_ about the _ of the universe. According to a widely accepted theory, the universe began with a Big Bang that threw matter in all directions. -It _ that the universe _ b

7、ecause of a “Big Bang”. It is widely believed / generally acknowledged that a “Big Bang” _ the universe.,theory,formation,Para2. The _of the earth. a cloud of dust -a solid globe First , and later. The earth exploded loudly with fire and rock . They were in time to produce carbon dioxide , nitrogen,

8、 water vapour and other gases, which were to make the earths atmosphere. What is even more important is that as the earth cooled down, water began to appear on its surface. Finally, with massive _, the earths atmosphere was _and water _.,formation,Para3. The _of water for life. It was not immediatel

9、y obvious that water was to be fundamental to the development of life. that the continued presence of water allowed the earth to dissolve This produced a chain reaction, which made it possible for life to develop. - Water _ life to develop . Finally, with massive explosions, atmosphere was produced

10、and water began to appear on the earth. -Finally , with massive explosions, the earths atmosphere was produced and water appeared, enabling life to develop on the earth.,importance,enabled/,allowed,Para4 The _ of plants and animals on the earth. Put the order of the development of life into a timeli

11、ne. Insects and amphibians appeared. Dinosaurs appeared. Small plants grew on the water. Reptiles appeared . Plants began to grow on dry land. Shellfish and other fish appeared. Mammals appeared. -,development,_, small plants grew on the water, _ made it possible for shellfish and other fish to _. _

12、, plants appeared on dry land _ by land animals-insects ,amphibians , reptiles and later dinosaurs. Finally, the _ of dinosaurs made it possible for mammals to develop.,which,followed,appearance/ extinction,First,Next,develop,Para5 .The _of humans and their _on the earth. Its human activities that h

13、ave caused global warming. Owing to human activities , global warming becomes more serious . So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. -Owing to human activities , global warming becomes more serious , which _.,appearance,effect,summary writing,词-句-篇章 （ 要点守衡） 直接提取法-间接整合法 同义替换 句子连接,Homework : Make a summary writing about