2. the universe solar system planet

3. Reading How life began on the earth?

4. In Chinese culture… ____________ separates( 分 ) the sky from the earth. Pangu 盘古 sky earth

5. _____________ made human beings. Nuwa ( 女娲 )

6. In western countries: ______________ created the world and all living things. God ( 上帝 )

7. According to a widely accepted theory, the earth started from a __________ and later lifes appeared. Big Bang

8. atmosphere a cloud of dust a solid globe atom carbon dioxide nitrogen oxygen water vapour acid insect amphibian reptile mammal 大气层 一团尘埃 固体球状物 原子 二氧化碳 氮气 氧气 水蒸气 酸 昆虫 两栖动物 爬行动物 哺乳动物

9. Look through the passage and find the answers quickly 1) How old is the earth? A Quiz 4) When did dinosaurs disappear? 2) Is there any water in the Mars? 3) At the beginning, did life appear in the water or on land? A. About 3.5 billion years B. About 4.5 billion years C. About 5.5 billion years D. About 6.5 billion years A. Yes B. No A. In the water B. On land A. 100 billion years B. 2.6 million years ago C. 65 million years ago D. 140 million years ago

10. Para 1 Para 2 Para 3 Para 4 Para 5 The ___________ of the earth The ___________ of plants and animals on the earth The ___________ of humans The ___________ of the universe The ___________ of water beginningformation importance developmentarrival part 1 : the development of _________ part 2: the development of ________ Main ideas The passage is developed in the order of time / space A. Explanation( 说明文 ) B. Narrative( 记叙文 ) C. Essay( 散文 ) life the earth What’s the writing style of the text?

11. _____ formed to create stars and other bodies which threw ______ in all directions matter The universe began with a ___________ ， Big Bang atoms Para.1 The beginning of the universe after that

12. Does water exist on other planets now? Para.2 The formation of the earth Timeevents for several billion years after “Big Bang” between4.5 and 3.8 billion years ago then in time as the earth cooled down Carbon dioxide, nitrogen, water vaper and other gases were produced to make the atmosphere. The earth was a cloud of dust. The earth became violent and exploded loudly with fire and rock. water appeared The dust settled into a solid globe. Did water appear on other planets at that time?

13. The earth is ready for life. 1. Water had also appeared on other planets like Mars and it still exists now. Para.3 The imporance of water True or False 3. Many scientists believe that water dissolved harmful gases and acids into the oceans and seas. 2. It was obvious that water was to be fundamental to the development of life. F F T It disappeared later. It was not immediately obvious that water was to be fundamental to the development of life. 水对于生命的发展会起关键作用，这一点在当时 并不明显。

14. extremely small plants insects and amphibians reptiles forests Mammals small clever animals 1. _____________________ multiplied and filled the oceans and seas with ________ oxygen I'm ready for life! Para.3-4 The development of Life ________ rose. They gave birth to young animals and ____________ to feed them. timelife later after that many millions of years later next finally about 2.6 million years ago 2. It encouraged development of _________ and fish 2. They were followed by _____________________ green plants began to grow on land 1. plants grew into ________ Dinosaurs appeared. 65 million years ago _________________ appeared and spread. 2. _______appeared and produced young __________________ shellfish 1. _________________________________ produced milk by laying eggs

15. _____________ have become the most important animals on the earth. Are human beings looking after well the earth now? They are putting too much carbon dioxide into the atmoshphere, which prevents heat from escaping from the earth into space. As a result of this, the earth may become too hot to live on. What did they do to the earth? And what will be the result? Human beings

16. 1. Why was the earth different from other planets? A. It produced a lot of heat. B. The water remained. C. The water disappeared. D. It was the oldest planet. Choose the best answer. B

17. 2. Why was life able to develop on the earth but not on other planets? A. The earth had a solid shape. B. The earth did not have harmful gases in its atmosphere. C. The water stayed on the earth but not on other planets. D. The earth was not too hot and not too cold. C

18. 3. Why was it necessary for plants to grow before animals? A. Animals needed plants to protect them from the sun. B. Plants provided oxygen for animals to breathe. C. Animals could hide from hunters in the forest. D. It was easier for plants to grow. B

19. 4. Why is it wrong in films and stories to show dinosaurs and people together? Because dinosaurs died out long before human beings developed on the earth.

20. 5. It can be inferred from the text that ___. A. after “Big Bang”, what the dust was to become remained a mystery B. plants appeared before the animals C. plants multiplied and filled the oceans with oxygen D. plants played an important part in the appearance of the animals D

21. Can you give some advice to protect the earth? 2. Make full use of new energy 5. set a limit to greenhouse gases into the atmosphere. 1. plant more trees to clean the air 3. use public transport instead of private cars The Earth Day is coming. According to the discussion, some effective measures should be taken to protect the earth. First of all, ___________________________________. Besides, _______________________________________. What is even more important is that ________________. 4. save water ……

22. What is even more important is that as the earth cooled down, water began to appear on its surface. 更重要的是，随着地球冷却下来，地球表面就开始出现了水。 what is even more important is that … 更重要的是... 更重要的是，我们应该种植树木来净化空气。 what is even more important is that we should plant trees to clean the air.