人教新课标必修3 Unit 4 Astronomy the science of the stars Reading 课件（共46张PPT）+素材 （6份打包）
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│U4P2 Reading.ppt
│U4P2.mp3
│学案.doc
└─参考
单词复习导入 汉-英.ppt
单词复习导入 英文释义.ppt
　　While reading
　　Skimming:
　　1. Choose the best answer.
　　What’s the main idea of the text?
　　A. A brief introduction on how human beings were born.
　　B. A brief introduction on the birth of the universe and life on the earth.
　　C. The “Big Bang” had a great effect on the birth of the earth.
　　D. The appearance of human beings was a disaster to the earth.
　　2. Analyse the structure of the passage. Write down the main idea for each paragraph. (P27 页第1题)
　　Scanning:
　　1. Put the order of development of life into a timeline. Use the reading passage to help you. (P27 页第2题)
　　2. Answer the following questions.
　　The development of the earth
　　Stage 1: The development of the earth
　　(1) After the Big Bang, what happened?
　　(2) What happened next?
　　(3) What did the water vapour and gases form?
　　(4) What appeared on the earth then?
　　(5) What did the water do?
　　(6) How did the earth come into being?
　　Stage 2: The development of life in water
　　(1)What was there on earth after water appeared?
　　(2) What was there in water next?
　　(3) What was there on earth after the life in water?
　　Stage 3: The development of life on land
　　(1) What appeared next on land?
　　(2) What was there after forests appeared?
　　(3) What was there after dinosaurs?
　　(4) What was there after mammals?
　　(5) Can you say the sequence of development of life on the earth?
　　3. Thint what you have read and discuss these questions in pairs. (P27 页第3题)
　　4. Complete the table.
　　Post reading
　　1. Discuss in groups and give a report to the class. (P27 页第5题)
　　2. Complete the passage with proper words, which will help you retell the text.
　　How did life begin on the earth? At first, the earth was just a cloud of dust. Then the dust  __________ a solid globe, which became violent and exploded loudly. Meanwhile, carbon, nitrogen, water vapour and other gases _____________ to make the earth’s atmosphere. At the same time, the earth itself __________ and water began to __________ its surface. Many millions of years later, the first small plants appeared in water. They multiplied and filled the oceans and seas _____ oxygen, which __________ the later development of early shellfish and all sorts of fish. Next, green plants began to grow on land. They were followed by land animals, insects and amphibians. Later ______ the plants grew into forests, reptiles appeared and then some huge animals ______ dinosaurs developed. The disappearance of dinosaurs